32 BULLETIN 90, UNITED STATES NATIONAL MUSEUM. 



somewhat subcylindrical or laterally flattened ; base rounded, slightly 

 imperfect in the specimen; aperture narrow, the body smooth, the 

 pillar twisted, with the edge perceptibly thickened. Height 11, 

 maximum diameter 2, length of last whorl 4 mm. 



Tampa silex beds. One specimen collected by E. J. Post and is 

 U. S. Nat. Mus. No. 214738. 



It resembles very much in form and size Spiraxis annae Pilsbry,^ 

 but I can find no traces of the sparse longitudinal grooves attributed 

 to the recent Jamaican species. 



Family ACTEONIDAE. 



Genus ACTEON Montfort. 



Acteon Montfokt, Conch. Syst., vol. 2, 1810, p. 314. Type, Voluta torna- 

 tilis Gmelin (not Actaeon Oken, 1815, or Acteon Fleming, 1828). — 

 Dall, Bull. Mus. Comp. Zool., vol. 43, No. 6, p. 235, 1908. 



ACTEON TAMPAE, new species. 

 Plate 4, fig. 10. 



Shell short, inflated, with a short, rather acute spire and about 

 five whorls; nucleus rounded, smooth; suture distinct; general sur- 

 face smooth except for the spiral sculpture, which consists of two 

 close-set equidistant deep grooves in front of the suture which make 

 the interspace and the sutural margin look like rounded threads; 

 near the periphery and in front of it are two or three distant shal- 

 lower striae ; on the base and extending to the anterior end are seven 

 or eight equidistant, moderately impressed striae; aperture mod- 

 erately wide the margins thick and solid, the pillar with one strong 

 plait; there is no umbilical perforation but a narrow depressed 

 smooth space behind the pillar. Height 7, diameter 4.5 mm. 



Tampa silex beds, at Ballast Point, Tampa Bay, Florida. One 

 specimen collected by E. J. Post, U. S. Nat. Mus. No. 166094. 



This species is perhaps nearest to A. shilohensis Whitfield, from 

 New Jersey, but differs in its sculpture and other minor details. 



Family TOENATINIDAE. 



Genus ACTEOCINA Gray. 



Acteocina Gray, Proc. Zool. Soc. London, for 1847, p. 160, No. 294. Type, 



Acteon toethcrilH Lea, Tertiary of Nevr Jersey. 

 Tornatina A. Adams, Thesaurus Conch., vol. 2, p. 554, 1850. — Fischer, Man. 



de Conchyl., p. 555. — Pilsbry, Man. C!onch., vol. 15, p. 181, 1893. Type, 



Bulla voluta Quoy and Gaimard. Guam. 



Gray's name preceds that of Adams by at least three years. 

 Its typical species appears to be a typical Tornatina, and it there- 

 fore will supersede the latter name. 



1 Man. Conch., vol. 19, pi. 3, fig. 32. 



