Victorian Rotifers. 51 



cone thickly furnished with cilia. The anterior portion of the 

 body is occupied with a sac filled with spermatozoa. There are 

 two red eye spots placed well forward. Total length, 0.21 mm. ; 

 depth, 0.04 mm. 



Megalotpocha. 



J/, alhoflavicans, Ehrenberg. Common. 



Conochilus. 



^C. volvox. 



C. dossuaris^ Hudson. Heidelberg. 



There is another form of this genus occurring plentifully, which 

 .approaches C. unicornis, Rousselet, in general characters. There 

 are, however, differences in the position of the dorsal antenna, 

 and tlie form of the coronal disc, as well as the distinct 

 bifurcation of the antenna at its distal end, which, whein 

 compared with Rousselet's figure, suggests varietal if not specific 

 difference. I trust to have further opportunity of studying 

 this animal. 



Order H.— BDELLOIDA. 

 Family. — Philodinadae. 



Philodina. 



^P. 7'oseola. 

 ^F. citrinu. 

 P. megalotrocha, Ehrenberg. Mr. W. Stickland. 



Rotifer. 



*E. vulgaris. 

 ^R. tardus. 



R. macrurus, Schrank. Carrum. 



R. megaceros, Gosse. Mr. W. Stickland. 



Actinupus. 



A. neptunius, Ehrenberg. Heidelberg. 



Callidina. 



A number of forms of this genus have been seen, but not 

 certainly identified. 5a 



