818 Zoological Society. 



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

 fulvo-rufescente, fasciis albis, angulatis, suhtus fusco-marginatis 

 variegate ; intus albo. Long. ri5 ; lat. 0*37 ; alt. 1*25 poll. 

 Hah. Macassar. Hinds legit. 



Nearly oval, rather fiat, 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. obliqul 

 ovaliy irregulari, postice suhproductd, subcompressd ; auriculis in- 

 cequalibus, posticis minoribus, costis numerosis, minutissime squa- 

 miferis ; colore sulphur eo, maculis magnis fuscis variegato, intus 

 ad marginem purpurea . Long. 1*20; lat. 0*50; alt. 1*40 poll. 

 Hah. ad Insulas Philippinas. H. Cuming legit. Found under 

 stones at low water on the island of Zebu. 



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

 with the scales more minute. 



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

 subtrigond, compressd, cequivalvi ; auriculis incequalibus, posticis 

 minimis, anticis magnis, acutis, sulcatis ; costis numerosis, cequa- 

 libus, subquadratis ; interstitiis griseo-maculatis, valvce sinistrce 

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

 0-93 ; lat. 0-25 ; alt. 1-19 poll. 

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

 water. 



Resembling P. ornatus, 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, tequivalvi, subcequi- 

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

 elevatis, subquadratis, Icevibus ; colore albo, pallide rosea tincta, 

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

 late. Long. 1-30; lat. 0*40; 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. 111. pi. 17. f. 152. 

 Pect. T. subtriangulari, crassd, subcequilaterali, sublcevi ; auriculis 

 incequalibus, castas squamiferas ferentibus ; costis 24, crassis, 

 elevatis, subquadratis, annulatis ; lateralibus squamiferis ; inter- 

 stitiis fere Icevibus, colore pallide purpurea, vel aurantiaca. Long. 

 4-50; lat. 1-50; alt. 4-30 poU. 



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 splendidulus, Thes. Conch, pi. 20. f. 246. Pect. T. ovali, 

 subtrigond, tenui, compressd, ad latera angulatd ; auriculis vald^ 

 incequalibus, squamoso-sulcatis, complanatis ; anticis latis, elonga-' 



