INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 587 



ing out opposite tbe eyes, tlieu uarrowing to near the autenuie, where 

 there is a slight coustrictiou, and expanding slightly at the end, which 

 is obtusely rounded. Eyes very large, brown, wide apart, and sub-lateral, 

 connected by a curved baud of brown specks; auteunte rather large and 

 long, about one-third aslong as the head. Tentacular cirri large, the two 

 posterior much the longest, reaching to about the eighth setigerous seg- 

 ment. Branchia' of anterior segments broad oval or sub-circular, rounded 

 at the end ; posterior ones larger, broad oval, narrowed to the end. Pro- 

 boscis with a large, swollen, basal portion, on which are twelve longi- 

 tudinal rows of large, prominent, obtuse papillie, about seven in each 

 row; and a terminal smooth portion, which is somewhat longer, and 

 about as broad at the end as the basal portion, but considerably narrower 

 at its commencement ; the orifice is surrounded by a circle of large, 

 rounded papilla?. Color greenish, with a median dorsal row of dark 

 brown spots, and another less conspicuous row along each side of the 

 back, at the base of the lateral appendages. 



Length up to 75™™; breadth, 1 to 1.25""". 



Watch Hill, Ehode Island, in 4 or 5 fathoms, rocky bottom. 



The figure (56) copied from one of those given by Mr. Agassiz does 

 not agree perfectly with the specimens described, but probably represents 

 the same species. The head, as figured, is more oblong and the eyes 

 nearer together than in my specimens; the tentacular cirri are less 

 crowded. The anterior ones, in the preserved specimens at least, appear 

 to arise from beneath the base of the head. Some of these differences 

 may be due to the different states of extension and contraction ; for the 

 species in this family are all quite changeable in form during life, and 

 usually contract very much in alcohol. 



PitYLLODOCE cateS-ula Verrill, sp. nov. (p. 49-1.) 



Head somewhat longer than broad, slightly cordate posteriorly, with 

 the posterior angles well rounded, and the sides full and convex ; front 

 broadly rounded, and with a slight emargiuation in the middle. Eyes 

 large, dark brown, placed on the dorsal surface of the head; antenna3 

 rather long, slender. Tentacular cirri long and slender, the two posterior 

 much longer than the others. Brauchiw of anterior segments broad 

 ovate, with rounded tips ; farther back larger and longer, ovate, leaf-like, 

 with acuminate tips. Proboscis with twelve rows of papillie on the 

 basal portion, which are prominent, somewhat elongated, obtuse, seven 

 or eight in the lateral rows, those in each row close together. Color of 

 body and branchiie pale green, with a median dorsal row of dark brown 

 spots, one to each segment; and two lateral rows, in which there is a 

 spot at the base of each " foot ;" head pale, or greenish white. 



Length up to 75'""; breadth about 1.5""". 



\yatch Hill, Ehode Island, in 4 to C fathoms, among rocks and algffi, 

 and in tide-pools; Wood's Hole, at surface, evening, July 3. Very 

 common in the Bay of Fundy, from low-water to 50 fathoms. 



