34 BULLETIN 90, UNITED STATES NATIONAL MUSEUM. 



RETUSA VAGINATA Ball. 



Utriculus vaginatus Dall, Trans. Wagner Inst., vol. 3, pt. 1, p. 16, Aug., 

 1890; pt. 2, p. 219, pi. 20, fig. 2, 1892. 



Tampa silex beds at Ballast Point, Tampa Bay, Florida; Dall. 

 U. S. Nat. Mus. No. 97473. 



This species recalls B. mayoi Dall, of the recent fauna, in minia- 

 ture, but has a deeper suture with the margin in front of the suture 

 sharp edged as in OUvella. 



Family SCAPHANDEIDAE. 



Genus SCAPHANDER Montfort. 



Scaphander Montfort, Conch. Syst., vol. 2, p. 334, 1810. Type, Bulla 



lignaria Linnaeus. 

 Assula Schumacher, Essai, pp. 78, 258, 1817. 



The gizzard plates of the animal were found separated from the 

 rest of its anatomy and described under the names of Gioenia and 

 Tricla in the eighteenth century. 



SCAPHANDER PRIMUS Aldrich. 



Scaphander primus Aldrich, Journ. Cin. Soc. Nat. Hist., 1885, p. 148, pi. 

 2, figs. 7a, 7&. — Dall, Trans. Wagner Inst., vol. 3, p. 17, 1890. 



Shell ovate, with crowded, inequidistant transverse striae; spire 

 concealed; aperture large, expanding below, contracted above by the 

 intrusion of the body whorl; outer lip sharp, arcuate, rising above 

 the apex of the shell, pillar arcuate with a narrow callous margin 

 and a thin layer of callus on the body. Length 15, diameter 10 mm. 



Tertiary of Red Bluffs, Mississippi; Aldrich, Oligocene of the 

 Tampa silex beds at Ballast Point, Tampa Bay, Florida. U. S. Nat. 

 Mus. No. 97476. 



Though the specimens from the silex beds are smaller, they appear 

 to be merely immature specimens of Aldrich's species. 



Family BULLARIIDAE. 

 Genus BULLARIA Rafinesque. 



Bulla Linnaeus, Syst. Nat., ed. 10, p. 725, 1758 ; not Bulla Linnaeus, same 

 reference, p. 427 (Orthoptera)'. 



Bullaria Rafinesque, Anal. Nat., 1815, p. 142 (new name for Bulla Lin- 

 naeus).— Dall, Bull. Mus. Comp. Zool., vol. 43, No. 6, p. 243, Oct., 1908. 

 Type, B. ampulla Linnaeus. 



Bullea Blainville, Malac, 1825, pp. 477, 626 ; not of Rafinesque, 1815. 



Vesica Swainson, Malac, p. 360, 1840. 



Since Linnaeus used his generic name on two occasions and for two 

 entirely different animals, we are obliged to substitute for the later 

 one the first valid name applied to the group, which is that of Rafi- 

 nesque, as I pointed out in 1908. 



