304 Zoological Society. 



side is but slightly produced, the grooves are very deep, and they 

 run parallel with the lines of growth. 



5. Crassatella LAi'iDEA. Crciss. tesfd ovato-orbiculatd, epider- 

 mide fibrosd indtitd, lunhonibus parvis, striatis ; intus sub fused ; 

 latere anlico rotundato, abrupto, striis nonnullis brevibus ornnto ; 

 postico subangulato. Reeve, Conch. Icon. Crassatella, pi. 2. f. 7. 



Long. 1| ; alt. 1^ poll. Mus. Cuming. 



Hab. ad insulam Negros, Philippinarum. 



Mr. Cuming met with one true pair only and a few odd valves of 

 this species at the Island of Negros in coarse sand in seven fathoms 

 water. The shell somewhat resembles that of the Crassatella donucina, 

 but may however be readily distinguished. 



G. Ckassatella donacina. Lamarck, Anim. sans vert., vol. v. 

 p. 481. Reeve, Conch. Icon. Crassatella, pi. 3. f. 19. 



This shell, figured in Delessert's ' Recueil de Coquilles,' pi. 4. f. 1, 

 a, b, is extremely rare. The only specimens I have seen are in the 

 collections of Miss Saul and the Rev. Mr. Stainforth. 



7. Crassatella undulata. Sowerby, Proc. Zool. Soc, 1832, 

 p. 56 ; Reeve, Conch. Icon. Crassatella, pi. 1. f. 2. a. and b. 



8. Crassatella Antillarum. Crass, testa trigono-ovatd, vix 

 yibbosd, crassd, epidermide fibrosd indutd ; intus brunned, prope 

 ad murg'mem albicante ; umbonibus subdepressis, leviter undulatis ; 

 latere antico rotundato, postico subangulato. Reeve, Conch. Icon. 

 Crassatella, pi. 2. f. 8. 



Long. 3^ ; alt. 2^ poll. Mus. Cuming. 



Hab. ad insulam Margaritta, Antillarum. 



Mr. Cuming informs me that this beautiful species was dredged 

 up in the pearl-fisheries at the island of Margaritta in the West 

 Indies. It is erroneously figured in Delessert's ' Recueil de Co- 

 quilles' as the Crassatella rostrata of Lamarck. The rich chocolate 

 colour of the interior of this shell is very remarkable, approaching 

 somewhat in that respect to that of the preceding species. 



9. Crassatella jubar. Crass, testd subovatd, valde incequilaterali, 

 gibbosd, e^ctiis vivide radiatd, radiis ferruginosis, ab umbonibus, 

 juharum similitudine, divergentibus ; ad utrumque latus irregulari- 

 ter multistriatd ; epidermide fused, subquassd, sparsim indutd ; in- 

 tus alba, ad extremitatem posticam brunned ; umbonibus plicatis, 

 compressis ; latere antico inclinato, rotundato, postico arcuato, 

 elongato, acuminata. Reeve, Conch. Icon. Crassatella, pi. 2, f. 11, 



Long. 21 ; alt. 1| poll. Mus. Cuming. 



Hab. ad oras occidentales Novae HoUandiae. 



A single specimen of this fine shell was procured by Mr. Cuming 

 in Hamburgh ; it had been received from that prolific portion of the 

 globe above noted, and has made a valuable addition to the genus. 

 It has the general form of the C. gibbosa ; the sides are profusely 

 striated, and the entire surface is richly illumined with brownish rays, 

 diverging like solar beams from the umbones to the margin. 



