396 ALDO CASTELLANI AND ARTHUR WILLEY. 
and a leper asylum in Bombay. He found 'l'rypanosoma 
rare in tortoises, no heematozoa in lizards, but only exception- 
ally did he find a frog free from blood-parasites. The Bombay 
frogs, of which he examined 372, belonged to two species— 
Rana tigrina and Rana limnocharis, both of which also 
occur in Ceylon, where, however, we have not yet established 
the presence of Hematozoa. 
Besides Drepanidium monilis, Danilewskya krusei, 
and Trypanosoma, Dr. Berestneff found a parasite which 
he believed rightly had not been previously described. He 
gives numerical details, which we regret we cannot clearly 
understand. There is one table, from which it appears that 
out of the 372 frogs 47 contained the new parasite; but he 
mentions other frogs examined in June and July, 1900, which 
are not included in the table, so that we are unable to calculate 
the percentage of infected cases. Dr. Berestneff described 
the parasite as follows :—In the red blood-corpuscles there is 
to be seen a strongly refringent colourless capsule like a 
cylindrical tube, with one end enlarged in a club-shaped 
manner. The parasite lies within the capsule; the attenuated 
end of the capsule is empty, both ends are rounded and 
curved, the whole embracing the displaced nucleus of the 
corpuscle after the manner of Halteridium. 
The author states that when the red corpuscle becomes dis- 
integrated or dissolved the capsule with its contained parasite 
issues into the blood-plasma and straightens itself out, and 
under these conditions the parasite only occupies a portion of 
the capsule and eventually begins to move about inside the 
capsule, gliding from the wider portion into the narrower 
portion of the latter. Thereupon the motile parasite per- 
forates the capsule at its narrower end and emerges into the 
plasma actively moving. 
Dr. Berestneff says that the parasite closely resembles the 
free Danilewskyakrusei. It is blunt at one end, acumi- 
nate at the other; it moves with the blunt wider end directed 
forwards and the nucleus lies near to the anterior end. The 
movements are much slower than those of the Drepanidia. 
