ANOMIA. 327 



Anomia cylindrical Gmelin, Syst. Nat. p. 3349, from Schriit. Einleit. Conch, vol. 

 iii. p. 419, pi. 9, f. 13. — Turt. Conch. Diction, p. 6 ; Di- 

 thyra Brit. p. 232. — Fleming, Brit. Anim. p. 395. — Mac- 

 gilliv. Moll. Aberd. p. 232.— Brit. Marine Conch, p. 123. 

 — Brown, Illust. Conch. G. B. p. 70, pi. 22, f. 7, 8. — 

 Dillw. Recent Shells, vol. i. p. 291. — Index Testaceolog. 

 pi. 11, f. 13. 



„ margaritacca, Poli, Test. Sicilian, vol. ii. pi. 30, f. 11. — Philippi, Moll. 

 Sicil. vol. ii. p. 65. 



„ cymbiformis, Maton and Rack. Trans. Linn. Soc. vol. viii. p. 104, pi. 3, 

 f. C— Mont. Test. Brit. Suppl. p. 64. 



„ patellaris, Lam. Anim. s. Vert. (ed. Desh.) vol. vii. p. 273 (fide Des- 

 hayes). 



„ piriformis, Lam. Anim. s. Vert. (ed. Desh.) vol. vii. p. 275. — Potiez, 

 Galerie Douai, vol. ii. p. 41, pi. 43, f. 10. 



„ fornicata, Lam. Anim. s. Vert. (ed. Desh.) vol. vii. p. 275 (probably). — 

 Turt. Dithyra Brit. p. 234, pi. 18, f. 12, 13. — Fleming, 

 Brit. Anim. p. 396. — Brit. Marine Conch, p. 123. — Brown, 

 Illust. Conch. G. B. p. 70, pi. 39, f. 14*, 15*. 



„ tuhularis, Turt. Dithyra Brit. p. 234. — Fleming, Brit. Anim. p. 396. 

 — Brit. Marine Conch, p. 124.— Brown, Illust. Conch. G. 

 B. p. 70. 



„ coronata, Bean, Mag. Nat. Hist. vol. viii. p. 564, f. 52. 



„ polymorphs,, Philippi, Moll. Sicil. vol. ii. p. 65. 



„ scabrclla, Philippi, Moll. Sicil. vol. ii. p. 65, pi. 18, f. 1. 



Professor Macgillivray has justly remarked, in his work 

 on the Molluscous Animals of Aberdeenshire, &c, that the 

 " property which the Anomia have of assuming and re- 

 taining the impression of the foreign bodies to which they 

 adhere, ought to render us very circumspect in defining 

 species." Acting under this impression, we have, in ac- 

 cordance with the opinion of the majority of those British 

 naturalists who enjoy the most ample opportunities for 

 examining and comparing the Anomiae in every stage of 

 growth, in every circumstance of habitat, and from the 

 most widely extended range of localities, united into one 

 species, after close personal study of the valves and careful 

 scrutiny of the synonymy, the various shells (both British 

 and foreign) above enumerated. Of the varieties, some few 

 are solely dependent upon colour for discrimination, others, 



