496 FAUNA CANADENSIS. 



body being semi-transparent. The gullet is distinct, and leads into 

 a mucli sacculated stomach, which is very conspicuous from its dark 

 color (Fig. 2, c). The annulations of the body are very distinct, and 

 the integument is finely tuberculated or papillose. 



This extraordinary habit of carrying the young has been noticed 

 by Prof. Verrill, in another species of Glepsine (Amer. Journ. Science 

 and Arts, III., Feb., 1872) ; but I am not aware that attention has 

 otherwise been drawn to it. 



In my " Preliminary Report," (Annals of Natural History, Oct., 

 1872,) I referred this species to the genus Nephelis, but it is more 

 satisfactorily placed under Glepsine. 



Hah. — Common in from two to three fathoms, adhering to stones 

 or to the shells of Unio crassidens. 



2. Clef sine siib-modesta, Nich. 



Length in contraction, one-fifth of an inch; in extension, one-quarter 

 to one-half of an inch. Body a long oval, attenuated in front when 

 extended, convex above, concave or flattened below. Back smooth. 

 Two minute black ocelli carried upon the top of the head. The 

 margins of the body exhibiting broad transparent papillose margins, 

 the rest of the body being of a light, dirty, greenish-brown coloui\ 

 (The preserved specimens are nearly white.) Behind the head, in 

 the middle line of the back, is placed an auditory vesicle or " cervical 

 gland," in the form of a rounded, slightly prominent, chestniit brown 

 spot. Sometimes there are two of these, the smaller being placed a 

 little behind the other (Fig. 3). 



The habits of this species are very similar to those of G. patelli- 

 formis. It carries its young attached to the posterior portion of the 

 ventral surface in a bunch or cluster, and it rolls up into a ball when 

 irritated. The attached young are about a line in length, of a pale 

 whitish-brovfn colour, semi-transparent, and showing the broAvn line 

 of the alimentary canal. 



Fig. 3. — Clepsine sub-modesta, Nich. — a. Outline of adult viewed from above 

 enlarged, b. Side view of adult, enlarged, showing the attached young. 



This species is neai'ly allied to Glepsine modesta, Yerrill (Amer. 

 Journ. Science and Arts, III.. Feb., 1872) ; but it is distinguished 



