A description of a new tapeworm species, Catenotaenia henttoneni, parasitizing the voles Clethrionomys glareolus and C. rutilus (Arvicolidac) in Finnish Lapland, is given. Wc show that all Catenotaenia from arvicolid rodents in Europe, usually described as C. cricetorum Kirschenblat, 1949, evidently represent the species C. henttoneni.
Net photosynthetic rate (PN) and dark respiration rate (RD) were measured in Vitis vinifera L. cvs. Dimiat 4/24 (23rd subculture), Dimiat 4/38 (22nd subculture), and Italian Riesling 3/47 (22nd subculture) on days 3, 2, and 1 (1st series) before transfer from the in vitro culture and on days 14, 15, 16 (2nd series) and 28, 29, 30 (3rd series) after the transfer. PN of in vitro and ex vitro plants was strongly affected by irradiance. PN and RD of in vitro plantlets were lower and transpiration rate (E) was higher compared to those of ex vitro plantlets. PN, RD, and E changed in the course of acclimation. and T. Slavtcheva, V. Dimitrova.
Several conditions of isolation were evaluated to determine which yielded the greatest number of thermotolerant and pathogenic freeliving amebae. Swab samples, easier to obtain and process, produced more pathogenic amebae than water samples. If water samples are required, 50-ml volumes gave the greatest percentage of pathogenic isolates. An incubating temperature of 42"C yielded the most thermotolerant amebae. A total of 11 pathogenic isolates were obtained from 762 environmental samples and were Acanthamoeba (55 %), Naegleria fowleri Carter, 1970 (27 %), and N. australiensis De Jonckheere, 1981(18%).