SECT. VIII 



ROTIFERA 



179 



ciliated prominences are present within the circlet of cilia, and some- 

 times there is a second circlet internal to the first. 



The body is usually distinguishable into the trunk and the tail (/). 



l.r 



FIG. 94. Brachionus rubens. A, from the dorsal aspect ; B, from the right side. 

 a. anus ; br. brain ; d.f. dorsal feeler; c. gl. cement gland ; cl. cloaca ; c. I, 

 ciliary lobes ; c. v. contractile vesicle ; e. eye-spot ; int. intestine ; Ir. lorica ; 

 l.f. lateral feeler ; in. muscular bands ; nph. nephridial tubes ; ov. ovary ; ph. 

 pharynx; st. stomach; t. tail; tr. d. trochal disc; vt. vitellarium. (After 

 Hudson and Gosse.) 



The latter, which is situated at the extremity of the body most remote 

 from the trochal disc, is frequently divided by a series of freely-movable 

 joints into a number of tubular segments like the parts of a telescope. 



N 2 



