286 MARGARITA. 



the umbilicus ; surface very bright, shining, polished, and smooth 

 except for fine subobsolete concentric lines around the umbilicus ; 

 spire conoidal ; apex minute but obtuse ; suture impressed ; whorls 

 about 5, convex, the last very rapidly widening, somewhat descend- 

 ing toward the aperture ; aperture rounded, oblique, angular 

 above, nacreous inside, the pearly iridescence often visible through 

 the shell ; umbilicus narrow, profound, its opening regularly 

 curved, not separated from the base by a carina. 

 Alt. 6, diani. 7 mill. ; alt. 4, diam. 5 mill. 



England, Scandinavia, New England, northward to Spitzbergen, 

 Greenland and Behring Straits. ( West America south to Washing- 

 ton Territory f) 



Turbo helicinus O. Fabr. Fauna Groenland., p. 393. — Margarita 

 helicina, Moller, Ind. Moll. Grcenl., p. 8.— Loven, Ind. Moll. 

 Scandin., p. 20.— Gould (Binney's ed.), p. 281, f. 542.— Sars, 

 Moll. Eeg. Arct. Norveg., p. 132, t. 21, f . 3 ; t. iii, f. 7, 8 (denti- 

 tion). — SowERBY in Reeve, Conch. Icon., f. 15. — Trochus helicimis 

 Forbes & Hanley, Hist. Brit. Moll, ii, p. 531, t. 68, f 4, 5 ; t. 74, 

 f. 10 ; t. 200, f. 4 (animal).— Jeffreys, Brit. Conch., iii, p. 295 ; v. t. 

 61, f. 4.— Philippi, Conchyl. Cab., p. 250, t. 37, f. 10.— TV. 

 neritoideus Gm. teste Forbes & Hanley. — Turbo margarita 

 Montagu, Test. Brit. suppL, p. 143. — Turton, Conch. Diction., p. 

 229. — Lowe, Zool. Journ. ii, p. 107, t. 5. f. 10, 11. — Helix margarita 

 Laskey, Mem, Werner Soc. i, p. 408, t. 8, f. 5. — Fleming, Encyc. 

 Edin., t. 203, f. 9 {teste F. & H.). — Trochus margarita Philippi, 

 Conchyl. Cab., p. 248, t. 37, f. 7.— Brown, Illust. Conch. Gt. Brit., 

 p. 17, t. 10, f 28, 29. — Margarita vulgaris Leach, mss. in Sowerby, 

 Mai. and Conch. Magazine, p. 24. — Sowerby, Conch. 111. Mar- 

 garita, f. 13. — f Margarita arctica Leach in Ross's Voyage of 

 Discovery of H. M. S. Isabella and Alexander, to Baffin's Bay, 

 etc.. Appendix no. ii, p. 61 (first species of Margarita.'), 1819. — 

 Gould, Invert, of Mass., p. 255, f 163.— Sowb., Mai. and Conch. 

 Mag. i, p. 25 ; Conch. 111., f. 6.— Philippi, Conchyl. Cab., p. 248, t. 

 37, f. 8.— DeKay, Mollusca of New York, p. 108, t. 6, f. 1(>7.— 

 Sowb. in Rve. Conch. Icon., f. 19. — Turbo inflatus Totten, Silli- 

 nian's Journ. Sci., xxvi, p. 368, f 5. — Ma,rg. helicoides Beck MS. 

 teste Sowb. — Margarita companulata INIoRSE, Mem. Bost. Soc. IS". H. 

 i, p. 284, t. 7, f. 15.— Binney's Gould, Inv. Mass., p. 282, f 543.— 

 Tr. borealis Philippi, Conchyl. Cab., p. 283, t. 42, f. 1. — 31. arctica 



