PECTEN. 



Plate XX. 



Species 72. (Mus. Cuming.) 



Pecten Bruei. Fed. testa suhtrigono-orbiculari, sub- 

 cotttortd, (eqiiilaterali, eeqidvalm, profuse irregnlariter 

 squamato-costatd et Virata ; ftisco-pnrpicred, albo versus 

 umbonem sparsim tinctd, valod dextrd paUidiore, costis 

 Urisque parviusculis ; auriculis valde ineequalibus. 



Brue's Pecten. Shell somewhat triangularly orbicular, 

 a little twisted, equilateral, equivalve, profusely irre- 

 gularly squamately ribbed and ridged ; brown-purple, 

 sparingly blotched with white towards the umboes, 

 right valve paler, with the ribs and ridges rather 

 smaller ; ears very unequal. 



Payk.\udeau, Cat. Moll, de Corse, p. 78. 



Ilab. Mediterranean. 



Of somewhat contorted growth, very closely irregularly 

 rayed with scaly ribs and ridges. 



Species 73. (Mus. Cuming.) 



Pecten undclatus. Fed. testa triffono-ovatd, cequila- 

 terali, subaquivalvi, subtilissime granulosd, costis quin- 

 qne ad sex subdistantibus radiatd, costis valvts sinistra 

 subnodosis, interstitiis latis, tenuiliratis, costis valvce 

 dextree latis et tenuiliratis, interstitiis Icevioribiis ; 

 valvd sinistra coccineo-rufd, albo sparsim maculatd, in- 

 tus purpureo-rosed, dextrd alba, versus umbotiem pur- 

 pureo-rosed ; auriculis valde ineequalibus. 



The waved Pecten. Shell triangularly ovate, equila- 

 teral, nearly equivalve, very finely granuled, rayed 

 with five to six rather distant ribs, ribs of the left 

 valve subnodose, the interstices being broad and 

 finely ridged, ribs of the right valve broad and finely 

 ridged, the interstices being smoother; left valve 

 scarlet-red, sparingly spotted with white, purple-rose 

 within, right valve white, purple-rose towards the 

 umbo ; ears very unequal. 



SowERBY, Thesaurus Conch, vol. i. p. 60. pi. 19. f. 206 

 and 207. 



Hab. Mediterranean. 



It is doubtful whether this is anything more than a va- 

 riety of that extremely variable and widely distributed 

 European species, F. Danicus. 



Species 74. (Mus. Cuming.) 



Pecten Singaporinus. Fed. testd orbiculari, valde com- 

 pressd, aquilaterali, aquivalvi, costis ad duabus et vi- 

 ginti subangustis rotundatis elevatis radiatd, intersti- 

 tiis excavatis, pttlcJierrime concentrice striatis ; albidd 

 vet rufescente-aurantid, cinereo-nigricanie plus minus 

 nebulatd, costarmn interstitiis excavatis phmmum albis; 

 auriculis subgrandibus, tenuibus, inmqiialibus. 



The Singapore Pecten. Shell orbicular, very com- 

 pressed, equUateral, equivalve, rayed by about twenty- 

 two rather narrow rounded raised ribs, interstices 

 excavated, very beautifully concentrically striated ; 

 whitish or reddish-orange, more or less clouded with 

 ash-black, interstices between the ribs excavated, 

 mostly white ; ears rather large, thin, unequal. 



Sowerby, Thesaurus Conch, vol. i. p. 74. pi. 13. f. 55, 

 and pi. 14. f. 71. 



Hab. Singapore. 



Remarkable for its compressed and very regular growth, 

 strongly and numerously ribbed, with the interstices neatly 

 closely striated across. 



Species 75. (Mus. Cuming.) 



Pecten aspekrimus. Fed. testd tenuiculd, suborbiculari, 

 subaquilaterali, aquivalvi, costis quiuque et viginti 

 angulatis, conjertis, undique subtiUter scabroso-liratis 

 radiatd, fusco-rufescenie, immacidatd ; auriculis in- 

 (Bqualibus, obliquis. 



The very rough Pecten. Shell rather tliin, suborbi- 

 cular, nearly equilateral, equivalve, rayed with twenty- 

 five close-set angled ribs, finely scale-ridged through- 

 out, brown-red, unspotted ; ears unequal, oblique. 



Lamarck, Anim. sans vert (Deshayes' edit.) vol. vii. p. 145. 



Hab. Van Diemen's Land. 



The ribs are broad at the base, and adjoin without any 

 intermediate groove. They are then angled to a keel at 

 the summit, and are finely scale-ridged all over. 



Species 76. (Mus. Cuming.) 



Pecten lentiginosus. Fed. testd subtrigono-oblongd, 

 altiore quam longd, compressiusculd, subifquilaterali, 

 aquivalvi, costis angulatis foliaceo-squamatis ad duabus 



April, 1853. 



