ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 97 



medium suitable for the growth of trypanosomes. In media kept at 

 16-20° C. growth was perceptible iu a week, but growth at 37° 0. was 

 hardly perceptible. The author describes the morphological character 

 of the intra- and extracellular forms of the parasite, as well as the forms 

 observed in culture. In company with the sporozoon there exists a 

 small bacillus which grows readily at 37° C, and can be obtained in pure 

 culture by incubating at that temperature. The author then discusses 

 the relationship of these symbiotic organisms to the disease. 



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Feb. 19th, 1913 H 



