480 SUMMARY OF CURRENT RESEARCHES RELATING TO 



New Trypanosome.* — C. A. Kofoid and Irene McCulloeh describe 

 Trypanosoma triatomse sp. n. from a Hemipteran bug (Triatoma 

 protract-us) found in the nests of the wood-rat (Neofoma fuscipes). The 

 trypanosome occurs in the digestive tract ; in the stomach it is found 

 along with blood possibly derived from the wood-rat. The digestive 

 tract of the bug also contains crithidial and trypaniform stages which 

 are probably later forms in the cycle in the Invertebrate host. The 

 trypanosome and crithidial stages are remarkably like the corresponding 

 stages in the cycle of Schizotrypanum cruzi Chagas in Conorhinus 

 megistus from Brazil, which is the setiological factor in South American 

 human trypanosomiasis. The authors describe the early stomach phase, 

 or recently ingested trypanosome, the late stomach phase or merozoite, 

 following a probable multiple fission in the epithelial cells of the 

 stomach, a crithidial phase of large size in the stomach, with a 

 " rolled-up " stage suggestive of intracellular multiple fission in the 

 crithidial stage, and a transition series leading to small stout crithidial 

 forms. These probably become small haptomonad forms which are 

 found undergoing binary fission in the rectum. The final trypaniform 

 stages are apparently different from those of Schizotrypanum in some 

 minor details. They occur in numljers in both transition and final 

 stages in the rectum. The crithidial stage appears to be more extended 

 in this species than in Trypanosoma leicisi, and to run a cycle of larger 

 forms in the stomach than in the rectum. The structure of the so- 

 called " kinetonucleus " supports the interpretation that it is in reality 

 the parabasal body. 



Intestinal Protozoan Parasites in Turkey.! — Theobald Smith 

 describes a Protozoon which occurred sparsely in the mucous membrane 

 of the intestinal villi of the turkey. He did not find it possible to 

 determine whether it belongs to one or the other of the two well-known 

 species of avian Coccidia {Eimeria avium and Isospora lacazei), or whether 

 it is a foreign aberrant type which fails to survive in the accidental host. 

 The relative smallness of the schizonts, which measure 10 microns, and 

 of the merozoites (the only one that could be found and measured being 

 5/u. in length) points to the second view. 



Klossiella in Gruinea-pig.| — Louise Pearce has found in the 

 kidneys of twelve apparently normal guinea-pigs (from Pennsylvania 

 and New Jersey) a parasite that closely resembles Klossiella muris, 

 described by Smith and Johnson, and the renal parasite of two West 

 African guinea-pigs, described by Seidelin. The number of sporozoites 

 is from eight to twelve, usually eight. A ring form which is unlike any 

 of the stages in either the sporoblast or schizogonic cycle is tentatively 

 interpreted as a male element or microgamete. A tubular form which 

 resembles the glomerular body of K. muris may be the schizogonic 

 phase of the parasite. 



* Publications Univ. California (Zool.) xvi. (1916) pp. 113-26 (2 pis.), 

 t Journ. Exper. Med., xxiii. (1916) pp. 293-300 (1 pi.). 

 X Journ. Exper. Med., xxiii. (1916) pp. 431-42 (8 pis.). 



