OSTREA. 253 



Inhabits 



This has much the appearance of an imperfect shell of O. pli- 

 ca, and differs principally in having only small auricles, and 

 one of them larger than the other ; Gmelin has quoted'three 

 of the above-mentioned figures for both species. 





Valves with the Auricles unequal. 



pallium. 14. Shell, with about thirteen convex 

 ribs longitudinally grooved, and armed with 

 transverse rows of small vaulted scales. 

 Ostrea pallium. Linnceus Syst. Nat. p. 1145. Born Mus. 

 p. 102. jSchroeter Einl. iii. p. 307. Grnelin, p. 3222.' 

 Barbut. Verm. p. 54. t. 8. f. 3. Shazv Nat. Misc. xii. 

 t. 4Q2. 

 Pallium Ducale. Chemnitz, vii. p. 302. t. 64. f. 607. 

 Lister Conch, t. 187. f.25. Rumphius, t. 44. f. B. ' Pe- 

 ttier Amb. t. 17. f. 2. Gualter, t. 74. f. F. Argenville, 

 t. 24. f. I. Seba, iii. t. 87. f. 8 to 12. Knorr, ii. t. 21. 

 f. 1 and 2, and v. t. 27. f. 2. Regenfuss, i. t. 6. f. 59, 

 and ii. t. 5. f. 41. Favanne, t. 54. f. O and K. Enc 

 Meth. t. 210. f. ]. 

 Inhabits the coasts of i\mboyna. Rumphius. Frederick's Is- 

 land. Regenfuss. Molucca Islands. Chemnitz. China. 

 Humphreys. 

 Shell about two inches or sometimes two inches and a half long, 

 and the length and breadth are equal ; the colour is generally 

 purplish red, elegantly mottled with brown and white, and 

 the inside is surrounded with a saffron border. Knorr, ii. t. 

 19- f. 4 and 5., from which O. subrotunda and O. maculo- 

 sa of Gmelin have been constituted, have no claim to be ar- 

 ranged separately, and Knorr calls both < Le Manteau bi- 

 garre;' the former is probably an imperfect, and the latter a 

 young shell of euher the present species or of O. sanguino- 

 lenta ; and Knorr, in describing the rounded ears 'of the 

 former^ says they appear * conirae si elles etoient usees.' 

 Gmelin's O. regia is also at all events too doubtful a species 

 to be retained. 



sanguinolenta. 15. Shell with about nine obtuse, 

 longitudinally grooved, and prickly ribs. 

 Ostrea sanguinolenta. Gmelin, p. 3322. 

 Ostrea picta. Solanders MSS.V 



