68 LEPETA. 



Subfamily LEPETIN^E Dall. 

 Genus LEPETA Gray, 1847. 



Lepeta GRAY, P. Z. S. 1847, p. 168. DALL, Amer. Journ. Conch, 

 v, p. 140. 



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

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



L. CTECA 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 striae, 

 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, Verh. z.-b. Ver. Wien, xxi, p. 1300. SARS, Moll. Arct. 

 Norv., p. 123, t. 20, f. 17. Patella cerea MOLL., Groenl., p. 16 

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

 1838. GOULD, Inv. of Mass., p. 152, 1841. Pilidium candidum, 

 STIMP., Sh. of New Engl., p. 29. f Lepeta franJclini 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 Oryptobranchia 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, and/, 

 c. iv, p. 412. 



