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TERTIARY FAUNA OF FLORIDA 



a manuscript name, are apparently not to be distinguished in form from the 

 deep-water variety named by me, in the Blake Report, sybariticuin, and per- 

 haps Ravenel's pictuin. 



Oardium (Laevicardium) sublineatum Conrad. 

 Cardiuin sublineatum Conrad, Trans. Am. Geol. and Nat., p. no, pi. v., fig. 13, 1842; Am. 



Journ. Sci., xli., p. 347, pi. ii., fig. 13, 1842; Medial Tert., p. 66, pi. 37. fig. 4, 1845; 



Tuomey and Holmes, Pleioc. Pes. S. Car., p. 64. pi. 19, fig. 3, 1856. 



Miocene of Wilmington, of the Natural Well and Magnolia, Duplin County, 

 North Carolina; Pliocene of the Waccamaw beds, Tilly's Lake, and' Dar- 

 lington, South Carolina ; Holmes and Burns. 



This species is easily recognized by its heavy shell, often with a marked 

 furrow, internally, from the centre of the umbonal cavity towards the base 

 midway between the adductor scars. It is also more compressed than any of 

 the other species. 



Cardiuin (Lsevicardium) Mortoni Conrad. 



Cardium Mortoni Conrad, Journ. Acad. Nat. Sci. Phila.. vL, p. 259, pi. 10, figs. 5, 6, 7, 



1830; Gould, Inv. Mass., p. gi, 1841. 

 Liocardium Mortoni Stimpson, Checkl. E. Coast Shells, p. 2, i860; Dall, Bull. 27, U. S. 



Nat. Mus., p. 54, pi. 58, fig. 8, 1889. 

 Ltrvicardium Mortoni Perkins, Proc. Bost. Soc. Nat. Hist., xiii., p. 150, 1869. 



Miocene of Jones Wharf, Maryland; Pliocene of the Caloosahatchie and 

 Shell Creek, Florida; Pleistocene of South -Carolina, and of Osprey, Florida, 

 at North Creek; recent from Nova Scotia south to Santa Marta, Brazil. 



The material in hand considerably extends the range, both in time and 

 space, of this well-known species. 



Other fossil American species are C. (L.) bulla Gabb (described as a Ser- 

 ripes), 1873, from the Tertiary of Santo Domingo; C. (L.) substriatiun 

 Conrad, 1838, from the Pleistocene of San Pedro, California; the great C. 

 (L.) elatuin Sowerby, 1833, from the Pleistocene of San Diego, California; 

 and C. (L.) Milleri Gabb, 1881, described from an internal cast of a Miocene 

 fossil from Costa Rica which may prove to belong to the genus Protocardia. 



Genus SEREIPES Beck. 

 Serripes gronlandious Beck. 

 Venus islandica O. Fabricius, Fauna Gronl.. p. 411, 1780; not of Linne. 

 Cardium grdnlandicum Chemnitz, Conch. Cab., vi., pp. 146, 202, pi. xix., fig. 198. 1782; 



