'*^l89i!' ] PROCEEDINGS OF THE NATIONAL MUSEUM. 297 



which has apparently not been observed in other species of this genus. 

 The dorsal* fascicles above the bands of unncini contain about lifty set?e 

 and are closely approximated dorsally on the anterior segments farther 

 apart posteriorly. Bands of uncini nearly meet ventrally on the anterior 

 segments and are there com i)osed of twenty-five vertical rows of hooks. 

 Each uncinus has two eipial teeth. Length up to 50 millimetres ; diame- 

 ter,."5 millimetres. Color, light reddish; tentacles variously marked with 

 white, red, and green. 



It constructs elegant cylindrical tapering tubes often 15 centimetres 

 long and (I millimetres in diameter, which are covered with worn dis- 

 colored fragments of shells, densely packed and generally set at an 

 angle to the axis of the tube. The tubes stand buried in the sand. 



These Annelids in their tubes are not uncommon in certain restricted 

 shelly areas of 15ird Shoal toward Fort Macon, where scarcely uncovered 

 by the tide. The excrement is discharged as cylindrical masses half the 

 length of the body, composed of excessively tine sand held together by 

 mucus. 



Family HEKMELLID.E. 



SABELLARIA Lamarck. 



Sabellaria vulgaris Vonill. 



Sabtllaria vulgaris Yerrill. Invert. An. Vineyard Sd., pp. 321, 611, PI. xvii, Figs. 86, 

 88a ; Notes on Nat. Hist, of Ft. Macon (Cones and Yarrow), >Proc. Acad. Nat. Sci. 

 Phila., 1--78, pp. 290, 300; New England Annelida, part 1, p. 318. 



Sabtllaria varians Webster. Anncl. Ch;i't. Virijinian Coast, p. oH, PI. ix, Figs. 133- 

 137 ; PI. X, Figs. 137-139. 



This Annelid is common on shells, etc., in a few fathoms of water. 

 The females are colored brilliant purplish by the mature eggs, and the 

 smaller males dull white when distended with spermatozoa. The eggs 

 are easily fertilized artificially, but develop with many individual irregu- 

 larities and abnormalities. The cleavage is not like that figured recently 

 by von Drasche for a European species of iSabcllaria. 



Family AMPIIICTENID.E. 



PECTINARIA Lamarck. 



Pectinaria gouldii N'l'rrill. 



Cistenides gouMii Verrill. Invert An. Vineyard Sd., pp. 323, 612, PI. xvii, Figs. 87, 



87a. Proc. Acad. Nat. Sci. Phila. (Cones and Y.arrow), 1H7S, p. 300. 

 Cintenidcs gouldii Wkhster. Aniici. Cbii't., Provincetown, p. 731. 

 I'ectinaria gouldii Verrill. New England Annelida, part 1, p. 287. 



Found occasionally in the sand near low- water mark; Shark Shoal 

 and Bird Shoal. The beautiful conical tubes appear to l)e placed, nor- 

 mally, with the apex near the surface of the sand, the large orifice and 

 bead of Annelid buried deeply, but do not stand vertically. Large eggs 

 are found in the body cavitv in August. 



