PECTEN.— Plate XXIX. 



The HAELEaoiN Pecten. Shell ovate, fau-shaped, equi- 

 lateral, inequivalve, left valve flat, right valve more 

 convex, both valves rayed with twelve smooth rather 

 obtuse ribs, lateral ribs serrated; white, left valve 

 irregularly tessellated with black and rose spots, and 

 rose -dotted, right valve faintly flesh -dotted; ears 

 equal. 



Gmelin, Syst. Nat. p. 3326. 



Hab. Eastern Seas. 



The tessellated painting varies considerably in this well- 

 known species, in being larger or smaller in pattern, but 

 it is always of the same colour. 



Species 131. (Mas. Cuming.) 



Pecten cdneolus. Fed. testa ohliqu£ fiabelUformi, com- 

 pressd, inaquilaterali, incequivalvi, valvis, sinistra pla- 

 niusculd, dextril coiwexiore, costis quatuordecim latis 

 liratis subnodosis radiatis ; fulvd, albo sparsim notatd 

 auriculis valde itiaqualibus, posticis vix nullis. 



The little wedge Pecten. Shell obliquely fan-shaped, 

 compressed, inequilateral, inequivalve, valves, the left 

 rather flattened, the right more convex, rayed with 

 fom'teen broad ridged subnodose ribs ; fulvous, 

 sparingly marked with white ; ears very unequal, the 

 posterior almost wanting. 



Hab. ? 



Characterized distinctly by its compressly oblique no- 

 dulous form. 



Species 132. (Mus. Cuming.) 

 Pecten alius. Pect. testa ovatd, ventricosd, altiore quam 



lonijd, aquilaterali, eequivalvi, valvis costis tenuiius 

 nmnerosis lavibus dense radiatis; violaced, fusco-nip-o 

 sparsim variegatd ; auriculis valde inaqualibiis, pos- 

 ticis perparvis. 



The high Pecten. Shell ovate, ventricose, higher than 

 long, equilateral, equivalve, valves densely rayed with 

 numberous smooth fine ribs ; violet, sparingly varie- 

 gated with brown-black ; ears very unequal, the pos- 

 terior very small. 



Hab. ? 



An unusually narrow ventricose species, closely finely 

 smooth-ribbed throughout. 



Species 133. (Mus. Cuming.) 



Pecten parvus. Pect. testa trigono-ovatdySubaquilaterali, 

 aquivalvi, valvis, sinistra plana, dextrd convexiore, 

 octocostatis, costis rotuudatis, tumidiusculk,Jimbriato- 

 scabrosis, alternatim majoribus, interstitiis liris farms 

 scabrosis duabus vet tribus ; alba, punctis perpaucis 

 roseis notatd, umbonibus roseis ; auriculis valde incB- 

 qualibus. 



The small Pecten. Shell triangularly ovate, nearly 

 equilateral, equivalve, valves, the left flat, the right 

 more convex, eight-ribbed ; ribs rounded, rather 

 swollen, fimbriately scabrous, alternately larger, in- 

 terstices with two to three small scabrous ridffes ; 

 white, marked with a very few rose dots, umboes 

 rose ; ears very unequal. 



SowERBY, Pro. Zool. Soc. 1835, p. 110. 



Eab. Lord Hood's Island, Pacific Ocean (in coral sand 

 on the reefs) ; Cuming. 



Most elaborately scabrous-sculptured throughout. 



/9f 



