318 
PiropJasmosis 
The parasites (Fig. 12) are of large size, usually rounded, occurring 
singly, in pairs, and occasionally in fours. The nucleus of the parasite 
is very large and rounded when at rest. Multiplication occurs b}’ direct 
division of the nuclei, two daughter parasites resulting which may in 
turn .‘subdivide in a similar manner. 
Fig. 12. Bossiella 7-ossi (Nuttall, 1910); (1) single free parasite; (2-3) single uninucleate 
intracorpuscular parasites ; (4-12) progressive stages of division into four parasites. 
Fig. 13. Nicollia quadrigemina (Nicolle, 1907): different stages drawn from 
a blood-film kindly lent by Prof. C. Nicolle. (Original, G. H. F. N. del.) 
Nicollia ciuadrigemiria (Nicolle, 1907), found in the gondi (Ctenodac- 
tylus gundi )—a rodent—in Tunisia by Nicolle, and referred by him to 
the genus Piroplasmu ; but it differs marketlly from the members of 
this or any other genus and a new genus was therefore founded for 
it by me in 1908. The parasites (Fig. 13) are oval or piriform, are 
commonly grouped in fours, often in a fan-like manner, and show distinct 
binuclearity. 
