PECTEN. 



Plate XXXIV. 



Species 158. (Tig. 158 and 165, Mus. Cuming.) 



Pecten laevatus. Fed. testa snbtrigono-ovatd, tenui, 

 subplano-compressd, vix aquilaterali, mbaquivalvi, val- 

 vis liris mmierosis obtuse crenatis, Uneisque, dense ra- 

 diatis ; vivide aumntio-cmcind, vel nigra mineoque ra- 

 diatd, Uneis perpaucis albis notatd; awiculis valde 

 inaqualibus. 



The masked Pecten. Shell somewhat triangularly 

 ovate, thiu, rather flatly compressed, scarcely equi- 

 lateral, nearly equivalve, valves thickly rayed with 

 numerous obtusely crenated ridges and lines ; bright 

 orange-saffron, or rayed black and vermiHon, marked 

 with a few white lines ; ears very unequal. 



Hob. Philippine Islands. 



The ridges and lines are close-set, and very it-regular. 

 The colouring, as may be seen by the two speeimeus here 

 figured, is most variable, but the white zigzag lines are 

 constant. 



f^ 



Species 159. (Mus. Cuming.) 



Pecten sanguinolentus. Feet, testa ovatd, compressd, 



L couvexmscuM, aquilaterali, aquivalvi, valvis costis 



o'^-'' parvis octo et viginti profuse brevisquamatis confertim 



radiatis ; albidd, sanguineo-fusco plus minus tinctd et 



maculatd ; auricuUs inaqualibus. 



The blood-stained Pecten. Shell ovate, compressed, 

 rather convex, equilateral, equivalve, valves closely 

 rayed with twenty-eight small profusely short-scaled 

 ribs ; whitish, more or less stained and blotched with 

 blood -brown ; ears unequal. 



Hab. ? 



Peculiarly richly coloured and very profusely five-scaled. 



Species 160. (Mus. Cuming.) 



Pecten testudineus. Feet, testa ovatd, (equilaterali, 

 (sqicivalvi, valvis costis regularibus viginti radiatis, 

 costis confertis, versus marginem conspicue squamatis ; 

 luteo et fusco-nigro intense variegatd ; aurictilis valde 

 inaqualibus. 



The tortoise-shell Pecten. Shell ovate, equilateral, 

 equivalve, valves rayed with twenty regular ribs, ribs 

 close-set, conspicuously scaled towards the margin ; 

 deeply variegated with yellow brown-black ; ears very 

 unequal. 



August, 



Hab. Amboyna. 



A richly marked species, with very much the appearance 

 of tortoise-shell. 



Species 161. (Mus. Cuming.) 



Pecten feicatus. Fed. testa suborbiculari, compressd, 

 medio gibbosiusculd, aquivalvi, aquilaterali, valvis 

 costis qninque vel sex et viginti obtusis, ad latera sub- 

 acutangidis radiatis, costis tenuiserratis, lateralibus 

 minutii squamatis ; albidd, rnfescente prope marginem 

 sparsim maculatd; aurictilis inaqualibus. 



The eubbed Pecten. Shell nearly orbicular, compressed, 

 rather gibbous in the middle, equivalve, equilateral, 

 valves rayed with five- or six-and-twenty obtuse ribs 

 which are rather sharp-angled at the sides, ribs very 

 finely serrated, lateral ribs minutely scaled ; whitish, 

 sparingly blotched with red near the margin ; ears 

 unequal. 



Hab. ? 



The ribs are all more or less arched over with a fine 

 thread of red colour. 



Species 163. (Fig. a and b, Mus. Cuming.) 



Pecten blandus. Fed. testa suborbiculari, compresso- 

 convexd, aquivalvi, aquilaterali, valvis costis ad sex et 

 viginti tenue serrato-squamatis radiatis, interstitiis an- 

 gustis, costis lateralibus profuse minute squamatis ; cro- 

 cind vel miniaced, saturate aut pallide nebulatd ; auri- 

 cuUs valde inaqualibus. 



The allueing Pecten. Shell nearly orbicular, com- 

 pressly convex, equivalve, equilateral, valves rayed 

 with about six-and-twenty finely serrately squamate 

 ribs, interstices narrow, lateral ribs profusely mi- 

 nutely scaled; saffron or vermiUon, clouded darker 

 or lighter ; ears very unequal. 



Hab. Australia. 



The fine scales in this species are sometimes of a com- 

 pound character. 



Species 163. (Mus. Cuming.) 



Pecten daucus. Fed. testa suboblique orbiculari, sub- 

 ventricosd, aquivalvi, inaquilaterali, valvis costis qua- 



1853. 



