HYPERAULAX. 1 0,, 



oligocene H. floridanus (Conr.), of which Bnlimuhis longcevus 

 Ancey (Le Naturalists, May, 1881, p. 414) is a synonym; H. 

 heilprinianus (Dall); H. stearnsii (Ball), and H. antericanus (Dall), 

 Trans. Wagner Free Inst. Science, iii, pp. 5-7 (1890); all from the 

 Silex Beds at Tampa, Florida. 



H. RIDLEYI (Smith). Vol. XI, p. 82. 



Some specimens are smaller than those described, one before me 

 measuring, length 8.2, diam. 5, aperture 4.5 mill., with 4^ whorls. 

 There is no pale band at the periphery, the whole shell being dull 

 brown, with angular buff lines and dots. It is densely but super- 

 ficially striate spirally. The nepionic shell consists of nearly 2 

 whorls, which are densely, minutely sculptured with waved wrinkles. 



Section Bonnanius Jousseaume, 1900. 



Bull, de la Societe Philomatique de Paris, n. ser., ii, p. 39. 



In this section the aperture is contracted by blunt teeth : two on 

 the parietal wall, the upper (angular lamella) tubercular, the lower 

 (infraparietal lamella) compressed and entering; one on the colu- 

 mella, and one (the upper palatal) within the outer lip. In view 

 of the great variability of teeth in all the groups of Odontostominse, 

 the group does not seem of more than subgeneric or sectional rank. 



H. RAMAGEI (E. A. Smith). PI. 11, figs. 60, 61, 62. 



Shell subperforate and shortly rimate, obesely-ovate, solid, sculp- 

 tured with fine wrinkles of growth and faint spiral lines ; reddish- 

 brown, encircled by whitish bands, four on the last whorl. Spire 

 shortly conic, the apex obtuse, sculptured with close, vertical, waved 

 wrinkles ; last whorl very obese, rounded below, having a pit behind 

 the outer lip, another behind the columellar lip. Aperture slightly 

 oblique, irregularly ovate, brownish within, obstructed by four teeth: 

 a small, tubercular angular, well separated from a thick, entering 

 infraparietal lamella ; a large squarish tooth on the columella, and 

 a large vertical fold with irregular or crenate edge within the middle 

 of the outer lip. Peristome thick, reflexed, and with the teeth, ivory 

 white ; parietal callus rather heavy, thickened into a low nodule at 

 the posterior angle of the aperture. 



Length 18^, diam. 13, longest axis of aperture 11 mill. 



Length 23^, diam. 16 mill. (Smith, types of ramrtgei'}. 



Length 17^, diam. 12^ mill. (Smith, types of ramagei). 



