230 PUNCTURELLA. 



Length 7, breadth 5], alt. \\ mill. 



Circumpolar ; southward to Cape Fear (in deep water) ; to Scar- 

 borough, England ; to Corea and northern Japan; to Puget Sound, 

 West America. In the Southern Hemisphere, off Marion Island, 69 

 fins.; off Prince Edivard's Island 310 fins.; Kerguelen, 60 fins. ; 

 Strait of Magellan. 



Patella noachina L., Mantissa, p. 551. — Puncturella noachina 

 Lowe, Zool. Journ. iii, p. 78, 1827, and of authors generally. — 

 Cemoria princeps Mighels, Proc. Bost. Soc. N. H. 1841, p. 49. — 

 Rimida galeata Gould, U. S. Expl. Exped. p. 369, t. 31, figs. 476, 



477. 



A very widely distributed species, of a more erect elevated form 

 than its allies. 



Var. galeata Gould. PL 42, figs. 62, 63, 64, 65. 



Rather heavier and larger ; buttresses of the internal septum strong, 

 forming a deep pit on each side of the hole-channel ; a groove 

 running downward from the hole inside. 



Length 10*, breadth 8f, alt. 6} mill. 



Puget Sound. 



P. fastigiata A. Adams. PI. 63, figs. 31, 32. 



Whitish, elevated-conical, shining, the acuminate vertex involute; 

 having radiating equal, equidistant riblets, interstices flat with con- 

 centric striae of growth. Fissure lanceolate; aperture oval, margin 

 crenulated, septum deeply arcuate, transverse, simple. (Ad.) 



Eastern Seas. 



P. fastigiata Ad., P. Z. S. 1851, p. 228. — Cemoria fastigiata Ad., 

 Thes. p. 208, f. 15, 16. — Sowb. in Conch. Icon, xix, f. 4. 



P. cognata Gould. PI. 42, figs. 70, 71 . 



Shell small, conical, with the apex curved and the surface orna- 

 mented with radiating ribs of nearly uniform size ; aperture rounded- 

 oval. Color ashy-white. (Old.) 



Orange Harbor, in 16 fms. 



Compare P. noachina. 



P. conica Orbigny. PI. 63, figs. 40, 41. 



Shell oval, much elevated, conic, thin, white, ornamented with 

 alternately larger and smaller ribs, one in front larger than the 



