102 PROCEEDINGS OF THE NATIONAL MUSEUM vou 70 



LASKEYA (ONCHODIA) PETALA, new species 



Shell small, slender, acute, whitish, with 1 glassy swollen nuclear 

 whorl, and 1 nepionic whorl with fine vertical riblets with wider inter- 

 spaces, succeeded by 12 flat-sided whorls with adult sculpture; suture 

 closely appressed, inconspicuous; the sculpture consists of 3 minutely 

 crenate spirals intersected by fine inconspicuous axial tlireads, not 

 forming ribs; the sides of the spire are flattish, the base is only 

 slightly convex, smooth except for flexuous incremental lines; the 

 aperture is subquadrate, the pillar short and strongly twisted, the 

 outer edge prominent like a plait. Height, 5; diameter, 1.1 mm. 

 U. S. Nat. Mus. Cat. No. 108350. 



Off Georgia, not uncommon. 



The conspicuous edge of the twisted pillar is the most obvious 

 character of this species. Some of the less perfect specimens are 

 larger than the one serving as type. 



LASKEYA (ONCHODIA) LEIPHA, new species 



Shell small, slender, whitish, with a translucent white inflated 

 nucleus of a whorl and a half, and 12 or more slightly convex subse- 

 quent whorls; suture distinct, slightly constricted; axial sculpture of 

 (on the last whorl about 15) equal, nearly straight smooth riblets, 

 with equal or slightly wider interspaces extending from suture to su- 

 ture; sph'al sculpture obscure, of numerous fine striae and on the 

 later whorls two or three small threads, of which one on each side of 

 the periphery is more prominent; base moderately rounded, smooth 

 except for incremental lines, the margin almost carinate, while the 

 ribs stop abruptly behind it; aperture rounded quadrate, canal short. 

 Length of largest specimens 10; maximum diameter, 2 mm, U. S. 

 Nat. Mus. Cat. No. 108360. 



Off Georgia and Fernandina, about 20 specimens. 



Except for its swollen and dextral nucleus, this species closely 

 resembles a Chemnitzia. 



Subgenus Stilus Jeffreys 



Stilus Jeffreys, Proc. Zool. Soc. London, for 1885, p. 52. Type Stilus in- 

 xignis Jeffreys, Proc. Zool. Soc. London, for 1885, p. 52, pi. 6, figs. 1, la, 

 16, 1885. North Atlantic. 



The characteristic of this genus is the slender pointed apex of the 

 larval whorl. It was regarded as a genus by Jeffreys but, as I find 

 in Laslceya apicina a stage intermediate between typical Stilus and 

 Laskeya, I have preferred to regard the group as subgeneric. 



STILUS \ITREUS, new species 



Shell small, vitreous white, with an apical short upturned spur 

 seated on a turban-shaped nepionic whorl, larger than the succeeding 

 whorl, and sculptured with about 14 strong axial ribs; there are 9 well 



