304 Zoological Society, 



pallide spadiced, umbones versus albd, strigis latis, nndatis, ornatd; 

 epidermide holosericd ; intus albd, margine exiliter crenulato. 

 Conch. Icon., Pectunculus, pi. 8. f. 47. 



There is no very striking peculiarity in this species, although it is 

 too distinct from any other to require comparison. I have seen se- 

 veral specimens of it, both in London and Paris, but have not suc- 

 ceeded in obtaining its true locality. 



Pectunculus formosus. Pect. testd lenticulari, subdepressd, vel 

 Icevi vel subobscure radiatd, subtilissime concentrice striatd ; luteo- 

 lacted, maculis spar sis violaceo-purpureis, longitudinaliter inqui- 

 natis, formose pictd. 

 Conch. Icon., Pectunculus, pi. 8. f. 48. 



There are two or three specimens of this handsome shell at Paris, 

 both in the collection at the Jardin des Plantes and in that of 

 M. Delessert. 



Pectunculus sericatus. Pect. testd orbicular!, Pectiniformi, de- 

 pressiusculd, albidd, rosaceo-fusco sparsim tinctd et maculatd, 

 epidermide sericd crassd indutd ; radiatim sulcatd, sulcis subdi- 

 stantibus ; intus albd. 



Conch. Icon., Pectunculus, pi. 9. f. 49. 



Hab. Island of Tortola, West Indies. 



This exceedingly delicate shell is remarkable for its glossy silken 

 epidermis ; the hinge-shelf in the interior of each valve is nearly as 

 broad and solid as that of the Pectunculus strigilatus, and the teeth 

 are as closely set ; the shell altogether exhibits many characters in 

 common with that species, but no indication of the peculiar manner 

 in which it is attenuated towards the umbones. 



This is the only specimen I have seen at present. 



Pectunculus lividus. Pect. testd orbiculari, tumidd, inaquilate- 

 rali, antice angulatd ; longitudinaliter radiatd, radiis latis, eleva- 

 tiusculis, subtilissime striatis,rubido-fuscis,marginem versus Hvido- 

 ccesiis, epidermide pilosd plus minusve indutis ; radiis anticis 

 creberrimis ; umbonibus recte incurvis, maculis albidis perpaucis 

 circumsparsis ; intus albd, medio purpureo-nigricante tinctd et 

 maculatd. 



Conch. Icon., Pectunculus, pi. 9. f. 51. 



Hab. Red Sea. 



Pectunculus Delessertii. Pect. testd orbiculari, tumidiusculd, 

 subsolidd, incequilaterali, altitudine longitudinem cequante ; radiatim 

 sulcatd, sulcis numerosis, profundis, subtilissime striatis, liris in- 

 termediis subtilissime granuloso-corrugatis, longitudinaliter in- 

 cisis; albd, fasciis pluribus aurantio-brunneis transversim undatd, 

 intervallis fusco lineato-punctatis ; intus albd, antice rubido-purpu- 

 reo tinctd. 



Conch. Icon., Pectunculus, pi. 9. f. 52. 



Cardita radula. Card, testd subquadralo-oblongd, albidd, de- 

 pressd, costis tribus et viginti, rubido-fuscis, imbricato-squamosis, 

 squamis fornicatis, semi-erectis, subacutis ; costarum inter stitiis 

 crenulatis ; margine crenato. 



Conch. Icon., Cardita, pi. 1. f. 2. 



