752 



PROTOZOOLOGY 



Family 13 Cyathodiniidae da Cunha 



Genus Cyathodinium da Cunha. Conical or pyriform; broad cyto- 

 stome occupies the entire anterior end and extends posteriorly 1/4- 

 3/4 the body length; deep with prominent ridges; oral cilia in a sin- 

 gle row on left ridge; body cilia comparatively long, confined to an- 

 terior half; macro nucleus round or ellipsoid; a micro nucleus; one to 

 several contractile vacuoles; in the caecum and colon of guinea pigs. 



C. conicum da C. Inverted cone; 50-80ju by 20-30/1 ; in the caecum 

 of Cavia aperea and C. porcella. 



C. piriforme da C. (Fig. 320, /). Typical form inverted pyriform; 

 second form conical with tapering anterior end; contractile vacuole 

 posterior; 30-40ju by 20-30ju; in the caecum of Cavia aperea and C. 

 porcella. Occurrence and cytology (Lucas, 1932, 1932a; Nie, 1950). 



Family 14 Blepharocoridae Hsiung 



Genus Blepharocorys Bundle. Oral groove deep, near anterior end; 

 3 (oral, dorsal and ventral) ciliary zones at anterior end; a caudal 

 ciliary zone; in the caecum and colon of horse or stomach of cattle. 

 Many species. 



Fig. 321. The developmental cycle of Conidiophrys pilisuctor (Chatton 

 and Lwoff). a, trophont with two tomites; b, freed tomite; c, tomite be- 

 coming attached to host's hair; d, lacrymoid trophont; e, spheroid stage; 

 f, g, cucurbitoid stage. 



