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Larvae ; attack a sheep (first host). Moult on sheep 
in seven to eight days and become 
Nymphs. After growing (twenty-one days) they fall 
off and moult on the ground and become 
Adults. The Adults attack a sheep (second host) and 
give infection. 
8. P. muris. —Found in the blood of three albino 
rats ( [Mus rattus). About one per cent, of corpuscles 
infected. Typical £ pears 5 occur. The rats in all 
cases died from (?) Piroplasma. 
9. P. rossi. —In monkeys, East Africa. 
10. P. sp. —In sheep. India. Resembles 
P. parvum. 
11. P. cervi. —In the fallow deer ( Cervus dama) 
in Lisbon. Bacillary and cross forms were present, 
but no typical pears. 
12. P. aristotelis .— In young hinds ( Cervus 
aristotelis ) in Annam. Ovoid and cross forms occur. 
Bacillary forms not found. It may be identical with 
the previous species. 
13. P. quadrigeminum. —In Ctenodactylus gondi , 
the gundi, a rat-like rodent of N. Africa. The 
following forms occur in naturally infected animals :— 
(1) Young forms 1 ^ in diameter. These may 
become elongated or comma-shaped. 
(2) Forms 2 ^ in diameter having a vesicular 
nucleus with a large curved chromatin mass and a small 
punctiform chromatin mass, as in Leishman-Donovan 
bodies. 
(3) Typical pyriform parasites larger than the 
last. In Ct. gondi artificially infected, parasites appear 
about the third day and in about a week multiplication 
forms. The parasite divides into four, the segments 
remaining for some time attached in the form of a fan. 
14. P. vesperuginis {vide p. 249). 
