C. M. Wen yon 
o r 
fall into the group leishmania, according to the definition given above, and 
would receive the provisional names of Leishmania tarantolae and Leishmania 
Henrici. If it should subsequently be found that the flagellate of the gecko is 
in reality identical with that causing Oriental sore then it would of course 
become Leishmania tropica , but proof of this is at present wanting. The flagel¬ 
late of the chamaeleon occupies an intermediate position. It undoubtedly 
has an insect host but, unlike the parasite of the gecko, it is not a tissue 
parasite and as far as my investigations go it appears to be confined to the 
intestine and cloaca. However, it comes within the definition as having both 
hosts and it will therefore become Leishmania chamaeleonis . It seems better 
to place it in the genus Leishmania than in Leptomonas, for the latter would 
imply that it was a purely insect, or at least invertebrate, flagellate. 
The intestinal habitat is of interest as it is an infection probably acquired 
from some insect and indicates a stage by which such an insect flagellate may 
eventually become a tissue parasite. It occupies an intermediate position 
between the purely insect flagellate and the vertebrate ones such as that of 
