INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 611 



NoTOMASTUS FiLiFORMis Yerrill, sp. nov. (p. 342.) 



Body very long and slender, filiform, composed of very numerous 

 sliort segments. Head very changeable in form, usually long, conical, 

 and very acutely pointed. Proboscis smooth, obovate, or trumpet- 

 shaped, when extended, and bright red. In the anterior region there 

 are eleven setigerous segments, which bear small fascicles of slender 

 setre in both rami, those in the first five longer and acutely pointed ; 

 these segments are short, biannulate; the lower fascicles of setae are 

 largest and fan-shaped. In the middle region the segments are about 

 as long as broad. Color, pale red to bright red, often mottled with 

 whitish, and more or less yellowish posteriorly. 



Length, 100"™; diameter, V'''^ 



Great Egg Harbor, low-water to one fathom, in sandy mud; New 

 Haven; Watch Hill; Vineyard Sound. 



Sabellaria vulgaris Yerrill, sp. nov. Plate XYII, figs. SS, SSa. 



(p. 321.) 



Body rather stout, thickest anteriorly, tapering backward to the base 

 of the long, slender caudal appendage. Two slender, red, oral tentacles 

 arise near the mouth, between the bases of the operculigerous lobes, 

 and, when extended, reach beyond the bases of the opercula. A single 

 median lanceolate process also arises between the operculigerous lobes. 

 A deep emargination exists on the ventral side, back of the mouth; on 

 each side of this the front margin of the segment is prolonged into a 

 tridentate lobe, the teeth or lobes being unequal, tbe inner ones largest, 

 the middle ones more slender and acute, the outer one smallest and 

 shortest; beyond these, toward the sides, there is another small acute 

 process; two conical processes also project forward from ^the lateral 

 margins, and also a fascicle of setoe. The ciliated prehensile cirri, or 

 tentacles, are long and slender when extended, and reach considerably 

 beyond the opercula. The set?e composing the opercula are golden yel- 

 low; the outer circle white at base. A row of small conical papillae 

 surrounds the bases of the opercula. Branchiae long, lanceolate, acute, 

 longer than the diameter of the body. Color of body yellowish flesh- 

 color, or pale reddisb, often with two rows of brown spots along the 

 ventral surface; operculigerous lobes whitish or grayish, specked with 

 blackish; branchiae reddish or yellowish, with a red central line, often 

 with a greenish tinge, or red centered with green ; tentacles pale flesh- 

 color, sometimes i)urplish; opercula blackish or grayish on the anterior 

 surface, golden yellow on the sides, white at base ; caudal process pale 

 red or flesh-color. 



Length about 25™"^, exclusive of caudal process; 2'"^^ to 2.5'^"^ in diam- 

 eter. 



Great Egg Harbor, Xew Jersey, to Xew Haven and Vineyard Sound ; 

 low-water to ten fathoms ; very common. Eggs are laid in May and 

 June. 



