388 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiii 



This is a deep-water dwarf form of serration. It ma\^ include O/r- 

 dium jjiciicm Ravenel, but certainty can not be attained on account of 

 the loss of RaveneFs types. 



Cardium (Lsevicardium) mortoni Conrad, 1830. 



Range: Nova Scotia to Santa Marta, Brazil, in 1 to 5 fathoms. ]Mio- 

 cene to Recent. 



Serripes gronlandicus Gmelin. 1792. 



Range: Arctic and boreal seas, south to Cape Cod on the Atlantic 

 and Fuget Sound on the Pacific side, in 2 to 60 fathoms. Pleistocene. 



This is the Mactra radiata of Donovan, 1T99; the Cardium edentu- 

 lura of Montagu, 1808; Aphrodite columha Lea, 1834; Cardium lor eaJe 

 Reeve, ISltt, not of Broderip and Sower b}'. 1829; and Cardium fahricii 

 Deshayes, 185-4. 



Protocardia peramabilis Dall, 1886. 



Range: Rhode Island southward in deep water to Grenada, "West 



Indies. 18 to 104 fathoms. 



Protocardia tincta Dall, 1886. 



Range: Key West, Barbados, Santa Cruz, and Porto Rico, in 7 to 



100 fathoms. 



This was described as a variety of the preceding, which is a white or 

 yellowish shell, but the receipt of more specimens shows them to be 

 quite distinct. 



NOTES. 



Cardium. haitense Guppy, as of Sowerby, 1877, said to be dredged 

 alive in the Gulf of Paria, is probably Cardium antillarum Orbigny 

 or a related species. 



Cardiwn i^ictum Dunker, 1861 (April, not Cardium pictum Ravenel, 

 February', 1861), is probably a variety of Cardium papillosum Poll, 

 from south Europe, with a wrong locality label. It was a dealer's 

 shell. 



Cardium. pecii nut nm (Linnteus) Menke, cited from St. Vincent, is from 

 the island of that name in the Cape Verde group, not the Antillean 

 St. Vincent. 



Cardium cygnorum Deshayes, cited by J. Matthew Jones from Ber- 

 muda, is probabl}' a misidentification, as Deshaj'es's species came 

 from Swan River, Australia, and if found on Bernuida nuist have 

 been adventitious. 



Cardium eehinatum. O. Fabricius, 1780, from Greenland was doubt- 

 less derived from European 1)allast. 



Cardium fasciatum Montagu, of Wheatley, 1842, from South Caro- 

 lina, and De Kaj^, 1843, has not been authenticated as occurring on 

 the American coast, though it occurs in Iceland. 



