CYPRICARDIA.— Plate II. 



purpureo-fusco obsolete radiatd ; vmbonibus purpureo- 

 fuscis ; intus albd, ad extremitatem posticam purpureo- 

 violaceo tinctd. 



The Solen-like Cypricardia. Shell narrow, Solen- 

 shaped, posterior side flatly angulated ; white, pos- 

 teriorly obsoletely rayed with purplish brown ; urn- 

 bones purplish brown ; interior white, stained with 

 purple-violet at the posterior extremity. 



Reeve, Pro. Zool. Soc, 1843. 



Hab. Lord Hood's Island, Pacific Ocean (found at the 

 depth of five fathoms, piercing, and imbedded in, 

 the Avicula margaritifera) ; Cuming. 



The Cypricardia Solenoides, though approximating 

 greatly in form to the Cypricardia coralliophaga, differs 

 materially in structure and composition ; the two species 

 indeed exhibit all the differences upon which De Blain- 

 ville founded his genus Coralliophaga. Instead of pre- 

 senting that pellucid tenuity which seems peculiar to the 

 terebrating species, it is of the same solid opake structure 

 as the Cypricardia veUicata, the umbones have the same 

 purplish-brown patch upon them, and there is an evi- 

 dent indication of the same posterior streaks of that co- 

 lour. 



Species 12. (Mus. Cuming.) 

 Cypricardia coralliophaga. Cypr. testd angustatd, cy- 

 lindraced, Modiolteformi, tenui, semi-pellucidd, striis 

 numerosis, ab vmbonibus divergentibus, eximie notatd ; 

 latere postico laminis plurimis , elevatis, subdistantibus, 

 fimbriato ; intus albd, extremitate posticd ad margi- 

 nem roseo-tinctd. 

 The coral-eating Cypricardia. Shell narrow, cy- 

 lindrical, Modiola-shaped, thin, semitransparent, 

 delicately marked with numerous stria diverging 

 from the umbones ; posterior side frilled with several 

 rather distant raised lamina ; interior white, pos- 

 terior extremity stained with rose along the edge. 

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

 p. 439. 

 Chama coralliophaga, Gmelin, Chemnitz. 



Cardita dactylus, Bruguiere. 

 Coralliophaga Carditoides, De Blainville. 

 Hab. Lord Hood's Island, Pacific Ocean (found at tl 

 depth of five fathoms, piercing, and imbedded in, tl 

 Avicula margaritifera) ; Cuming. West Indies (foui 

 imbedded within masses of corals and madrepores 



The name attached to this species has the rare mei 

 of indicating in some measure the habits of the anima 

 For further notice of it, I must refer the reader to n 

 general remarks at the commencement of the genus. 



Species 13. (Mus. Cuming.) 



Cypricardia Guinaica. Cypr. testd subquadrato-ovati 



gibbosiusculd, oblique angulatd, angulo prope un 



bones prominente; latere postico ad extremitatem con, 



presso, ad apicem rotundato ; lutescente-albd, umbont 



versus pallide purpured, striis nodulosis divergentibm 



lirisque undulatis transversis eximie decussatd ; intit 



albd, in medio roseo-tinctd. 



The Guinea Cypricardia. Shell somewhat square! 



oval, rather gibbous, obliquely angulated, angl 



rather prominent near the umbones ; posterior sidi 



compressed at the extremity, rounded at the top 



yellowish white, tinged with pale purple toward 



the umbones, delicately crossed over the entire sur 



face, but more strongly towards the ventral mar. 



gin, with nodulous divergent stria; and wave( 



transverse ridges; interior white, stained in th< 



middle with rose -pink. 



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



p. 438. 



Chama Guinaica, Chemnitz. 

 Cardita carinata, Bruguiere. 

 Hab. Lord Hood's Island, Pacific Ocean (found on the 

 reefs at half-tide in coarse coral sand) ; Cuming. 

 This is not the Chama oblonga of Linnseus (for which 

 vide Plate I. Fig. 4 a and b), as supposed by Lamarck 

 and Deshayes ; it is a shorter, stouter shell, and inva- 

 riably smaller. 



