PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 183 



Pharynx provided with numerous teeth in longitudinal rows, each with 

 a whitish, slightly curved, acute, central denticle. Intestine brown, 

 scarcely longer than the body. Proboscis whitish or pale flesh-color; 

 body and caudal appendage yellowish. Largest seen were about 15""^ 

 long and 2"^"^ in diameter. Described from life. The form of the body 

 and proboscis continually changes. 



Massachusetts Bay, off Plymouth, 27 fathoms, soft mud; Harbor do 

 Luth, Campo Bello Island, Bay of Fimdy, 4 to 5 fathoms, soft mud 

 (U. S. Fish Commission, July 30, 1872). 



Thalassenia viridis, sp. uov. 



A small bright green species with swollen body and long slender 

 proboscis, somewhat spoon-shaped at the end. Body round, thick, 

 about twice as long as broad, largest and obtusely rounded post(#iorly ; 

 the surface is minutely grainilous in appearance, the granules in circu- 

 lar lines ; anteriorly the body rapidl}^ narrows to the base of the probos- 

 cis, where there are two small spines at the mouth. The proboscis is so 

 infolded at the edge as to form a groove, like a spout, which expands 

 near the end ; it is longer than the body. Color bright grass-green. 

 Length of body, about C""^. Described from life. 



Off Head Harbor, Campo Bello Island, 77 fathoms, mud, 1872. Found 

 in holes in hard nodules of blue clay. 



NEMERTINA. 



Amphiponis virescens, sp. uov. 



Body long, slender, tapering gradually to the tail, widest anteriorly 

 in extension. Active in its movements. Head ordinarily obtusely 

 rounded in front. Ocelli numerous, forming a very long lateral cluster 

 on each side of the head ; anteriorly each cluster consists of several 

 rows, but it narrows backward to a single row, which extends back 

 beyond the head and neck. Color clear pale green, varying in tint. 

 Length of largest specimens seen, about 40"^'". 



New Haven and Noank, Conn. ; Wood's Holl, Mass., etc. Common 

 among hydroids on the piles of wharves. 



Amphiporas agOis Vcrrill {:^Opliioncmcrtcs o^tZ/s Verrill, Am. Jotir. Science, vii, p. 45, 

 pi. 7, fig. 1). 



This species belongs to Amphlporus, as characterized by M'Intosh. 

 It has only been taken in 20 to 00 fathoms, oft^ the coast of Maine. 



Amphiporas roseus Yerrill {—Planaria rosea Miiller). 



The species which I thus identify is common in Massachusetts Bay 

 and the Gulf of Maine, on muddy bottoms, in 20 to 100 fathoms. It 

 agrees well with the original figures and descriptions, but does not agree 

 with A. jnilclier, to which JM'Intosh refers Miiller's species, erroneously it 

 seems tome. The color above is usually deep cherry-red to reddish 

 brown, varying toward orange aud chocolate-brown ; beneath, flesh color. 



