A Camel Trypanosome. 



563 



in Palaeozoic Monticuliporas the same relation holds, for in the case of 

 fossils encrusting shells, a thin graphite-lite layer of alga is sometimes found 

 between the Monticulipora and the shell. 



At present I am not prepared to say to what genus the Zooxanthella 

 monad of Merlia belongs. I propose to name the species "noronhae" in 

 honour of Senhor A. C. Noronha, who rendered invaluable assistance during 

 the dredging operations off Madeira and Porto Santo Island. The name 

 Merlia is a synonym of Monticulipora, the name of the sponge being 

 Monticulipora normani, Kirkp. 



A Camel Trypanosome, with some Remarks on the Biometric 

 Method of Diagnosing Trypanosomes. 

 By Dr. H. L. Duke. 



(Communicated by Sir John Rose Bradford, K.C.M.G., Sec. R.S. Received 

 September 2, 1912.) 



The trypanosome which forms the subject of the following experiments 

 was kindly forwarded to Mpumu by Mr. E. Montgomery, M.R.C.V.S., from 

 the veterinary pathological laboratory, Nairobi. The organism was originally 

 obtained from the blood of a camel from Boran. Experiments were under- 

 taken to see whether the trypanosome was transmissible by laboratory-bred 

 G. palpalis, and a few sub-inoculations were performed. 



Morphology. — Length : 400 trypanosomes taken at random were measured, 

 .and the results are given in Table I. As is there shown, the length varies 

 between 18 /x and 34 /x. 



Shape : The great majority of the trypanosomes seen are slender ; a few 

 forms occur which are markedly broader. The flagellar end may be very 

 much drawn out, the kinetic nucleus being sometimes from 4 yu, to 4'5 p from 

 this extremity. 



Undulating membrane : Well developed. 



Flagellum : In the slides examined, only one single specimen was 

 observed in which there could be any doubt as to the presence of a free 

 flagellum. In the majority, the free portion of the flagellum is very well 

 marked. 



Kinetic nucleus : Always clearly discernible ; small and round, situated 



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