312 SPOROZOA. 



Habitat. — Blood of the dog, Canis familiar is Linn. : Madras, 

 Madras ; Punjab ; Porttjguese India, Nova Goa ; Central 

 Provinces ; the jackal, Canis aureus Linn. : Madras, Madras ; 

 and the blood of the transmitting tick, Bhipicephalus san- 

 guineus Koch. 



257. Babesia equi (Laveran). (Fig. 152.) . 



Piroplasma equi, Laveran, 1901, pp. 385-8, text-figs. ; Minchin, 



1903, pp. 242, 270, 350; Stephens & Christophers, 1904, 



p. 337. 

 "fPiroplasma sp., Lingard & Jennings, 1904, pp. 161-5. pi. i, figs. 2, 



3. 

 Plasmodium equi, Axe, 1906, pp. 222-5 ; Jolifle, 1907, pp. 51-66. 

 Piroplasm,a equi, Gaiger, 1910, p. 66. 

 Nuttallia equi. Franca, 1910, p. 14 ; Nuttall & Strickland, 1910, 



pp. 524-5 ; Minchin, 1912, p. 380 ; Dschunkvoski & Luhs, 1913, 



pp. 289-302, pis. xiv, xv. 

 Piroplasma equi, Carpano, 1913 6, p. 845; 1914 a, pp. 13-41, 



3 pis. ; 1914 b, pp. 42-53, 1 pi. 

 "fPiroplasm-a equi, Valladares, 1914, pp. 88-94 ; Williamg, 1914, 



pp. 1-6. 

 Nuttallia equi, Schein, 1917, pp. 871-2 ; YakimofE, Schokhor, & 



Koselkine, 1917, pp. 302-11; Du Toit, 1919, pp. 84-104; 



Castellani & Chalmers, 1919, p. 500. 

 Piroplasma equi, Velu, 1922, pp. 197-212, fig. 28. 

 Babesia equi, Wenyon, 1926, pp. 1009-10, fig. 416, pi. xviii, 



figs. 26-30 ; Knowles, 1928, p. 453, fig. 106, 26-30 ; Reichenow, 



1929, pp. 1036-7, fig. 1022. 



Very small, nearly rounded and actively amoeboid, ovoid 

 or pear-shaped, not exceeding 2/x in diameter. Division 



Fig. 152. — Babesia equi (Laveran). (After Wenyon.) 



gives rise to four individuals, which are arranged in a cross- 

 hke manner. The four daughter individuals eventually sepa- 

 rate, escape from the red corpuscle, and infect other corpuscles. 

 Transmission by ticks. 



Remarks. — Round or ring-shaped, oval or rod-shaped piro- 

 plasms showing division rosettes of four, arranged in the 

 form of a cross, were placed by Franca (1910) in a separate 

 genus called Nuttallia : but Wenyon (1926) thinks that 

 differences in size and in the number of daughter individuals 

 produced are not sufficient grounds for recognition of new 

 genera. 



