326 SUMMARY OF CURRENT RESEARCHES RELATING TO 



New Suctoria.* — B. Collin gives preliminary diagnoses of four new 

 species of Aeineta, of Acinetopsis campanuliformis sp. n., Ophryodendron 

 reversion sp. n., and of two new genera Rhynchophrya on Hydrophilus 

 and Dactylophrya on marine hydroids. 



Studies on Trypanosomes.f — A. Laveran discusses Trypanosoma 

 conyolense Broden from domestic animals in the Congo area, relating 

 experiments as to its pathogenic effect on various Mammals, and distin- 

 guishing it from T. dimorphon and other species. A. CariniJ describes the 

 endoglobular stages of various species of Trypanosome, e.g. in the blood 

 of Lepto dactyl us ocellatus, and points out that during the first stages it is 

 impossible to differentiate them from Hamiocytozoa in the strict sense, 

 for there is no trace of the characteristic locomotor apparatus (blepharo- 

 phast, flagellum and undulating membrane). 



New Trypanosome in a Vole.§ — A. Laveran and A. Pettit describe 

 Trypanosoma microti sp. n., which they found in a vole, Microtus arvalis, 

 where it seems to have no pathogenic influence. Attempts to inoculate 

 mice and wood-mice with this new form were unsuccessful. The authors 

 distinguish it from Trypanosoma leicisi, T. duttoni, T. grosi, and other 

 species. 



Trypanosome of a Gecko. ||— G. Catouillard describes Trypanosoma 

 platydactyli sp. n., from the common gecko of Tunisia (Platydactylus 

 muralis), and distinguishes it from other species recorded from other 

 geckos. 



Trypanosome in Alimentary Tract of Pontobdella muricata.lf 

 Muriel Robertson brings forward strong evidence that the trypanosome 

 in the leech Pontobdella is Trypanosome raise, from the skate. She gives 

 an account of the trypanosome phase as found in the intestine of the 

 leech and of its development from the resting-form. 



Transmission of Trypanosoma lewisi by Rat-flea.** — E. A. Minchin 

 and D. Thomson find from their experiments that the rat-flea {Gerato- 

 phyllns fasciatus) can transmit Trypanosoma leicisi from infected to 

 non-infected rats. The transmission takes place by the cyclical 

 method. Transmission by the direct method has not been proved. The 

 incubation-period of the flea, that is to say, the period occupied by the 

 developmental cycle of the trypanosome, has a minimum length of six 

 or seven days, but may be longer. The multiplication-period of the 

 trypanosome in the rat has a length of about twelve days. In the de- 

 velopmental cycle the establishment of the trypanosome in the flea 

 begins with multiplication of C'rithidia-\ike forms in the rectum. 



Amakebe and East Coast Fever. ft— David Bruce, A. E. Hamerton, 

 H. R. Bateman, F. P. Mackie have reached the following conclusions :— 



* Comptes Rendus, cxlix. (1909) pp. 1094-5. 



t Ann. Inst. Pasteur, xxiv. (1910) pp. 81-95. t Tom. cit., pp. 143-51 (1 pi.)- 



§ C.R. Soc. Biol. Paris, lxvii. (1909) pp. 798-800. 



| Tom. cit., pp. 804-5 (6 figs.). 



f Quart. Journ. Micr. Sci., liv. (1909) pp. 119-39 (1 pi. and 5 figs.) 



** Proc. Roy. Soc, Series B, lxxxii. (1910") pp. 273-85. 



ft Tom. cit., pp. 256-72 (1 pi.). 



