BRADA VERRUCOSA. 399 



Locality. Atlantic Coast: Between Cape Hatteras and Nantucket. Sta. 

 2291 (lat. 35° 25' 30" N., long. 75° 20' 30" W.). Bottom of broken shell and 

 grey sand. Depth 15 fms. 20 October, 1884. Two specimens. 



This species is common on the North Atlantic Coasts of Europe and America, 

 where it is often found between tide-marks. It also occurs in the Bering Sea 

 and American Coast of the Northern Pacific. 



Brada Stimpson. 



Invertb. Grand Manan, 1853, p. 32; McIntosh, British annelids, 1915, 3, pt. 1, p. 103. 



Brada verrucosa, sp. nov.^ 

 Plate 68, fig. 3-6. 



Body subclavate, being widest at about one fourth the length from the 

 anterior end, and then narrowing conspicuously into a slender posterior region. 

 Most slender a little distance in front of the caudal end, which may be somewhat 

 spatulate. One specimen 60 mm. long has a maximum width of 6.5 mm. and a 

 minimum diameter in the posterior region of 2.5 mm. The segments in the 

 anterior and middle regions of the body do not vary much in length, but in the 

 caudal fifth, or thereabouts, they decrease decidedly caudad and at the end are 

 very short and crowded. The dorsal surface is strongly convex, as usual, while 

 the ventral is complanate and over the caudal nine or ten somites marked by a 

 distinct median longitudinal groove. Somites forty-nine to fifty-two. The 

 maximum length in the type-specimens is about 80 mm. 



The prostomial region is retracted in the usual way, leaving the common 

 trifid opening, projecting from which in some specimens may be seen the tips of 

 the tentacles and palpi. The palpi are rather narrow, sublanceolate, contracting 

 to a narrowly rounded tip; dorsal surface smooth; ventrally with the usual 

 median longitudinal furrow, the surface on each side of this being transversely 

 folded or wrinkled. (Plate 68, fig. 3). The tentacles are slender, filiform, a 

 considerable number on each side, though it was impossible to determine the 

 number accurately. 



The papillae of dorsal surface high and stout, subcorneal, apically rounded 

 and hard, as in B. mammilata Grube. They are not arranged in regular longi- 

 tudinal series. In the anterior and middle region the tubercles arc mostly in 



' verrucosus, covered with warts. 



