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TERTIARY FAUNA OF FLORIDA 



Pinna carnea Gmclin. 



Pinna liaiiit iif/in/>i/is Chemn., Conch. Cab., viii., p. 212, pi. 87, fig. 769, 1785. 

 I'inna pfriiula Chcmn., <>/>. fit., viii., pp. 211, 242, pi. 92, fig. 785, 1785 ; Arango, Moll. 



Cuba, p. 264, 1878; Orbigny, Moll. Cuba, ii., p. 325, 1853; not of Reeve. 

 Pinna carnea (iniclin, Syst. Nat., p. 3365, 1792; Solander, Portland Cat., 1796; Des- 



haycs, in Lam. An. s. Vert., ed. ii., vol. vii., p. 61, 1836. 

 Pinna d,-i;cn,ra Link, Beschr. Rostock SainniL, p. 159, 1807. 

 Pinna Jhilh-llnin (Lam.), Kccve, Conch. Icon., Pinna., pi. x., fig. 18, 1858. 

 /'tuna 7'aricnsa Lamarck, An. s. Vert., vi., p. 133, 1819; Orbigny, Moll. Cuba, ii., p. 



325, i53- 

 / /'//i//ii Intllatii (Swains.) Reeve, Conch. Icon., Pinna, pi. ix., fig. 16, 1858. 



Post Pliocene of the Florida Keys; recent in the West Indies as far 

 south as Trinidad and north to Cape Hatteras, also in the Red Sea. 



As Chemnitz was not systematically binomial in nomenclature, his acci- 

 dentally binomial name cannot be accepted, though the earliest. This 

 species seems to be distinct from P. rudis, though it is often spinose or strongly 

 ribbed ; further study on this point is desirable. The typical P. nidis is not 

 known from Florida, though said to be abundant on the Bahamas. The 

 /-*. carnea varies from pale salmon color to a brownish white, and may be 

 smooth, or sparsely muricate; it is always thin, straight, and obliquely trun- 

 cate. /'. nidis is the only other true Pinna known from the east American 

 subtropical region ; the true P. ninricata (L.) Rve. is probably an Oriental 

 species, the ninricata of American authors belonging to the genus Atrina. 



Pinna rudis (I.innc) Dillwyn. 



Pinna nii/is L., Syst. Nat., ed. xii., No. 1159, 1766, ?x parts ; Chemn. Conch. Cab., viii., 

 p. 218, pi. 88, fig. 773, 1785 ; Dillwyn, Cat., p. 322, 1817; Hanley, Shells of Lin., 

 p. 148, 1855 ; Reeve, Conch. Icon., Pinna, pi. x., fig. 19, 1858 ; Gabb, Journ. Acad. 

 Nat. Sci. Phila., 2cl Scr., viii., p. 378, 1881. 



/'//!>/,! pi-rnu/a Reeve, Conch. Icon., Pinna, pi. 12, fig. 22, 1858 ; not of Chemnitz. 



Pliocene of Costa Rica, Gabb ; recent in the West Indies, Bahamas, 

 Bermuda, etc., Reeve, Jones, et al. 



This species is included on the authority of Gabb; I have seen no Florida 

 specimens unless P. carnea is a degenerate form of it. It is not the P. rudis of 

 authors from the Mediterranean and vicinity; the latter is a form of P. nobilis. 



Genus ATRINA Gray. 

 The condition of the material is such that only provisional descriptions 



