238 



Proceedings of the Royal Physical Society. 



measuring 12 /* to 15 /x or 16 //, ; it is slightly pointed at one 

 end, and there is a tendency to curl up at this end, but the 

 condition found here does not approach the bent-up double- 

 shanked appearance of Hjemogregarines. The protoplasm is 

 finely alveolar, and no conspicuous granules, food particles, 

 or pigment are present: vacuoles are also absent. As in 

 many parasites, there is no obvious differentiation into ecto- 

 plasm and endoplasm. Quite the most conspicuous feature 



Fig. 3. 



Text-Figs. 1, 2, and '^. — Trypanosoma pythonis. 

 Fig. 1. The blepharoplast is in close proximity to the nucleus. 

 Fig. 2. The blepharoplast is connected with the nucleus by a fibril. 

 Fig. 3. Multiple infection of a single erythrocyte. 



of the organism is the nucleus, which is large for a protozoon 

 of this size. At first sight it strongly suggests the complex 

 reticulate character of a metazoan nucleus, more especially as 

 it is often rather elongated. In favourable specimens, how- 

 ever, it appears to be of that type so often found in blood 

 parasites. In fact, it closely resembles the nucleus described 

 by Schaudinn in Trypanosoma nocfuce, that is to say, it is 

 composed of a hollow sphere, showing eight masses of 

 chromatin, while within this sphere is the karyosome, which 

 is also certainly at times a hollow structure, showing a number 



