A. E. Verrill — Marine Nemerteans of New Em/land, etc. 429 



iisually distinctly larger than the others. Color, above, usually 

 clear bright red, varying to dark red and reddish brown, rarely to 

 greenish brown ; often crossed l)y indistinct, transverse, pale lines, 

 as in Linens viridis ; front and margins of head white ; under sur- 

 face light flesh-color or pinkish, often showing by translucency the 

 intestinal creca or pouches along the sides in the form of transverse 

 gray blotches. 



Length up to 125 to 150""" ; diameter, 2 to 4"'"\ Described from 

 life. 



Very common from off Cape Cod and Massachusetts Bay to Nova 

 Scotia, in 8 to 150 fathoms or more, on shelly and stony bottoms. It 

 is particularly connuon in the Bay of Fundy, the harbor of Eastport, 

 Me., and the other cold waters of that region, where it is also often 

 found at low-water mark under stones. It has also been frequently 

 dredged in 12 to 50 fathoms south of Cape Cod, and off Nantucket 

 and Martha's Vineyard, i?i tlie cold area. 



This species, in some of its red and brown varieties, closely resem- 

 bles the red and brown varieties of lAneus viridis, from which it 

 cannot be distinguished when living without a careful examination. 

 The presence of the caudal cirrus is easily diagnostic, when the 

 specimen is perfect, but when mutilated, as often happens, the dif- 

 ficulty is much increased. The ocelli in this species are usually 

 larger and more distinct than in Lineus viridis. 



Micrura dorsalis Veniii, sp. nov. 



PLATE XXXViri, FIGURES 4, Ail. 



Body depressed, rather large and thick, length up to 6 inches in ordi- 

 nary extension ; in contraction it becomes short and thick, and may 

 even contract itself into a ball ; the margins are well rounded and the 

 body tapers toward both ends. The anterior region of the body for 

 about a sixth to a tenth of the whole length, often becomes in par- 

 tial contraction rounded and narrower than the rest of the body. 

 Head obtusely pointed or bluntly rounded in front, not distinct 

 from the body and of the same breadth. Cephalopori moderately 

 long, somewhat oblique longitudijial slits on the sides of the head, 

 extending nearly to the proboscis-pore. Ocelli, none. Mouth small, 

 rounded, nearly opposite the hind end of the cephalopori. 



Color pale ocher-j'ellow with an orange tinge anteriorly, with a 

 darker medial stripe above and below, and having pale mottlings in- 

 distinctly showing through on each side due to the internal organs. 



Length 160'""^; diameter 5""". Described from life. 



