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124.=; 



TERTIARY FAUNA OF FLORIDA 



cardinals and a rather long, slender anterior left lateral ; margins thin, smooth ; 

 pallial sinus small, rounded. Length 6.0, height 5.5, diameter 4.0 mm. 



This, the only fossil Tivela yet obtained in the Atlantic Tertiaries, is small 

 and delicate, .belonging to the group of T. trigonella Lamarck and T. abaconis 

 Dall, of the recent fauna. 



Tivela (Pachydesma) stultorum Mawe. 

 Donax stultorum Mawe, Syst. Conch., pi. ix., fig. 7, 1823 ; Wood, Ind. Tert. Suppl., pi. ii., 



fig. 2, 1825. 

 Trigona stultorum Gray, Analyst, viii., No. 24, p. 304, 1838; Deshayes, Cat. Conch. Brit. 



Mus., i., p. 46, 1853 ; Hanley, Rec. Sh., p. 106, 1843. 

 Cytherea (Trigonella) crassatelloides Conrad, Journ. Acad. Nat. Sci. Phila., vii., p. 253, 



pi. xix., fig. 17, 1837; Hanley, Rec. Sh., 1843, P- 106, pi. xv., fig. 17; Hinds, Zool. 



Sulph. Voy., p. 65, pi. xxi., fig. i, 1844. 

 Cytherea (Pachydesma) crassatelloides Conrad, Proc. Acad. Nat. Sci. Phila., vii., p. 31, 



1854; Carpenter, Suppl. Rep. Brit. Assoc., 1863, p. 640, 1864. 

 Trigona crassatelloides Deshayes, Cat. Conch. Brit. Mus., i., p. 46, 1853; Carpenter, 



Mazatlan Cat, p. 58, 1857. 

 Cytherea crassatelloides Sowerby, Thes. Conch., ii., pt. 12, p. 612, pi. cxxvii., figs. I, 2, 3, 



1851. 



Cytherea solidissima Philippi, Zeitschr. Mai., viii., p. 74, 1851. 

 Cytherea cequilatera Romer (not Deshayes), Krit. Unters., p. 60, 1857. 

 Cytherea Lamarckii Reeve, Conch. Icon., Cytherea, pi. iii., fig. 8, 1864 ; not of Gray, 1838, 



or Deshayes, 1853. 



Cytherea stultorum Reeve, Conch. Icon., Cytherea, pi. vi., fig. 22, 1864. 

 Cytherea crassatelloides Reeve, Conch. Icon., Cytherea, pi. i., fig. 3, 1864. 

 Pachydesma crassatelloides Gabb, Pal. Cal., ii., p. 96, 1868. 

 Tivela crassatelloides Romer, Mon. Venus, i., p. 2, pi. i., fig. I, pi. ii., fig. I, 1864; Stearns, 



Proc. U. S. Nat. Mus., xxi., p. 371, pis. xxiii., xxiv., and xxv., 1898. 

 Not Cytherea stultorum Philippi, Abbild. Beschr., ii., p. 180, pi. xv., fig. 3, 1847. 



Pleistocene of California from Santa Barbara to Todos Santos Bay ; living 

 from Santa Cruz, California, to Cape St. Lucas and perhaps to Mazatlan. 

 Mexico. 



This fine and well-known shell is one of the most characteristic Californian 

 species. T. (P.) inezana Conrad, 1857, from the Miocene of the Santa Ynez 

 Mountains, California, is the only other species known as fossil in the United 

 States. 



Genus STJNBTTA Link. 

 Sunetta Link, Beschr. Rostock Samml., p. 148, 1807; type Donax scripta L. ; Romer, 



Krit. Unters., p. 16, 1857; H. and A. Adams, Gen. Rec. Moll., ii., p. 427, 1857 (5". 



