11

as a considerable number of scattered chromatin granules disposed throughout its
substance. Whether this body is to be regarded as having any connection with
the parasites under discussion I am unable to say.

     I have performed no post-mortem examination on any animal infected with
the parasite, so that my observations regarding it are limited entirely to its
appearance in the peripheral blood. While it undoubtedly has affinities with the
hæmogregarines the fact that it is parasitic upon the leucocytes and that it
represents a hitherto entirely unknown form of mammalian blood infection would
seem to justify its recognition as the type of a new genus. Until further resear-
ches shall have revealed its exact zoological position the name Leucocytozoon
canis appears to me to be an appropriate one for purposes of reference.

     So far as I was able to ascertain the dogs were but little, if at all, affected
by the presence of the parasites. The temperature of one heavily infected dog
was taken as frequently as possible during a period of ten days with the following
results:—

     I consider that the variations above a normal temperature which occur in the
above record are not greater than are often observed in perfectly healthy animals
during the summer in India.