ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 465 



Locomotion of Protists.* — Jungi Yamamoto has studied Vibrio, 

 Spirillum, Trypanosoma, Bodo, Polytoma, Opalina, Golpidium, and the 

 like, with particular reference to (1) the proximal basal granule ; (2) the 

 " middle piece " of the flagellum or cilium, consisting of the 'axial fila- 

 ment and a spiral fringe ; (3) the distal granule (which is not visibly 

 differentiated in Polytoma and Golpidium) ; and (4) the terminal fila- 

 ment. He brings the typical spermatozoon into line with the actively 

 locomotor Protist as regards its locomotor apparatus. 



Studies on Trypanosomes.t — A. Laveran and A. Pettit continue 

 their account of Trypanosoma grosi from M us sylvaticus and Trypanosoma 

 microti from Microtus arvalis. These Trypanosomes of mice and voles 

 have a strong resemblance to Trypanosoma lewisi, and it remains to be 

 seen whether they have not been derived from that species. 



German AnschutzJ discusses the triple infection of canaries with 

 Trypanosoma paddse, Hwmoproteus orizivorse, and Proteosoma. 



Encystation in Crithidia.§ — F. Rosenbusch describes in Crithidia 

 muscse domesticse the gradual passage from the typical flagellate form to 

 an encysted phase. The remarkable retraction and coiling of the 

 flasrellum is discussed. 



\-^ v 



Studies on Spirochgets. — J. F. Selenew || describes interesting 

 annular and stellate figures formed by Spirochseta pallida, and discusses 

 their possible significance. A. TedeschilT has made experiments on the 

 Spirocheet {S. duttoni) of African recurrent fever. 



Reproduction of Kalpidorhynchus arenicolse.** — Margaret Robinson 

 makes a contribution towards an account of the reproduction of this 

 Gregarine described by Cunningham from the lobworm. She describes 

 the formation of the first spindle and subsequent divisions, the male and 

 female gametes, the occurrence of multiple associations (which do not 

 seem to come to anything), the structure of the karyosome, and the 

 increase in the number of karyosomes by a kind of internal budding 

 from the chromatin layer. 



Cnidosporidia in Mayfly Larvae. ft — L. Leger and Ed. Hesse have 

 found in larvee of Ephemera vulgata representatives of three different 

 genera of Cnidosporidia. One, Nosema schneideri, occurs in the epithelial 

 cells of the intestine. The second, Stempellia mutabilis g. et sp. n., 

 occurs in the fatty body. It has a peculiar type of sporulation. The 

 third, Telomyxa yluyeiformis g. et sp. n., occurs in the same place, but 

 never along with the second. It combines characters of Microsporidhi 

 and Myxosporidia. 



* Centralb. Bakt. Parasitenk., liii. (1909) pp. 38-42 (1 pi. and 1 fig.). 



t C.R. Soc. Biol. Paris, lxviii. (1909) pp. 571-3. 



X Centralbl. Bakt. Parasitenk., liv. (1910) pp. 328-31 (2 pis.). 



§ Op. cit., liii. (1910) pp. 387-93 (1 pi.). 



|| Op. cit., liv. (1910) pp. 7-11 (2 pis.). f Tom. cit., pp. 12-21. 



** Quart. Journ. Micr. Sci., liv. (1910) pp. 5G5-76 (1 pi.), 

 ft Comptes Rendus, al. (1910) pp. 411-14. 



Aug. 17th, 1910 2 i 



