THE H^MOFLAGELLATES. 291 



distinctly smaller, that is, than T. lewisi. This is probably also a 

 distinct species. 



Galli-Valerio (24), again, has remarked upon the presence of a Trypano- 

 some-like Flagellate, about 22/* in length, in the blood of a dormouse 

 Myoxus avellanarius).' 



An earlier observation is that of Chalachnikow (15 a) of an elongated 

 form, 30 — 40/* by little more than 1/*, from Russian marmots (Spermo- 

 philus guttatus and S. musivus). 



T. pestanai, Bettencourt and Franca, 1905. Length given as 30 — 32 

 (somewhat uncertainly because the parasites are generally rolled up) ; of 

 free flagellum 4'5 — 5/i. This is a relatively wide form, the breadth being 

 5— 6^ju. Anterior end long and fine; kinetonucleus some distance from 

 the extremity. (V.) host : Males taxus, badger. 



Fig. 43. — a, Petrie's Trypanosome from a rabbit ; b, Donovan's 

 Trypanosome from a squirrel. X 2000. (After L. and M.) 



Trypanosomes appear to be not uncommon in bats. Dionisi- first 

 reported the occurrence of the parasites in Miniopterus schreibersii ; 

 Durham' noticed some in a Phyllostoma in Brazil — to be exact, in the 

 blood contained in the stomach of a Stegomyia which had fed on the 

 bat ; and Donovan (vide L. and M. [56]) mentions having observed a large 

 form in Pteropus medius, in Madras. These were probably all distinct 

 species, but no account of them has yet been given. During the last year 

 or two, however, somewhat brief descriptions of certain species are to hand. 



T. nicolleorum, Sergent E. and E., 1905. Length 20—24/*, of free 

 flagellum 4—5 /* ; breadth 1^/t. Anterior end tapering and pointed. The 



' Brumpt appears to have named a Trypanosome from the garden dor- 

 mouse (Myoxus nitela), T. blanchardi (vide Brumpt and Lebailly [11]); 

 the writer can, however, find no reference to the paper describing this form. 



2 Dionisi, 'Atti Soc. Studi Malaria,' i, p. 145, 1890. 



* Durham, ' Rep. Yellow Fever Expedition, Para,' Liverpool Sch. Trop 

 Med., mem. 7, 1902, p. 79. 



