The Journal of Eukaryotic Microbiology

LAIRD, MARSHALL

doi: 10.1111/j.1550-7408.1960.tb05973.xpmid: N/A

Epistylis caldwelli n.sp., a β‐mesosaprobic epi‐biont, was collected from the surface zone of only two of 164 water bodies at Singapore. It is recorded from the neustonic mosquito larvae Anopheles (Anophele s) hyrcanus Pallas subsp., An. (Myzomyia) kochi Donitz and Culex (Lutzi a) fuscanus Wiedemann, also from corixids, Micronecta quadristrigata Bred‐din, copepods, Mesocyclops leuckarti aequatorialis Kiefer, and floating dragonfly exuviae. Subsurface and benthic organisms were not infested. The squat zooids (av, 57.6 ± 34.8 μwhen fully extended) have a median contractile vacuole and a long and sinuous macronucleus. Colonies consist of 2–16 individuals on a short and unusually massive stalk up to 50 μthick.

KANEDA, MASAO

doi: 10.1111/j.1550-7408.1960.tb05974.xpmid: N/A

Chlamydodon pedarius has peculiar and interesting cytoplasmic organelles, such as the pharyngeal basket and the cross‐striped band, and exhibits plasmotomy of an uncommon type at the division stage. For comparison of the results of observations on fixed and stained material and on living material examined with phase contrast, and because of finding important differences in such a comparison, this morphological study of the cytoplasmic organelles was undertaken.

WELLS, CAROLYN

doi: 10.1111/j.1550-7408.1960.tb05975.xpmid: N/A

Some cultures of Tetrahymena pyriformis, strain HS, are amicronucleate; other cultures bearing the same designation are micronucleate. Investigation in cooperation with several workers indicates that the amicronucleate HS cultures are the same as the original. To avoid further confusion, we suggest that micronucleate HS cultures be designated “HSM” in the future.

BRAY, R. S.

doi: 10.1111/j.1550-7408.1960.tb05976.xpmid: N/A

Three new species of Caryospora (Coccidiida, Eimeriidae) are described from Psammophis sibilans phillipsi. These are C. psammophi sp. nov.: oöcysts with yellow walls, 25 to 34 μ. ×23 to 31 μ C. hermae sp. nov.: oöcysts with colorless walls, 21 to 24 μ× 20 to 22 p) and C. weyerae sp. nov.: oocysts with colorless walls, 14 to 18 μ× 13 to 17 μ, Endogenous stages of all three parasites are found in epithelial cells of the small intestine of the snake.

LAINSON, RALPH

doi: 10.1111/j.1550-7408.1960.tb05977.xpmid: N/A

Using the mite Dermanyssus gallinae as the vector and the canary (Serinus canariu s) as the avian host, the author was able to demonstrate the transmission of the parasite Lankesterella (=Atoxoplasm a) garnhami Lainson, 1959. Mites were taken from infected canaries and fed to clean ones; 3 out of 4 birds became infected. Mites taken from infected sparrows (Passer domesticus domesticu s) were fed to 4 other clean canaries, all of which became infected. Natural transmission of the parasite was achieved when 2 clean canaries were exposed to infestation by mites which had previously fed exclusively on infected sparrows. Six control canaries, obtained from the same source as the experimental birds, were all shown to be uninfected. It is concluded that the parasites in the sparrow and the canary are identical. The specific name of Lankesterella serini Lainson, 1959, for the organism in the canary becomes, therefore, a synonym of L. garnhami Lainson, 1959.

HULBURT, EDWARD M.; McLAUGHLIN, J. J. A.; ZAHL, P. A.

doi: 10.1111/j.1550-7408.1960.tb05978.xpmid: N/A

A new species of naked Dinophyceae is described and the culture medium for its continued growth denned. The species is distinctive in having a posteriorly placed girdle, characteristic of the genus Katodinium (Fott, 1957), and in possessing a counterclockwise loop of the sulcus about the apex.

CLEVELAND, L. R.

doi: 10.1111/j.1550-7408.1960.tb05979.xpmid: N/A

The centrioles of Trichonympha from termites do not differ, either in structure or function, from those of Trichonympha in Crypiocercus. The previous claims of a difference are erroneous. The roles of the centrioles in the reproduction of new extranuclear organelles and in nuclear duplication are described. The centrioles are autonomous organdies. They are just as essential for a cell's existence as are chromosomes.

WEISS, MARGARET L.; MANWELL, R. D.

doi: 10.1111/j.1550-7408.1960.tb05980.xpmid: N/A

Cultures of tissues from ducks infected with Plasmodium elongatum supported the growth and development of the parasites for 72 hours. Cultured parasites exhibited the same properties when reintroduced into the vertebrate host as did cells derived from similar sources upon direct transfer into a new bird. Parasites derived from acute infections led to patent infections after an incubation period of 7–8 days. Parasites derived from latent infections gave rise to infections becoming apparent after 11–15 days. Results of dilution experiments show that this lag period is not due to low numbers of parasites contained in tissues from latent infections. It is concluded that invaded cells may, after the acute stage of the infection, elaborate some hypothetical inhibitor which arrests multiplication of the parasite, while not interfering with its viability or virulence.

FINLEY, HAROLD E.; LEWIS, AMOS C.

doi: 10.1111/j.1550-7408.1960.tb05981.xpmid: N/A

Vorticellas were maintained on Bacillus cereus in a medium composed of unbuffered Proteose‐Peptone, Cero‐phyl, and the filtrate from boiled wheat kernels. Vorticella‐free aliquots of culture medium were analyzed at critical intervals, beginning immediately before encystment and until re‐encystment. Control aliquots changed insignificantly; significant changes were detected in the experimental cultures. Osmolality increased from 14 to 18 milliosmols/1, Na+ stayed in the range 2 to 3 milliequivalents/1, K+ decreased slightly below the initial value of 5 mEq/1, Ca++ decreased from 5.7 to 4 mg.%, CI fluctuated slightly down and up from 112 mg.% during the initial 8 hr., then down to < 104 mg.%, phosphate decreased steeply from 14 to < 0.6 mg.%, pH increased from 6.7 to 8.5.

BOVEE, EUGENE C.

doi: 10.1111/j.1550-7408.1960.tb05982.xpmid: N/A

A survey of protozoa was made from twelve varied sites in the region of the Mountain Lake atop Salt Pond Mountain, about 8 direct miles NNW of Newport, in Giles County, Virginia. Identifications for these sites and for 6 others previously sampled by other investigators which are recorded in unpublished reports are included. Species identified total 576; in 243 other instances genus is identified, but not species. Organisms seen but not identified to generic level are omitted. One hundred fifty‐one mastigophoran species are listed; with 101 instances of generic, but not specific identification being made. Of these 102 are phytomastigophorean species; and generic placements 77 times are also listed. Seven orders, 7 suborders and 49 genera are represented. Forty‐nine zoomastigophorean species are noted; and 24 other times a genus was identified. Five orders, two suborders, 18 families and 35 genera are included. Eighty‐one species of sarcodina are noted. Seventy‐four of these are rhizopods, and 7, actinopods. Genus, but not species was established for certain sarcodina in 52 instances. Three orders, 10 suborders, 13 families and 44 genera are represented. Ciliophora, including opalinids and suctorians, number 144 species in this list. Three are opalinds, and 141 (including the suctorians) are euciliates. In 88 observations, genus, but not species of ciliophorans was identified. Two classes, two subclasses, 11 orders, 8 suborders, 43 families and 97 genera are included. Two sporozoa are included, being unidentified species of the telosporidian genus Eimeri a, and the sarcosporidian genus, Sarcocystis