402 A. E. Yerrill — Marine N'emertecms of N'eic England, etc. 



the large proboscis-sheath and proboscis can often be seen indis- 

 tinctly along the median dorsal region. 



Length, in extension, about 35 to 40""" ; diameter 2*5 to 3-5'"™. 



Length of a specimen from station 811, in 19 fathoms, 18 to 20"^"^; 

 diameter 1-25 to 2"^™. 



Proboscis large ; its armature consists of a slender central stylet 

 having an elongated, narrow, oblong or cylindrical shaft, sur- 

 rounded by a small dark-colored basal expansion. Below the stylet 

 there is a dark pigmented transverse band. Described from living 

 specimens. 



Long Island Sound, near New Haven, etc. ; Fisher's Island Sound ; 

 and Vineyard Sound, in I to 10 fathoms, not uncommon. Noank, 

 Conn., in harbor mud, IBH. Off Block I., 19 fath., sand, (Sta. 811). 



Amphiporus CaeCUS Verrill, sp. nov. 

 Nemertesf, sp. undet. (a), Invert, of Vineyard Sound, etc., p. 335, 1873. 

 Plate xxxiv, figures 2, 2a, 26, 2c. 



Body soft, oblong, flattened, obtuse at both ends, the edges 

 rounded. Head not distinctly separated from the body and of the 

 same breadth ; a faint whitish groove crosses the neck, receding in 

 the middle above, and extends around on each side to the ventral 

 surface, on which it advances in the middle, or runs directly across, 

 according to the state of contraction. No ocelli. The cephalic 

 ganglions can usually be seen through the integument of the head, 

 especially on the lower side, as reddish spots. 



Color bright orange-red; lighter orange-yellow along the sides; 

 usually with a median dorsal stripe of darker red. 



Length, in extension, 35 to 40™"'; diameter 2*5 to 3™"\ Described 

 from living specimens. 



North of Block Island, 18 to 20 fathoms, Aug. C, 1874. 



Amphiporus CSeCUS Young. 



Body verj' slender. Head acute. Ocelli none. Proboscis with a 

 central stylet having a narrow oblong shaft and expanded base, 

 much as in that of A. ochraceus; lateral stylets not obsei'ved, per- 

 haps wanting. 



Color pale yellowish white, with the head red. 



Length about 6 to 7"^™. 



Station 812, in 28 fathom.s, sand. Off Block Island, 1880, 



