PANDORA.— Plate II. 



Species 13. (Mus. Brit.) 



Pandora punctata. Pan. testa expansd, lata, arcuaia ; 

 latere antico brevi, margine suprd medium sub- 

 cuneafo, intils impresso-punctatd dente unico, a mar- 

 gine distanti, radiato ; latere postico producto, ex- 

 panso suhrostrato, ad terminum elevato, acuminato ; 

 margiae dorsali arcuatim depresso ; valva sinistra 

 ad marginem ventralem expanse. 



The punctured Pandora. Shell expanded, broad, 

 arched; anterior side short, margin with a 

 slight corner above the middle, inside with im- 

 pressed-punctures rayed with a single tooth 

 distant from the margin ; posterior side produced, 

 expanded, slightly beaked, raised at the end, 

 acuminated ; dorsal margin depressed in a curve ; 

 left valve expanded at the ventral margin. 



C9NRAD. Proc. Zool. See, 1855. 



Hab. ? 



Species 14. (Fig. a, b, Mus. Brit.) 



Pandora glacialis. Pan. testd latA, brevitlsmld, 

 ventricosd, crassisiiculd, concentrice rugatd; latere 

 antico vix cuneato radiatim sulco inconspicuo 

 impresso, ad marginem sinuato ; latere postico 

 latiori, brevissimi rostrato, obtuso, prope marginem 

 costis duahus suhnoduliferis radiato, ad marginem 

 ventralem convexo ; valvd sinistrd profimdd, eden- 

 tuld ; valvd dextrd unidentatd ; cartilagine in foveam 



instnictd ; fovea ad laterd lamind calcarcd incras- 

 satd. 



The glacial Pandora. Shell broad, rather short, 

 ventricose, rather thick, ^VTinkled concentrically ; 

 anterior side with a very slight corner, impressed 

 with a slightly radiating groove, sinuated at the 

 margin ; posterior side broader, very shortly 

 beaked, obtuse, rayed near the margin with two 

 rather nodulous ribs, convex at the ventral 

 margin ; left valve deep, without teeth ; right 

 valve with one tooth ; cartilage inserted in a pit ; 

 thickened at the sides with a calcareous layer. 



Le.\ch. B. M. 



Hub. Spitzbergen. 



I can scarcely regard this slight thickening at the 



sides of the cartilage pit and cartilage as a separate 



ossicle. 



Species 15. (Mus. Brit.) 

 Pandora Braziliensis. Pan. testd brevi, lata, ohtnsd ; 



latere antico brevissimo ; latere postico late trttn- 



cato ; valvd sinistrd ventricosd. 

 The Brazilian Pandora. Shell short, broad, obtuse ; 



anterior side very short ; posterior side broadly 



truncated ; left valve ventricose. 



Gould ? MS. Brit. Mus. 



Hab. Brazil. 



I am unacquainted with the upper valve of this 

 shell, which may possibly prove to have been described 

 from a defective specimen. 



