ANNELIDES. 143 



transverse muscle passes from the rectum to the opposite side of the body, 

 iind the rectum is attached to the adjacent wall by a large bundle of 

 muscular fibers. Muscles of the body -wall form a continuous layer, with- 

 out distinct fascicles. 



NEMEKTESTA. 



Amphiporus Stimpsoni Verrill. 



Ommatoptea Stimpsoni GIRARD, in Stimpson, Invert, of Grand Manan, p. 28, fig. 

 18, 1853. 



Gravel beach, low-water, Cumberland Gulf, June 1, 1878, lot 663. 

 " Color, deep purplish brown above, lilac beneath." Also from reef in 

 Penny Harbor, October 5, 1877, lot 222. 



Amphipoms, sp. 



Body thick, depressed, somewhat tapered to both ends, 25 mm to 35 mm 

 long, as contracted in alcohol. Head with a small roundish cluster of 

 minute ocelli on the pale antero-lateral margins. Neck with a slightly 

 marked transverse groove, converging backward in form of a Y, on the 

 dorsal surface. Color, in alcohol, dark bluish green ; the under surface 

 and margins of head yellowish white. Tn life, "bright pea-green." 



Penny Harbor, Cumberland Gulf, lat. 66, October 4, 1877, lot 225. 

 Arctic Island, low- water, September 13, 1877, lot 66. 



