336 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM, 



suture little oblique, impressed, or subcanaliculate. Aperture narrowly 

 contracted posteriorly, narrow ovate anteriorly; outer lip little convex, 

 slightly produced anteriorly; columella excurved, flattened, with no 

 fold nor tooth. Sculpture delicate, incised, spiral grooves, separated by 

 wider intervals, and covering the anterior two-thirds of the body- whorl, 

 extending a little back of the aperture, but mostly absent on the pre- 

 ceding whorls. No umbilicus. 



Length, 5™™; breadth, 2.5'"^>; length of body- whorl, 3.5 ">■"; of aper- 

 ture, 2.o"'°>; its breadth, 1™'". 



Off iN^ewport, R. I., station 892, in 487 fathoms, 1880. 



oS^amed for Mr. H. L. Bruner, an assistant, during the season of 1881, 

 in the concholugical work of the Fish Commission. 



TECTIBRANCHIATA. 



Actfvon nilidns Verrill. 



Juriculhia xnsculpta Verrill, these Proc.,iii,p. 381, 1880 («ow Moat., sp.) 

 Actwon nitidus Verrill, Trans. Conn. Acad., v, p. 540, pi. 58, fig. 21. 



Shell small, white, translucent, glossy, elongated, apex obtuse.. Nu- 

 clear whorl rather large, regular. Whorls six, flattened at the periphery, 

 gradually increasing, slightly roundly shouldered. Sculpture delicate, 

 wavy, incised spiral lines, more distant and distinct on the anterior 

 part of the body-whorl, becoming finer, closer, and more wavy behind 

 the middle, obsolete near the suture, except one fine subsutural groove ; 

 suture impressed or slightl3' canaliculate. Aperture narrow-ovate, much 

 contracted posteriorly, a little produced anteriorly ; columella spirally 

 twisted, the iuner edge forming a slightly raised fold. 



Length, 8'"™; breadth, 3"^"; length of body-whorl, 5.5"'"; length of 

 aperture, 3.5'"°'.; its breadth, 1.8"'"'. 



Stations 892 and 947, in 487 and 312 fathoms, 1880 and 1881, south of 

 Martha's Vineyard. 



Cyl'wlma Gouldii (Coutli.) Verrill. 



Bulla Gouldii Couihouy, Bost. Jour. Nat. Hist., ii, p. 181, pi. 4, fig. 6, 1838. 



Utriculus Gouldii Stinipson ; Gould, Invert. Mass. (ed. ii), p. 217, fig. 508. 



Cylichna Gouldii Verrill, Proc. U. S. Nat. Mus., iii, p. 383, 1880. 

 Crab Ledge, off Chatham, Cape Cod, station 973. Stellwagen's Bank, 

 Massachusetts Bay, in 15 to 25 fathoms, 1879. 



Cylichna ? Dalli Verrill. 



Trans. Conn. Acad., v, p. 542, July, 1882. 

 Shell white, somewhat thickened when full grown, translucent when 

 younger, elongated, broadest about the middle, narrowed to both ends, 

 most so posteriorly; apex with a distinct pit, showing volutions within; 

 no umbilicus; whole surface covered with fine, regular, wavy spiral 

 lines, visible with a lens. Outer lip with a free, sharp edge, rising slightly 

 above the body-whorl posteriorly, and separated from it by a deep, 

 narrow slit; it is very slightly convex and a little flaring along the 



