Subfamily Lepetin.!*: Dall. 

 Genus LEPETA Gray, 1847. 



Lepeta Gray, P. Z. S. 1847, p. 168. — Dall, Amer. Joiirn. Conch. 

 V, p. 140. 



Dentition of jC. cceca, pi. 40, figs. 31, 31 ; enlarged apex showing 

 spiral embryonic shell, pi. 40, fig. 32. 



L. c^CA Miiller. PI. 40, figs. 29-32. 



Shell rather straightly conical, apex erect ; front slope one-half the 

 length of shell ; surface sculptured with fine close radiating stride, 

 rendered granulous by the intersection of equally close low thread- 

 like concentric strise ; color light-brown, sometimes having a pinkish 

 tint. 



The outline is oval ; front slope nearly straight, posterior slope a 

 little convex, both often slightly concave above. The beaded sculpt- 

 ure is most developed toward the upper part of the cone. Inside 

 dirty white or pink tinged. Apex generally eroded ; basal margins 

 of shell level. Length 14, breadth 11, alt. 5 mill. 



Arctic Ocean, and North Atlantic, South to Massachusetts Bay, 

 Scotland and Denmark; Off Sea Horse Is., near Point Barrow, 

 Alaska, and North from Bering Strait. 



Patella cceca Mull., Prodr. Zool. Dan., p. 237. — Lepeta cceca 

 Gray, P. Z. S. 1847, p. 168.— Jeffreys, Brit Conch, iii, p. 252.— 

 Dall, Amer. Journ. Conch, v, p. 141 ; Proc. U. S. Nat. Mus. i, p. 

 334, 1878.— Gould, Invert, of Mass. 2d edit., p. 270, f. 531.— 

 Bergh, Verb. z.-b. Ver. Wien, xxi, p. 1300. — Sars, Moll. Arct. 

 Norv., p. 123, t. 20, f. 17.— Patella cerea Moll., Grcenl., p. 16.— 

 Patella Candida Couthouy, Bost. Journ. N. H. ii, p. 86, t. 3, f, 17, 

 1838. — Gould, In v. of Mass., p. 152, 1841. — Pilidixim candidum, 

 Stimp., Sh. of New Engl., p. 29. — f Lepeta franklini Gray, Guide 

 Syst. Dist., p. 172. 



This is a small whitish species, seen under a lens to be very dis- 

 tinctly and beautifully granulated. 



Section Oryptohranchia Middendorff", 1851. 



Cryptobranchia Midd., Sib. Reise, p. 183. — Dall, Amer. Journ. 

 Conch. V, p. 143, 1869, Proc. U. S. Nat. Mus. i, p. 334, 1878, andZ. 

 c. iv, p. 412. 



