FAUNA CANADENSIS. 497 



by its much smaller size and paler colour, as well as by tlie broader 

 and less attenuated form of its anterior extremity. On the other 

 hand, C. niodesta is described as reaching the length of an inch and a 

 half in extension, being "pale purplish brown or purplish llesh-col our, 

 with minute specks of brown, and very small round spots of a dull 

 yellow, and often of a light green." The anterior portion of tlie body 

 also is very slender and attenuated. Much stress can not, perhaps, 

 be laid upon the differences in color, but the other distinctions appear 

 to have a specific value. 



Hab. — Common in from one to three fathoms, mostly adhering' to 

 aquatic plants, but also found on pebbles or dead shells, 



3. RepTielis lateralis, Say, sp. (?) 



The original specimens on which this species was founded were 

 originally obtained by Say from the waters between Rainy Lake and 

 Lake Superior, and were named by him Hirudo lateralis (Long's 

 Second Expedition, Vol. II., p. 267, 182 Jf..) They were subsequently 

 referred to the genus JSfephelis, by Prof. Verrill (Amer. Journ. Science 

 and Arts, II., J)- 451)- Say described the species as being of a livid 

 colour, with a rufous line along each side and a few very j-emote 

 minute black points, the ocelli being six in number, and placed In a 

 regularly curved line. 



The specimen which Was obtained in Lake Ontario, and which I 

 have dotibtfully regarded as a young example of this species, was 

 about an inch in length when at rest. The colour in life was a liver- 

 brown, not exhibiting any lateral lines. In the specimen preserved 

 in spirits the ocelli can not be made out. Our example, however, 

 agrees with those described by Verrill in being slender and some- 

 what rounded in front, ^vith rounded lateral margins, and having the 

 posterior portion of the body somewhat depressed. 



Hab. — A single specimen was di'edged in Toronto Bay in a depth 

 of three fathoms. 



4. Heplielis vermiformis, Nich. 



A small wormdike leech of a red colour during life. Length 

 about half an inch in contraction and one inch in extension ; the 

 greatest width about one line. The body slightly narrower anterioi'ly 

 than posteriorly. Acetabulum oval, oblique, as wide as the body. 



