217 



bus, ehyanter crenatis, ornata ; lunula tumente, radiatim coa- 

 tata ; area magna, planata, excavata ; carinis acufis definita ; 

 intus alba, postice fusco-purpurea ; dent. card. ii. -iii. validis ; 

 sinu pallii minimo ; epidermide tenui, sericea. 

 Long. 1-34, lat. 1-5, alt. -9. 



Hab. San Diego; legit T. Nuttall; sp. unic. in Mus. suo. 

 This exquisitely beautitul species belongs to the group of V. ama- 

 thusia, &c. Although only one specimen is known, its characters 

 are not such as to accord with the uumerous similar species already 

 described. 



40. Cypricardia Californica, Conr. Journ. p. 236. pi. 18. f. 4. 

 Hab. Sta. Barbara et San Diego ; rupibus argillaceis, inter flux- 



um maris; una cum Pholadibus. Mus. Nuttall. 



= Cypricardia Duperryi, Desh. in Guer. Mag. 1841, teste Gould. 



41. Chamą exogyra, Conr. Journ. p. 256 ; Reeve, Conch. Ic. 

 sp. 38. pi. 7. 



Hab. Sta. Barbara, San Diego, &c. in rupibus, glomerantes. 

 Mus. Nuttall, Gould, Cuming, Brit. 



One of Dr. Gould' s specimens, probably belonging to this species, 

 is dextral. 



— 42. Chamą ? frondosa, var. ?Mexicana, jun., B. M. Maz. Cat. 

 p. 87. no. 121. 



Hab. Sta. Barbara. Mus. Nuttall. 



One fine young specimen appears to belong to this species. 



43. Chamą pellucida. 



Hab. Sta. Barbara. Mus. Nuttall. 



One very fine specimen in company with the other species. 



44 a. Cardium Nuttallii, Conr. Journ. p. 229. pi. 17. f. 3. 



Hab. "Straits of San Juan da Fuco," paludibus luteosis. Mus, 

 Nutt., Brit. 



The natives cross a little peniu sula to get to the place where this 

 fine species lives, which they use as food, being of flavour superior 

 to the English kinds. It grows so large that Mr. Nuttall found a 

 squaw baling out a canoe with one of the valves. 



44 b. Cardium Californianum, Conr. Journ. p. 229. pi. 17. 

 f. 4. 



Hab. Sta. Barbara ; valvae solitariae, rare. Mus. 1 



= C. Nuttallii, var. teste Mid. ; non C. Califomiense, Desh. ^ 



4.5. Cardium auADRAGENARiUM, Conr. Journ. p. 230. pi. 17. 

 f. 5. 



Hab. Sta. Barbara, rare. Mus. Jay. • 



1=. C. luteolabrum sive xanthocheilum, Gould. 



