ABT. 22 SAN PEDRO FAUNA OLDEOYD. 35 



umbilical chink, but not openly umbilicated, marked like the spire. 

 Aperture short, broadly oval; posterior angle acute; outer lip thin at 

 the edge ; inner lip strongly curved, slightly sinuous, provided with 

 a very strong oblique fold a little anterior to the insertion of the 

 columella ; parietal wall covered by a thin callus. 



Type.— C&t. No. 352531, U.S.N.M., has 6.3 postnuclear whorls and 

 measures : Length, 8.7 mm. ; diameter, 4 mm. 



An additional specimen is in the Oldroyd collection. 



The present form is related to Odostomm (Amaura) sanjuanemis 

 Dall and Bartsch, but differs from it by its larger size and a little 

 less sloping shoulder, as well as minor sculptural characters. The 

 fine spiral striations have been omitted in the figure. 



ODOSTOMIA (AMAURA) TIMESSA, new species. 



Plate 2, fig. 4. 



Shell large, elongate conic, broadly umbilicated, yellowish white. 

 Nuclear whorls deeply, very obliquely immersed in the first post- 

 nuclear turn, above which only the tilted edge of the last volution 

 projects. Postnuclear whorls well rounded, narrowly shouldered at 

 the summit, marked by numerous lines of growth and very fine 

 spiral striations. Suture somewhat constricted. Periphery of the 

 last whorl inflated, well rounded. Base strongly inflated, well 

 rounded, marked like the spire. Aperture large; posterior angle 

 acute ; outer lip thick within ; inner lip curved and provided with a 

 strong oblique fold a little anterior to its insertion; parietal wall 

 covered by a thin callus. 



Type. — Cat. No. 352532*, U.S.N.M.. has almost 7 postnuclear whorls 

 and measures : Length, 7.4 mm. ; diameter, 3.2 mm. 



Two additional specimens are in the Oldroyd collection. 



This species is related to Odostomia {Amaura) washingtona 

 Bartsch, but is in every way smaller than that species. The fine 

 spiral striations have been omitted in the figure. 



EPITONIUM CONTINUATUM, new species. 



Plate 2, fig. 10. 



Shell small, acute, with a smooth nucleus of two, and six and a 

 half subsequent well rounded whorls; suture deep but not solute; 

 with twelve vertical sharp varices continuous over the suture and 

 making nearly a complete circuit around the spire ; there is no angle 

 on the varices at the shoulder and no spiral sculpture or basal disk; 

 the aperture is subovate and the base imperforate; length of shell, 

 8: of last whorl, 3.6; maximum diameter, 3.5 mm. 



Type.— C2it. No. 352383, U.S.N.M. 



One specimen was obtained. 



45554— 25— Proc.N.M.vol.65 43 



