EIMERIA. 



193 



Sen (1932) recorded a case of coccidiosis in a buffalo calf 

 in the Coorg District, and stated that the parasites comprised 

 two species, one a larger form, of yeUow colour, provided with 

 a micropyle and the other a small colourless form without 

 a micropyle. I think the former can be identified as E. smithi 

 and the latter as E. zilrni. Ware (1936) has for the first time 

 noted the occurrence in India of ^. smithi as such. 



Habitat. — AHmentary canal of Bos indicus Linn. (?) : 

 United PnoAncNCES, Muktesar ; ahmentary canal of Bos 

 bubalus Linn. : South India, Coorg. 



121. Eimeria southwelli Halawani. (Fig. 96.) 



"fEimeria southwelli, Halawani, 1930 a, pp. 1-3, fig. 1; 1930 6, 

 p. 326. 



Oocysts polymorphic. Immature oocysts generally pea- 

 shaped. Mature oocysts cylindrical or sausage-shaped ; 



Fig. 96. — Eimeria southwelli Halawani. A, an immature pear-shaped 

 oocyst containing a large spherical zygote ; B, an imma- 

 ture oocyst retaining its hind-bulb to a slight degree ; 

 C, oocyst containing four sporoblasts ; D, fully matm-e 

 oocyst containing oval sporocysts. (After Halawani.) 



cyst- wall colourless and transparent. A residual mass is 

 usually present in the immature cyst, but often disappears as 

 the cyst matures. Sporoblasts four, arranged lengthwise, 

 end to end, sometimes in pairs or in a chain. Sporocysts oval. 



Dimensions. — Oocysts 25-50 )u, in length, average dSfx, 

 average width 12 ^u. ; sporocysts 10-12 /a in length. 



Remarks. — It is presumed by Halawani that the matme 

 oocysts from the parent pass, via the cloaca, up the oviduct 

 to the uterus, and by hberatton of their sporozoites infect 

 the intra-uterine embryos. 



Habitat. — Spiral valve of the intestine of the embryo of 

 a shark, Mtobatis narinari Agassiz, from the Indian Ocean : 

 Ceylon, Colombo. 



SPOE. o 



