132 



K. J. Bush — Marine Gastropods referred to 



Sculpture 



Lissospira striata sp. nov. 

 Figures 5, a. 



Fig. 5. One live specimen, station 2213, off Mar- 



tha's Vineyard, in 384 fathoms, 1884, 



Shell consisting of about three convex 

 whorls forming a comparatively low, some- 

 what depressed spii-e. The entire surface be. 

 low the relativel}'' large, little raised, smooth 

 nuclear whorl, is covered with raised, round- 

 ed, well-separated, revolving microscopic threads, most distinct on 

 the base. Umbilicus small, scarcely more than a chink. Aperture 

 and operculum typical. 



Greatest width, about 2">™ ; height, about 1-5'"'". 

 This species, in general form and sculpture, resembles Gyclo- 

 strema {=z Lissospira) T^^7/e^ Friele (Den. Nor. Nord.-Expd. 1876-78, 

 xvi, Moll, ii, p. 34, pi. xi, fig 19, 1886), but that is a much smaller 

 species with larger umbilicus. 



Lissospira cingulata (Yerrill). 



Cydostrema cingulatum Verrill, these Trans., vi, p. 198, pi. xxxii, fig. 14, 1884 

 (now Philippi wee Dunker); Expl. Albatross, Report U. S. Com. Fish and Fisheries 

 for 1883, p. 569, 1885. 



Cydostrema Verrilli Tryon, Manual of Conchology, x, p. 90, pi. 31, fig 46, 1888. 



Cydostrema cingulatum. Dall, Bull. U. S. Nat. Mus., No. 37, p. 166, 1889. 



One specimen (No. 38100), station 2048, off Martha's Vineyard, in 

 547 fathoms, 1883. 



As this species was erroneously referred to Cydostrema, I do not 

 adopt Tryon's specific name Verrilli for it. 



Lissospira (?) convexa sp. nov. 



A much mutilated, live specimen, station 2233 off Delaware Bay, 

 in 630 fathoms, 1884. 



Shell very fragile, consisting of four regularly increasing, very 

 convex whorls, forming a high spire with abnormally relatively 

 large, prominent, somewhat twisted, nuclear whorl. Suture very 

 deep, umbilicus round, of good size, deep, with rounded walls. 

 Aperture somewhat circular but modified by the body-whorl, to 

 which the simple, continuous peritreme is attached for a consider- 

 able distance; columellar margin very straight, angulated at its 



