278 OSTREADiE. 



P. pusio, Pennant. 



Affixed when adult ; more or less distinctly marbled ; with 

 crowded and prickly costellar stria?, which are usually arranged 

 so as to alternate in size ; interstices extremely narrow, not 

 squarely defined. 



Plate L. fig. 4, 5, and LI. fig. 7. 



Lister, An. Angl. pi. 4, f. 31 ; Hist. Conch, pi. 172, f. 9. 

 Ostrea pusio, Linn. Syst. Nat. ed. 12, p. 1146 (probably). — Donov. Brit. Shells, 



vol. i. pi. 34. 

 Pecten pusio, Penn. Brit. Zool. ed. 4, vol. iv. p. 101, pi. 61, f. 65. — Turt. 

 Dithyra Brit. p. 215, pi. 17, f. 2. — Flem. Brit. Animals, p. 

 385. — Macgilliv. Moll. Aberd. p. 226. — Brit. Marine Conch, 

 p. 119. — Sowerby, Genera Shells, Pecten, f. 6. — Philippi, 

 Moll. Sicil. vol. i. p. 84, and vol. ii. p. 58. — Reeve, Conch. 

 Systemat. pi. 114, f. 6. — Sowerby, Thesaur. Conch, vol. i. p. 

 72, pi. 14, f. 62,63. 

 „ distortus, Da Costa, Brit. Conch, p. 148, pi. 10, f. 3, 6. — Mont. Test. 

 Brit. p. 148, and Suppl. p. 61. — Alder, Cat. Northumb. and 

 Durh. Moll. p. 77. — Loven, Index Moll. Skandin. p. 30. 

 Ostrea distorta, Pulteney, Hutchins, Hist. Dorset, p. 36. 



„ sinuosa, Maton and Rack. Trans. Linn. Soc. vol. viii. p. 99. — Rack. 

 Dorset Catalog, p. 38, pi. 10, f. 3, 6. — Turt. Conch. Diction, 

 p. 130. — Dillw. Recent Shells, vol. i. p. 262. — Index Testa- 

 ceolog. pi. 10, Ostrea, f. 34. 

 Pecten sinuosus, Turt. Dithyra Brit. p. 210, pi. 9, f. 5. — Fleming, Brit. Ani- 

 mals, p. 384. — Forbes, Malac. Monens. p. 40. — Macgilliv. 

 Moll. Aberd. p. 225. — Brit. Marine Conch, p. 116. — Brown, 

 Illust. Conch. G. B. p. 73, pi. 25, f. 2. — Lam. Anim. s. Vert, 

 (ed. Desh.) vol. vii. p. 148. 

 Hinnites sinuosus, Desh. Anim. s. Vert. vol. vii. p. 149, note. — Sowerby, 



Thesaurus Conch, vol. i. p. 79, pi. 20, f. 1, 2, 3 Cuvier, 



Regne Anim. (ed. Croch.) pi. 77, f. 1. — Brod. Penny 

 Cyclop, vol. xvii. p. 359. 

 „ pusio, Sowerby, Conch. Manual, f. 173. 

 Pecten Isabella, (fry.) Macgilliv. (not Lam.) Moll. Aberd. p. 225 (fide Jef- 

 freys from type). — Brit. Marine Conch, p. 250 (copied). — 

 Brown, Illust. Conch. G. B. p. 132 (do). 

 „ spinosus, Brown, Illust. Conch. G. B. p. 73, pi. 24, f. 8. 

 „ striatus (fossil) Sow. Min. Conch, pi. 394. f. 2, 4. 



The habits and appearance of this Pecten, which we 

 have not ventured to call the pusio of Linna;us, although we 



