FREE INSTITUTE OF SCIENCE 



TERTIARY FAUNA OF FLORIDA 



1507 



Neccra costata Bush, Trans. Conn. Acad., vi., p. 472, pi. xlv., fig. 21, 1885 ; Rep. U. S. 



Com. Fisheries for 1883, p. 85, 1885 ; not of Sowerby, 1834. 

 Cuspidaria (Cardiomya) ornatissima Dall, Blake Report, part i., p. 296, 1886; Bull. U. S. 



Nat. Mus., No. 27, p. 66, No. 420, pi. xli., fig. 21, 1889. 

 Cardiomya glypta Bush, Proc. U. S. Nat. Mus., xx., p. 810, pi. Ixxi., fig. i, Ixxvi., figs. 



3, 7, 1898. 



Pliocene marls of the Caloosahatchie and Shell Creek, Florida, Dall and 

 Burns ; living from Cape Hatteras, North Carolina, southward to Cuba and 

 Guadeloupe in two to one hundred and twenty-four fathoms. 



This is the most abundant species of our recent fauna and very variable as 

 regards the radial sculpture and to some extent also varying in convexity and 

 form. The major radials are crenulate and slightly flattened above ; finer 

 radial threads may appear in the interspaces and sometimes nearly reach the 

 strength of the others ; there are usually five to eight major radials, the minor 

 ones may be few or reach ten or twelve in number ; the rostrum may have 

 two or three faint threads or be almost smooth. Orbigny's figures are taken 

 from half-grown specimens, yet one is figured as having eight ribs on 'one 

 valve and thirteen on the other in the same individual. No characters having 

 been indicated by which they can be constantly differentiated, I have no hesi- 

 tation in uniting Miss Bush's species with that of Orbigny. 



Cuspidaria (Plectodon) granulata Dall. 

 Ncara granulata Dall, Bull. Mus. Conip. Zool., ix., p. iii, 1881. 

 Leiomya {Plectodon) granulata Dall, Bull. Mus. Comp. Zool., xviii., p. 300, pi. iii., fig. 8, 



1886; Dall, Bull. U. S. N. Mus. No. 37, P- 66, pi. iii.,. fig. 8, 1889. 



Pliocene marls of the Caloosahatchie River, Florida, Dall, a single valve. 

 Living from Cape Florida to Barbados in fifty-four to one hundred and 

 eighteen fathoms. 



Family . 



Genus SPHBNIOPSIS Sandberger. 

 Spheniopsis Sandberger, Conch. Mainz. Tert. beck., p. 289, 1863 ; Stoliczka, Cret. Pelyc. 



India, p. 37, 1871 ; Tryon, Struct, and Syst. Conch., iii., p. 141, pi. cv., figs. 1-3 



{S. scalaris Braun), 1884. 



This peculiar little shell was described from the Oligocene of Germany 

 and so far is known only from that epoch, the Pliocene Necera, which Stoliczka 

 compared with it, belonging to a different group. Heretofore this genus has 

 not been known from America, and the specimens about to be described from 



