PECTEN.— Plate XXXIII. 



latis, radiatis, liris valva dextra lavioribus et plus re- 

 gularibns ; purpurascente-rufd, subiridescente. 



The uaspbekry Pecten. Shell orbicular, compressly 

 convex, equilateral, inequivalve, valves rayed with 

 twelve ribs and numerous ridges, all subnodose, and 

 very beautifully crenulated, ridges of the right valve 

 smoother and more regular; jourjalish-red, subiri- 

 descent. 



Hab. ? 



An extremely characteristic species, of a peculiar sub- 

 metallic raspberry colour. 



Species 154. (Mus. Cuming.) 



Pecten vestalis. Pect. tesia suhtrigono-ovatd, paululum 

 altiore quam longa, depresso-convexd, (pquilaterali, sui- 

 tsquivalvi, valvis, dextrd subconvexiore, costis octodecim 

 radiatis, costis triangularibus, confertis, lird serrato- 

 squamatd ad sum^nitatem et in sulco interstitiali ; ru- 

 hescente, punctis roseis aspersd, ad umbones lutescente ; 

 auriculis valde incequalibus. 



The vestal Pecten. Shell somewhat triangularly ovate, 

 a little higher than long, depressly convex, equilateral, 

 nearly equivalve, valves, the right rather the more 

 convex, rayed with eighteen ribs, ribs triangular, 

 close-set, with a serrately squamate ridge along the 

 summit and in the interstitial groove ; reddish, 

 sprinkled with rose dots, yellowish at the umboes ; 

 ears very unequal. 



Hab. West Indies. 



Of a delicate blush-red colour, peculiarly angle-ribbed 

 and serrated. 



Species 155. (Mus. Cuming.) 



Pecten solidulus. Feet, testa suborbiculari, soliduld, 

 suhplano-gibbosd, ad latera plano-compressd, ceqidlate- 

 rali, snbaquivalvi, valvis costis viginti subplanulatis 

 confertis radiatis, interstitiis leviter cremdatis ; albidd, 

 lateribus et valvd sinistra purpurascente maculatis ; 

 auriculis grandibus, subaqualibus. 



The rather solid Pecten. Shell nearly orbicular, 

 rather solid, rather flatly gibbous, flatly compressed 

 at the sides, equilateral, nearly equivalve, valves 

 rayed with twenty rather flattened close-set ribs, the 



interstices between which are slightly crenulated ; 

 whitish, sides and left valve spotted with light pur- 

 ple ; ears large, nearly equal. 

 Hab. ? 



This has somewhat the appearance of a young P. gibbo- 

 sus, but it is distinct. 



Species 156. (Mus. Cuming.) 



Pecten effulgens. Pect. testa ovatd, altiore quam 

 loiigd, temdculd, aquivalvi, siibiequilaterali, liris nu- 

 merosis tenuibus multisqtiamatis undique niiide radiatd; 

 aurantio-miniato, purpurascente albi-marginato arcua- 

 fim strigatd ; auriculis parviusculis, valde incequalibus. 



The bright Pecten. Shell ovate, higher than long, 

 rather thin, equivalve, nearly equilateral, neatly rayed 

 throughout with numerous thin many-scaled ridges ; 

 bright orange-vennilion, archedly streaked with light 

 white-edged purple ; ears rather small, very inequi- 

 valve. 



Hab. ? 



Of a bright subtransparent orange-vermilion, profusely 

 finely scaled. 



Species 157. (Mus. Cuming.) 



Pecten pusio. Pect. testa subtrigono-ovatd, compressim- 

 cnld, medio gibbosd, subaqidlaterali, aquivalvi, valvis 

 liris numerosis, acutis, irregularibus, subrude nodulosis 

 et hie illic squamafis, confertim radiatis ; albidd, pur- 

 purascente profuse punctata ; auriculis valde incequa- 

 libus. 



The child Pecten. Shell somewhat triangularly ovate, 

 rather compressed, gibbous in the middle, nearly 

 equilateral, equivalve, valves closely rayed with nu- 

 merous shai-p irregular ridges, somewhat rudely no- 

 didous, and here and there squamate ; whitish, pro- 

 fusely dotted with purple ; ears very unequal. 



Ostrea pusio, Linnaeus, Syst. Nat. p. 1146. 

 Pecten pusio, Lamarck. 



Hab. Mediten-anean. 



This shell, which we take to be the Linna3an 0. pusio, 

 is quite distinct from P. varius, as intimated by Lamarck 

 and Deshayes. 



