254 



ally assuming a streaked appearance hut no definite ribbing 

 could be discerned. Sometimes small vacuolar-like spaces 

 were noticed in front of the nucleus. The undulating 

 membrane was very distinct and deeply folded; owing to the 

 situation of the kinetonucleus it naturally did not occupy 

 the posterior part of the parasite. The flagellum was 

 Btrikinglj visible, running along the edge of the membrane 

 and usually crossed the body in its anterior portion; it 

 ended in a well-marked free llagellum. 



In view of the marked pleomorphism of Trypanosoma 

 vahitorlum (Mayer), as described by Laveran and Mesnil, 1 

 we hesitate to separate this trypanosome from that species. 

 Nevertheless the wide geographical separation of the frogs 

 of Australia from those of Europe, coupled with the prob- 

 ably enormous lapse of years since these species of trypano- 

 somes or their hosts, now respectively occupying these 

 localities, were associated, gives reason to suppose that 

 future research may reveal specific differences between the 

 parasites. This is supported by the fact that our specimens 

 seem decidedly shorter than 7. votatoriiou, Mayer//'. nie(ju, 

 Button and Tod, and T. kiirijozenkloiu Dutton and Todd, 

 and to have the nucleus situated distinctly nearer the 

 posterior end." In these respects it seems to closely 

 resemble 7. nelspriiitcnsc, Laveran, from a Transvaal frog. 

 It is readily distinguishable from 7. hinpiiuituiu, Sergent. 



The trypanosome of Llmnodijiutstes tasnmtiiensis resem- 

 bles in appearance the remarkable 7. metfu of Dutton and 

 Todd, as figured by Laveran and Mesnil ; as these authors 

 consider that this species is merely a form of 7. rotntorimn 

 and as our specimen stained so poorly as to make detailed 

 examination impossible, it must also be provisionally placed 



1 Laveran and Mesnil, " Trypanosomes and Trypanosomiases," Engl, 

 transl. by Naharro, 1907, p 465 etc. 



» Liihe in Mense's " Handbuch der Tropenkrankheiten," III, 1906, p. 



