42 SUMMARY OF CURRENT RESEARCHES RELATING TO 



suck infected rats soon show Crithidia-\ike and Leptomonas-Hke forms — 

 stages of Trypanosoma leu-isi. 



Studies in Trypanosomes. — David Bruce, A. E. Hamerton, H. E. 

 Bateman, and F. P. Mackie* describe Trypanosoma inyens sp. n. from 

 reed-buck, bush-buck, and ox in Uganda. In stained preparations this 

 huge Trypanosoma may measure as much as 122 microns. "When alive 

 it moves slowly and deliberately across the field of the Microscope, with 

 a fine rippling, or at times a broader undulating movement. 



C. H. Martin and Muriel Eobertsonf found in the intestine of the 

 fowl a form which they identify with that described by Eberth as 

 Trypanosoma eberthi ( = Spirocliseta eberthi Liihe). Along with it there 

 was a TricJtomonas-\ike form and a Monocercomonas-like form. All 

 three may be phases of one life-cycle. 



C. Mathis and M. Leger* describe Trypanosoma calmettei sp. n. from 

 Tonkin fowls, in which it is of rare occurrence, and apparently without 

 pathogenic importance. 



New Trypanosome.§ — Jivoin Georgewitch describes Crithidia simu- 

 h'se sp. n. from a specimen of the fly, Simulium columbacmsis, in Servia. 



Chytridiopsis.|| — L. Leger and 0. Duboscq report four new species 

 allied to Schneider's Cltytridiopsis socius. They occur in the intestinal 

 epithelium of Arthropods. Their affinities remain obscure, but it is 

 suggested that they are microsporidia of minute size with spherical 

 spores. 



Two New Parasites from Tench. % — M. Elmassian describes Coc- 

 cidium ronxi sp. n. — its schizogony, macrogametes and microgametes, 

 conjugation, sporonts, cysts and sporocysts. Each cyst has four sporo- 

 cysts, and each sporocyst two sporozoites — one of the features of the 

 genus Coccidium (Eimeria). Another very different parasite occurred 

 along with the Coccidian in the middle intestine, and in some cases 

 profoundly modified the Coccidian. This second parasite is described 

 as Zoomyxa legeri g. et sp. n. There are four different modes of 

 schizogony and there is a sexual process. The systematic position of 

 Zoomyxa is obscure. In some ways it resembles Chytridiopsis, in other 

 ways it suggests a derivation from the lower Mycetozoa. 



New Spirochaet from Fresh-water.**— K. Niigler describes Spirocliseta 

 flexibilis sp. n., which he found in foul mud. There is no undulatory 

 membrane, but there is a characteristic ectoplasmic " periplast fibril " 

 twisted in a close spiral. This new form is nearest other free-living 

 species, such as 8. plicatiUs Ehrenberg. S. balbiani Certes, S. anadontse 

 Keysselitz, and S. pinnae Gonder. 



* Proc. Roy. Soc, Series B, lxxxi., No. B549, pp. 323-4 (1 pi.), 

 t Tom. cit.", pp. 385-91 (1 pi.). 



t C.R. Soc. Biol. Paris, lxvii. (1909) pp. 452-4 (1 fig.). 

 § Tom. cit., pp. 480-2 (1 fig.). 



|| Arch. Zool. Exper., i., Series 5 (1909) pp. ix.-xiii. (2 figs.). 

 <f Op. cit., ii. (1909) pp. 229-70 (2 pis.). 

 ** Centralbl. Bakt. Parasitenk., 1. (1909) pp. 445-7 (1 pi.). 



