PECTEN. 



Plate XVI. 



Species 56. (Mus. Cuming.) 



Pecten PSEUDAMtsiUM. Fed. testa rotundatd, tenui, 

 compressd, subaqu'daterali, cequivahi, valvd sinistrd 

 radiatim striata, livido-cinered, rufo-fmco etfulvo ma- 

 cidatd, valvd dextrd concentrice driatd palVuliore. 



The false-compass Pecten. Shell rounded, thin, 

 compressed, nearly equilateral, equivalve, left valve 

 radiately striated, livid -ash colour, blotched with 

 fulvous and red- brown, right valve concentrically 

 striated, paler. 



Klein, Meth. Ost. p. 134. pi. 9. f. 31. 

 Pecten exoticus, Chemnitz. 

 Ostrea Jiybrida, Gmelin. 



Hab. West Africa. 



The left valve of this species is striated radiately, and 



the right valve concentrically. 



Species 57. (Pig. a, b, Mus. Cuming.) 



Pecten pseudo-luia. Feet, testa suborhiculari, incequi- 

 laterali, auricuUs valde inaqualibus, (equivalvi, subven- 

 tricosd, radiatim crebricostatd, costis septeiii et vic/inti, 

 hie illic subliratis, ubique acute squamatis ; aurantid, 

 albo nmbones versus maculatd, interdum luted. 



The false-file Pecten. Shell nearly orbicular, inequi- 

 lateral, ears very unequal, equivalve, a little veutri- 

 cose, radiately closely ribbed, ribs seven-and-twenty 

 in number, here and there slightly ridged, everywhere 

 sharply sealed ; orange, spotted towards the umboes 

 with white, sometimes yellow. 



SowERBY, Thesaurus Conch, vol. i. p. 78. pi. 20. f. 335. 



Hab. Jacna, Island of Bohol, Philippines ; Cuming. 

 A deKcately-coloured species, rayed with numerous 



close-set, sharply-scaled ribs. 



Species 58. (Mus. Cuming.) 



Pecten L.\ueentii. Feet, testa suborbieulari, eequilate- 

 rali, tenuiculd, valde incequivalvi, valvd sinistrd pla- 

 nulatd, subflexuosd, radiatim striata, purpurea -riifd, 

 dextrd convexd, albidd, purpurascente pallide radiatd, 

 intus temiicostatd, costis ad quadratjinti, biiiis. 

 Laurence's Pecten. Shell nearly orbicular, equilateral, 

 rather thin, very inequivalve, left valve flattened, 

 rather flexuous, radiately striated, pm'ple-red, right 

 valve convex, whitish, faintly rayed with light purple, 

 finely ribbed within, ribs about forty, disposed in 

 pairs. 

 Gmelin, Syst. Nat. p. 3317. 

 Hab. China. 



Allied to P. ziczac, but well distinguished by its thin- 

 ner and subflexuous structure, as well as in colouring. 



Species 59. (Mus. Cuming.) 



Pecten luculenta. Feet, testd subtrigond, altiore quam 

 lomjd, suhcompressd, inaquilaterali, auriculis valde in- 

 aqualibiis, aquivalvi, radiatim liratd, et deeemcostatd, 

 costis siibacutis, irregidaribus, aureo-lutescente, nigri- 

 catite-fusco in sulcis profuse punctata. 



The bright Pecten. Shell somewhat triangular, higher 

 than long, rather compressed, inequilateral, ears very 

 unequal, equivalve, radiately ridged and ten-ribbed, 

 ribs rather sharp, irregular, golden-yellow, profusely 

 dotted within the grooves with blackish-brown. 



Hab. Bathurst Island, North Australia. 



This pretty species from Australia is nearest allied to 

 F. jies-felis and tigris. 



Species 60. (Mus. Cuming.) 



Pecten mdscosijs. Feet, testd subglobosd, aqidlaterali, 

 auricidis sxdjelongato-productis, (equivalvi, valvis ven- 

 tricosis, octodecimcostatis, costis sidcisque dense mimde 

 scabrosis, costis squamis erectis medio subirregidariter 

 armaiis ; fulvo-rufd. 



The mossy Pecten. Shell somewhat globose, equi- 

 lateral, auricles rather elongatcly produced, equi- 

 valve, valves ventricose, eighteen -ribbed, ribs and 

 grooves thickly minutely scabrous, somewhat irre- 

 gularly armed down the middle with erect scales ; 

 fulvous-red. 



Wood, Index Testaceologicus, Supp. pi. 2. f. 2. 



Hab. ■? 



This appears to be a very good species. Both valves 

 are alike, globosely ventricose, and prominently scaled. 



Species 61. (Mus. Cuming.) 



Pecten flextiosus. Feet, testd fiabellatim rotundatd, 

 plus minus ventricosd, (gquilaterali, subesquivalvi, valvis 

 radiatim siriatis, sinistrd deeemcostatd, costis alterna- 

 tim major ibus, fumeo- albidd, nigro-fusco promiscui 

 maculatd, dextrd deeemcostatd, costis binis, cEqualibus, 

 albd, sparsim punctata. 



The flexuous Pecten. Shell fan-like rounded, more 

 or less ventricose, equilateral, nearly equivalve, valves 

 radiately striated, left valve ten-ribbed, ribs alter- 

 nately larger, smoky-white, promiscuously blotched 

 with black-brown, right valve ten-ribbed, ribs equal, 

 disposed in pairs. . 

 Ostrea Jlexuosa, PoK. 

 Pecten Isabella, Lamarck. 



Hab. Mediterranean. 



Allied to P. glaber, of the same locality. 



February, 1853. 



