P E C T E N . 



Plate XXXIII. 



Species 149. (Mus. Cuming.) 



Pecten coeuscans. Pect. testa mihorbicnlmi, jjlaniuscidd, 

 tenui, inaquiauriculatd, pallide violascente, prope nm- 

 lones strigis panis lacfeis obliquis iiidutd; valvis con- 

 vexiusctdis, cousimililms, de.vtrd paUidiore, costis qua- 

 tuordecim, serratis, argute sulcatis, interstitm suleatis ; 

 auriculis UKequalibus, serrato-sulcatis, posticd miidmd, 

 obliqud ; intus pallescente. 



The glittering Pecten. Shell subovbicular, ratlier 

 flat, thin, unequal -eared, pale violet, covered near 

 the uuiboes with small oblique white streaks; valves 

 rather convex, very much alike, right valve paler, 

 ribs fourteen, serrated, smartly grooved, interstices 

 grooved ; ears unequal, serrately grooved, posterior 

 ear very small, oblique ; pale within. 



Hinds, Moll. Voy. Sulphur, p. 61. pi. 17. f. 3. 



Hab. Port Anna Maria, Nukuhiva, Marquesas Islands (in 

 .seven fathoms, on a sandy floor) ; Belcher. 



The specimens in Mr. Cuming's collection, with the 

 above name, being found to represent two distinct species, 

 I propose to substitute for the former, figured in the pre- 

 ceding plate, the name P. nux. The description above 

 printed is quoted word for word from Mr. Hinds, as being 

 the type. The description at Sp. 143 is from the shell 

 fiarured there. 



Species 1.50. (Mus. Cuming.) 



Pecten crotilus. Pect. tedd ovald, altiore quam longd, 

 aqidvalm, siibfcquilaterali, vahis leviier convexis, liris 

 irregularibus angustis dense minute squamaiis profuse 

 sculptis; intense purpurascente-ruhrd, sparsim nigro- 

 punctatd ; auriculis valde inaqualibns, anticis multo 

 majoribus. 



The slender Pecten. Shell ovate, higher than long, 

 equivalve, nearly equilateral, valves slightly convex, 

 profusely sculptured with densely minutely scaled 

 narrow irregular ridges ; deep purplish-red, sparingly 

 black-dotted ; ears very unequal, the anterior much 

 the larger. 



Hab. ? 



Of very thin substance, the purplish-red showing deeply 

 through in the interior. 



Species 151. (Mus. Cuming.) 



Pecten mundus. Pect. testa suborbiadari, tenui, com- 

 pressd, aquilaterali, cequivohi, valvis costis quatuor et 

 vigiuti temiibus leviter crei/afis radiutis, lira minutd 

 intercurrente ; aurantio-crocatd ; auriculis valde ina- 

 qualibus, anticis majoribus, subexpansis, per marginem 

 squamaiis. 

 The neat Pecten. SlieU suborbicular, thin, compressed, 

 equilateral, equivalve, valves rayed with twenty-four 

 thin, slightly crenated ribs, with a minute ridge run- 

 ning between them ; bright orange-yellow ; ears very 

 unequal, front ears larger, rather expanded, scaled 

 along the edge. 



Hab. ? 



A thin compressed shell, of very decided regular sculp- 

 ture. 



Species 152. (Fig. a, b, Mus. Cuming.) 



Pecten Deingi. Pect. testa trigono-ovatd, altiore quam 

 longd, subobliqud, conipressd, iruequilaterali, inrsqui- 

 valvi, valvis costis octo latiusculis, subdepressis, undique 

 serrato-liratis radiatis ; fulvescente, valvd shdstrd in- 

 terdum rufo-nigro punctata et variegatd, interdum in- 

 tense violaced, rufo umbones versus maculatd, valvd 

 dexlrd paUidiore ; auriculis valde intequalibus, anticis 

 late oblique expansis. 



Being's Pecten. Shell triangularly ovate, liigher than 

 long, rather oblique, compressed, inequilateral, in- 

 equivalve, valves rayed with eight rather broad, sub- 

 depressed ribs, which are everywhere serrately ridged : 

 light fulvous, left valve sometimes dotted and varie- 

 gated with red-black, sometimes deep violet, blotched 

 with red towards the umboes, right valve paler; ears 

 very unequal, the anterior broadly obliquely expanded. 



Hab. Bathurst Island, north-west coast of Australia : 

 Bring. 

 A light strongly striated species of rather tliin substance, 



somewhat obliquely expanded, with the front ear rather 



large and flexuous. Colouring extremely variable. 



Species 153. (Mus. Cuming.) 



Pecten Id^us. Pect. testa orbiculari, compresso-convexd, 

 aquilaterali, incequivalvi, valvis costis duodecim lirisque 

 numerosis, omidbus suhuodulosis et pulclierrime crenii- 



August, 1853. 



