PECTEN. 



Plate XXVI. 



Species 104. (Mus. Cuming.) 



Pecten mieificus. Pect. testa, trigono-orbkulari, flabel- 

 liformi, tenuicula, aquilateraU, inaquivalvi, valvd si- 

 nistra concavo-pland, costis qninque distantibus grandi- 

 squamatis radiatis, costd esquamatd prope marginem 

 intercurrente, valvd dextrd convexd, decemcostatd, cos- 

 tis ad summitatem angustis et obtuse muricatis ; vivide 

 carmined, aureo-luteo lentiginosd, adumbonespallidiore; 

 aiiriculis suhaqualibus. 



The strange Pecten. Shell triangularly orbicular, fan- 

 shaped, rather thin, equilateral, inasquivalve, left 

 valve concavely flattened, rayed with five distant 

 large-scaled ribs, with a scaleless rib between them 

 near the margin, right valve convex, ten-ribbed, ribs 

 nan'ow and obtusely prickly along the summit ; 

 bright carmine, freckled with golden-yellow, paler at 

 the umboes ; ears nearly equal. 



Hah. Amboyna. 



A very singular species, remarkably distinct from any 

 hitherto described. 



Species 10.5. (Mus. Cuming.) 



Pecten aurantiacus. Pect. testd siMrigono-orbiculari, 

 paululum altiore quam longd, valde compressd, esqui- 

 lalerali, subaqidvalvi, valvd sinistra plauald, dextrd 

 leviter convexd, amhabus undique tenuiliratis et dense 

 minutissime squamatis, costis qimiuordecim rotundatis, 

 interstitiis angustis, profundis, radiatis ; pallide rosea, 

 luteo, et vivide aurantio pulclierrime marmoratd ; au- 

 ricidis snbirqttalibus. 



The orange-colodbed Pecten. Shell somewhat tri- 

 angularly orbicular, a little higher than long, very 

 compressed, equilateral, nearly equivalve, left valve 

 flat, right valve slightly convex, both everywhere 

 finely ridged and densely very minutely scaled, and 

 rayed with foui-teen rounded ribs, the interstices be- 

 tween which are narrow and deep ; very beautifully 

 marbled with pale rose, yellow, and bright orange ; 

 ears nearly equal. 



Adams and Keeve, Zool. Voy. Samarang, MoUusca, p. 74. 

 pi. 21. f. 12. 



Hab. China Sea. 



Richly coloured and very beautifully minutely sculp- 

 tured. . 



Species 106. (Mus. Cuming.) 



Pecten tinctus. Pect. testd trigono-ovatd, altiore quam 

 longd, vix cequilaterali, csqnivalvi, valvis undique ra- 

 diatim dense fortiter liratis, liris subirregularibus, ut 

 plurinmm binis, serratis ; albidd, aurantio-minio tinctd 

 et variegatd ; auricutis valde incequalibics. 



The tinged Pecten. Shell triangularly ovate, higher 

 than long, hardly equilateral, equivalve, valves every- 

 where radiately densely strongly ridged, ridges rather 

 irregular, for the most part in pau's, serrated ; whitish, 

 stained and variegated with orange-vermilion ; ears 

 very unequal. 



Hab. ? 



In sculpture this species approaches P. asperulatus, but 



it differs in form, and the ears are different. 



Species 107. (Mus. Cuming.) 



Pecten superbus. Pect. testd oblique fiabelliformi, ovatd, 

 crassiuscnld, peculiariter concavo-compressd, ineequi- 

 laterali, ceqidvalvi, valvis costis rotundatis angustis 

 dmbus et viginti radiatis, costis lavibus, vel sub lente 

 minutissime concentrice striatis, interstitiis profunde 

 excavatis, marginibus lateralibus creberrime tenuilira- 

 tis ; albidd aut lutescente, sanguineo-rufo promiscue 

 conspurcatd ; auriculis parvis, laviuscuUs, subaqua- 

 libus. 



The superb Pecten. Shell obliquely fan-shaped, ovate, 

 rather thick, peculiarly concavely compressed, inequi- 

 lateral, equivalve, valves rayed with two-and-twenty 

 narrow rounded ribs, ribs smooth, or, beneath the 

 lens, very minutely concentrically striated, interstices 

 deeply excavated, lateral margins very closely finely 

 ridged ; whitish or yellowish, promiscuously smeared 

 with blood-red; ears small, rather smooth, nearly 

 equal. 



Sowerby, Thesaurus Conch, vol. i. p. 63. pi. 12. f. 11. 



Hab. ? 



Of a singularly distinct typical form, and characteristic 



also in respect of colour. 



Fig. 108. (Mus. Cuming.) 



The shell here figured, from the West Indies, proves on 

 examination to be a variety of P. exasqieratus from the 

 same locality. 



May, 1853. 



