Notefi on certain Blood- Tnhafnting Protozoa,. 



245 



divergence between the two forms as regards the nucleus is, 

 however, a more serious point of difference. (Text- Fig. 5.) 



Text- Fig. 5. — Trypanosama raice. 



The nucleus lies towards the flagellar end of the animal. 

 It consists of a large central karyosome, staining blue mottled 

 with red (Laveran's modification of Eomanowski's stain) : 

 this body is surrounded by a clear space, staining pink, 

 which is traversed by numerous fine red rays extending to 

 the limit of the nucleus. I think this nucleus is to be inter- 

 preted as consisting of a large plastin karyosome carrying little 

 chromatin, and of a fine regular reticulum {i.e., the rays). 

 This nucleus is exceedingly constant, which is a feature 

 rare in trypanosomes, where the most bewildering differ- 

 ences in nuclear appearance are the rule rather than the 

 exception. 



In spite of the discrepancy between the above account of 

 the nucleus and that indicated by Laveran and Mesnil, I do 

 not think it very probable that I am here dealing with a 

 distinct species. 



