21 



DIPSAS, Leach. 



470 Dipsas plicata. Leach j different sizes, and a 



pearl taken from one 



IRWIJVA. 



471 Iridina exotica, a pair^ both valves polished 



CHAM A. . 



472 Chama Lazarus, (a) a superb group, with an 



Area Noae 



473 damicornis 



474 gryphoides 



475 crenulata 



476 florida 



477 Limbulus 



478 ^-^ asperella 



479 '■ aeruginosa 



480a var. pallida, rugosa 



480Z>— the same variety, reverse 



481 Arcinella, several specimens, superb 



vai'ieties; (a) a specimen attached to a 

 Stromhus; (b) another adhering to a V^enus 

 482 Cristella? 



JETHERIA. 



483 iEtheria elliptica 



TRW AC JV A. 



484 Tridacna Gigas, several specimens 

 484a var. 



485 elongata, several specimens 



486 ■ squamosa, several specimens 



487 crocea, (a) a young one, of an orange 



colour 



