Notes on the Life- History of Trypanosoma gambiense, etc. 71 



more especially those of the two last-named workers. There are no serious 

 discrepancies between the cycle in the fly sketched by Bruce, Hamerton, and 

 Bateman and that described above, except that I consider the fly history 

 to be in reality a double development. In many points my work is also in 

 agreement with that of Kleine and Taute,* except that I do not consider 

 that the " male " forms described by them play any important part in the 

 cycle. A further discrepancy consists in the view held by the latter authors 

 at the time of writing their paper in regard to the salivary gland phases 

 being a non-essential part of the cycle. My interpretation of the endogenous 

 cycle in the blood of the vertebrate is at present, so far as I am aware, 

 unconfirmed by other workers, largely, I imagine, owing to the fact that the 

 interest has been concentrated for some time past on the appearances in 

 the fly rather than on those in the vertebrate. 



*' ' Arbeiten aus deni Kaiserlicheu Gesundheitsamte,' vol. 31, part 2. 



