62 U.S. NATIONAL MUSEUM BULLETIN 227 



up in a ball, the long diverging notosetae sticking out in all directions, 

 then straightens out slowly. Moves with a sluggish snakelike motion. 



Material examined. — Maine (U.S. Fish Commission Station 66, 

 Gulf of Maine, 65 fathoms, 1874; Station 16b, Jeffrey's Bank, 79 

 fathoms, 1873; Bache Station 3b, 8 miles south of Monhegan Island, 

 43°38' N., 69°17' W., 64 fathoms), Massachusetts {Albatross Station 

 2091, 40°01' N., 70°59' W., 117 fathoms; Georges Bank, 44-191 

 fathoms), Florida (Seahorse Key, September 1960, T. Hopkins). 



Distribution. — -Widely distributed along west coast of Norway 

 and Sweden, Denmark, Iceland, Shetlands, Gulf of Maine to south of 

 Long Island Sound, Gulf of Mexico (Florida). In 20 to 600 fathoms. 



Family Euphrosinidae ( = Euphrosynidae) 



Body short, elliptical, with few segments (less than 40). Ventrum 

 flat, dorsum more or less convex and bristly, formed by elongated, 

 ridgelike, transverse setigerous notopodia with numerous spinelike 

 notosetae nearly covering the dorsum. Prostomium (fig. 14,a,6) 

 wedged between anterior segments, narrow, elongated, folded over 

 anterior end, thus partly dorsal and partly ventral; dorsal part with 

 2 eyes lateral to median antenna, with a crestlike nuchal organ or 

 caruncle extending posteriorly on some anterior segments and provided 

 with longitudinal ciliated bands; ventral portion with 2 smaller eyes, 

 two antennae lateral to eyes, a pair of large rounded, cushionlike 

 palps just anterior to mouth; mouth surrounded by first 5 segments. 

 Anal cirri a pair of short, oval, cushionlike lobes, surrounded by the 

 posterior segments as seen ventrally (fig. 14c). 



Parapodia (fig. 14d) biramous, with rami crestlil^e and indistinct, 

 only slightly projecting. Notopodium a wide transverse ridge with 

 2 short digitiform dorsal cirri, one on inner side of lobe (inner dorsal 

 cirrus) and the other about the middle of the lobe (outer dorsal cirrus) ; 

 with numerous spinelike notosetae in several transverse rows, usually 

 with several branchiae in a single transverse row posterior to the 

 notosetae. Notosetae brittle, hollow, bifurcated, with one branch 

 shorter than the other (may be in the form of a short lateral spur, 

 fig. 14e). Neuropodium with unequally bifurcated neurosetae and a 

 ventral cirrus posterior to the setae. 



Includes creeping forms. When animal curls ventrally, setae stick 

 out, giving the animal the appearance of a bur or a little porcupine. 

 Proboscis elongated, cylindrical, unarmed. 



Contains onlj^ one New England genus. 



