93 



Cercomonas intestinalis (Ehrenberg, 1838) Perty, 1852, found in 

 frogs. 



Lamblia muris (fig. 18) will probably stand, based on Dimorphus 

 muris Grassi, 1879. 



Lamblia cuniculi. There is some doubt as to the status of this 

 name. Davaine (1875a, 128-129) has described from rabbits a 

 protozoon, which he designated as Hexamita duodenalis and which 

 Railliet (1893 a, 169) identifies as a synonym of Lamblia intestinalis 

 (Lambl). On basis of the principle that identifications are to be 

 accepted as correct until shown to be incorrect, Stiles has accepted 

 duodenalis as name (1902) for the form in question. The question 

 now arises as to the relation of cuniculi to duodenalis. If they are 

 accepted as identical, duodenalis will supplant cuniculi, and a new 



FIG. 19. Auto game to- 

 cyte of Lamblia muris. 

 (After Bensen, 1908, 

 fig. 6.) 



FIG. 18. Lamblia muris of mice. (After 

 Bensen, 1908, fig. 1.) 



name must be given to the form found in man. If duodenalis is 

 taken as identical with intestinalis Lambl, duodenalis remains as 

 name for the form in man, and cuniculi Bensen will stand for the 

 species in rabbits. If Railliet's interpretation of synonymy be 

 shown to be incorrect by proving that duodenalis Davaine is not 

 to be considered in connection with either form, a new name must 

 be given to intestinalis Lambl. 



Genus TRYPANOSOMA s. 1. 



An extensive group of parasitic protozoa, known as "trypano- 

 somes," has recently been the basis of considerable literature. The 

 genus Trypanosoma was originally based upon a species ( T. rotato- 

 rium) found in frogs, and while most trypanosomes have been 



