MARGARITA. 291 



garita s^r«(^a Leach iu Appendix to Eoss's Voyage to North Pole 

 (inadequately defined, but from types, teste Forbes & Hanley). — 

 Gray, Zoo). Journ. ii, p. 567. — Turbo carneus Lowe, Zool. Journ. 

 ii, p. 107, t. 5, f. 12, 13 ; Brit. Mar. Conch., p. 170. — Margarita 

 carnea Sowb. Mai. and Conch. Mag., p. 25 ; Conch., Illust. f. 9. — 

 Brown, Conch. G. Brit., p. 17, t. 10, f. 36, 37. — Trochus groiilandi- 

 cus umbilieatus, etc., Chemnitz, Conchylien Cab., v, p. 108, 1. 171, f. 

 1671 (1781), (not binomial). — T. grcenlandicus Chem. Jeffreys, 

 Brit. Conch, iii, p. 298, t. 61, f. 5. — (not T. gronlandicns Chem. 

 Philippi, Conchy]. Cab., p. 247, t. 37, f. 5, a form probably equaling 

 M. helicina or M. umbilicalis). — Margarita grdnlandica Sars, Moll. 

 Reg. Arct. Norvegise, p. 133, t. iii, f. 9 (Dentition). — M. sulcata Sowb. 

 Mai. and Conch. Mag. i, p. 26 ; Conch. Illust., f. 1. — Sowb. in Reeve, 

 Conch. Icon., f. 3. — Trochus rossii, Phil., Conchyl. Cab., p. 288, t. 

 42, f. 9. — M. grmnlandica Chemn. Leche, Kongl. Sw. Vetensk. 

 Akademiens Handlingar, xvi, p. 40. 1878, and var.s. rudis, kevigata 

 Morch, intermedia nov. (Nova Zembla). — M. undidata Sowb. MiD- 

 dendorp'F, Mai. Roj^sica, ii, p. 72. — T. cinerareus O. Fab. Fauna 

 Groenl., p. n92.— T.fabricii Phil., Conchyl. Cab., p. 284, t. 42, f. 2. 

 The spiral riblets are much finer and more numerous than in M.. 

 cinerea. Jeffreys describes var. albida, shell whitish ; var. dilatata, 

 more depressed and expanded at the sides, encircled on the upper 

 part by only a few spiral strise or impressed lines ; var. Icevior 

 smaller, more conical, solid and glossy, quite smooth with the excep' 

 tion of one or two slight spiral ribs on the uppermost Avhorls, flesh 

 color. The M. undulata is a common species in collections; I have 

 seen numerous specimens of the form nearly smooth beneath. The 

 subsutural folds are often obsolete or nearly so. Sowerby's M. sul- 

 cata is figured on pi. 39, fig. 60. Philippi's poor figures of T. rossii 

 (=8ulcata Sowb. teste Phil. !) are given on pi. 39, figs. 40, 41. 



The T. cinerareus Fah. , fabricii Phil., is figured on PI. 39, figs. 

 53, 54. It is probably a variety. 



M. cinerea Couthouy. PI. 44, figs. 20 ; pi. 60, fig. 29 ; pi. 44, fig. 

 25 ; pi. 37, fig. 5. 



Shell umbilicate, conical, thin, cinereous or brownish colored; 

 surfiice lusterless, finely, sharply densely obliquely striate, spirally 

 Urate ; the lirse are coarse and unequal, 2 to 4 being more prominent 

 on the upper surface, those on the base are decidedly smaller, closer. 



