218 Zoological Society. 



cato ; costis 5, crassis, rotundatis, gradatim declinantibus ; colore 

 fulvo-rnfescente, fasciis cilbis, angulatis, subtus fusco-marginatis 

 variegate ; intiis albo. Long. Tlo ; lat. 0'37 ; alt. r25 poll. 

 Hab. Macassar. Hinds legit. 



Nearly oval, rather flat, equilateral, with fine radiating striae ; auri- 

 cles nearly equal, striated ; hinge obliquely plicated ; ribs five, 

 rounded, not very deep ; colour dull fawn, variegated with angular 

 bands of white edged with brown lines. The whole surface of the 

 shell has a somewhat velvety appearance. 



Pecten serratus, Thes. Conch, pi. 13. f. 56. Pect. T. obliqui 

 ovali, irregulari, postice subproductd, subcompressd ; auriculis in- 

 cequalibus, posticis minoribus, costis numerosis, minutissime squa- 

 miferis ; colore sulphureo, maculis magnis ftiscis variegato, intus 

 ad marginem purpureo. Long. 1-20; lat. O'oO ; alt. 1"40 poll. 



Hab. ad Insulas PhiHppinas. H. Cuming legit. Found under 

 stones at low water on the island of Zebu. 



ResembUng P. squamosus, but more oblique and more ventricose, 

 with the scales more minute. 



Pecten albolineatus, ITies. Conch, pi. 14. f. 69. Pect. T. ovali 

 subtrigond, compressd, cequivalvi ; auriculis inccqualibus, posticis 

 minimis, anticis magnis, acutis, sulcatis ; costis numei-osis, cequa- 

 libiis, subquadratis ; interstitiis griseo-maculatis, valvce sinistra 

 costis griseis, lineis albis interruptis, costarum tribus albis. Long. 

 0-93; lat. 0-25; alt. M9 poll. 



Hab. Ins. Guimaras, Philippinarum. Found under stones at low 

 water. 



Resembling P. ornatiis, Lam., but with the ribs more numerous, 

 equal and regular. 



Pecten singaporinus, Thes. Conch, pi. 13. f. 151, et pi. 18. f. 71. 

 Pect. T. rotundatd, subtrigond, subcompressd, cequivalvi, siibcequi- 

 laterali, subtenui ; auriculis inccqualibus ; anticis magnis ; costis 24 

 elevatis, subquadratis, Icevibus ; colore albo, pallide roseo tincto, 

 radiis quatuor latis,fusco-maculatis;prope umbones griseo macu- 

 lato. Long. 1-30 ; lat. 040 ; alt. 1-30 poll. 



Hab. Singapore. Found in coarse sand at the depth of six fathoms. 



More depressed spreading and circular than P. Tranquebaricus. 



Pecten crassicostatus, Thes. Conch, pi. 15. f. lll.pl. 17. f. 152. 

 Pect. T. subtriangulari, crassd, subazquilaterali, sublcBvi ; auriculis 

 incequalibus, costas squamiferas ferentibus ; costis 24, crassis, 

 elevatis, subquadratis, annulatis ; lateralibus squami/eris ; inter- 

 stitiis fere IcEvibus, colore pallide jmrpureo, vel aurantiaco. Long. 

 4-50; lat. l-oO; alt. 4-30 poll. 



Hab. Japan. Mus. H. Cuming. 



A much larger and more solid shell than P. senatorius, -with the 

 ribs much more elevated and more square. 



Pecten splendidtjlus, Thes. Conch, pi. 20. f. 246. Pect. T. ovali, 

 subtrigond, tenui, compressd, ad latera angulatd ; auriculis valde 

 inaqualibus, squamoso-sulcatis, complanatis; anticis latis, elonga- 



