CRASSATELLA.— Plate I. 



Species 3. (Mus. Stainforth.) 



Crassatella castanea. Crass, testd ovato-trigond, gib- 

 bosd, umbonibus plane erosis, epidermi.de castaned, 

 quasi politd, nitente, indutd; intiis subfuscd ; latere 

 antico rotundato ; postico angulifero, abrupto. 



The chestnut Crassatella. Shell ovately triangular, 

 smoothly eroded at the umhones, and covered else- 

 where with a bright chestnut-coloured epidermis, 

 as smooth and shining as if it were polished ; inte- 

 rior rather tinged with a dark fleshy brown ; the 

 anterior side rounded; the posterior somewhat an- 

 gular and abrupt. 



Reeve, Proceedings Zool. Soc, 1842, p. 42. 



Hab. Coast of New Holland. 



The Crassatella castanea, the largest of the genus, is 

 singularly distinguished by a smooth erosion of the urn- 

 bones ; the bright horny nature of the epidermis is also 

 a characteristic feature. I only know of three speci- 

 mens of this fine shell, which, like most of the produc- 

 tions of New Holland, exhibit a very marked peculiarity 

 of character. 



Species 4. (Mus. Stainforth.) 



Crassatella decipiens. Crass, testd ovatd, subgibbd, 

 epidermide fused partim indutd, vivide radiatd, radiis 

 ab umbonibus ad margines scepe extensis ; latere an- 

 tico subangulato, striis brevibus ornato ; postico sub- 

 quadrato, parian productiore. 



The deceptive Crassatella. Shell ovate, slightly gib- 

 bous, partially covered with a brown epidermis, and 

 vividly rayed, the rays, in most instances, extending 

 from the umbones to the outer margins ; anterior side 

 rather angular, and ornamented with short stria? ; 

 posterior side somewhat square, and but slightly 

 produced. 



Reeve, Proceedings Zool. Soc, 1S42, p. 42. 



Hab. Coast of New Holland. 



This species, which has arrived in great abundance 

 from New Holland, has been received by most collectors 

 as the Crassatella Kingicola ; I moreover regret that it 

 has been figured under that title in my ' Conch. Syst.' 

 This error was kindly pointed out to me by Mr. Sowerby. 

 The Crassatella Kingicola, which I had not previously 

 seen, is a very distinct species, and one of extreme rarity; 

 indeed, the specimen which has furnished me with the 

 following description is the only one I have seen. 



Species 5. (Mus. Stainforth.) 



Crassatella Kingicola. Crass, testd solidd, ovalo- 

 orbiculatd, vise gibbd, subdepressd, albido -flavescente , 

 epidermide flavido -fused indutd ; umbonibus valdius- 

 culi' plicatis, pallide roseis ; latere antico rotundato ; 

 postico leviter angulato. 



The King Island Crassatella. Shell solid, ovately 

 orbicular, very little gibbous, rather depressed, of a 

 pale yellow colour, covered with a yellowish brown 

 epidermis ; umbones rather strongly plaited, and 

 palely tinged with rose-colour; anterior side round- 

 ed ; posterior slightly angulated. 



Lamarck, Anim. sans vert. (Deshayes' edit.), vol. vi. 

 p. 109. 



Deshayes, Enc. Meth., vers, vol. ii. p. 20. 



Sowerby, Genera of Shells, No. 3. pi. 2. 



Hab. King Island, New Holland. 



This interesting shell may be easily recognized by its 

 rosy-tinted umbones, which are, moreover, rather strong- 

 ly plaited. The specimen before me, belonging to the 

 Rev. Mr. Stainforth, is, I believe, the only one in this 

 country. M. Deshayes, however, says, in the 'Encyclo- 

 pddie Mdthodique,' that he has a large specimen in his 

 possession ; and Mr. Cuming informs me that he has 

 lately seen one at Hamburgh. 



