NO. 2193. WEST AMERICAN MARINE M0LLU8E8—BART8CH. 665 



numerous slender axial riblets. Aperture oval, decidedly effuse an- 

 teriorly; posterior angle acute; outer lip thin, rendered wavy at the 

 edge by the external sculpture; inner lip long, oblique, curved, some- 

 what revolute, provided with a strong oblique fold at its insertion; 

 parietal wall covered by a moderately thick callus. 



The type. Cat. No. 266180, U.S.N.M., was dredged in shallow 

 water in Santa Maria Ba}^ lower California. It has 4^ postnuclear 

 whorls and measures, length, 3.5 mm. ; diameter, 1.9 mm. 



ODOSTOMIA (EVALEA) VALEROI, new species. 



Plate 4G, fig. 7. 



Shell ovate, narrowly umbilicated, thin, bluish white. Nuclear 

 whorls small, completel}^, deeply, obliquely immersed in the first of 

 the succeeding turns. Postnuclear whorls inflated, strongly rounded, 

 appressed at the summit, crossed by numerous very fine, closely 

 spaced spiral striations. Suture moderately constricted. Periphery 

 of the last whorl inflated, well rounded. Base short, inflated, 

 strongly rounded, narrowly umbilicated. Aperture broadly oval; 

 posterior angle obtuse ; outer lip thin, protracted between the summit 

 and periphery to form a claw-like element; inner lip decidedly 

 curved, slender, and somewhat revolute, provided with a strong 

 oblique fold at its insertion; parietal wall glazed with a thin callus. 



The type and another specimen. Cat. No. 266545, U.S.N.M., were 

 dredged in shallow w^ater in Magdalena Bay, lower California. The 

 type has five postnuclear whorls and measures, length, 3 mm; diame- 

 ter, 1.7 mm. Six additional specimens. Cat. No. 267754, U.S.N.M., 

 were dredged in shallow water in Santa Maria Bay, lower California. 



ODOSTOMIA (EVAL'EA) FRANCISCANA, new species. 

 Plate 45. fig. 7. 



Shell thin, broadly elongate conic, yellowish white. Nuclear whorls 

 small, deeply embedded in the first of the succeeding turns, above 

 which the tilted edge of the last volution only projects. Postnuclear 

 whorls inflated, well rounded, feebly shouldered at the summit, 

 marked by almost vertical, very feeble, incremental lines and ex- 

 ceedingly fine, closely spaced, spiral striations. Suture moderately 

 constricted. Periphery of the last whorl very feebly angulated. 

 Base short, inflated, well rounded, wath a very narrow umbilical 

 chink. Aperture large; posterior angle acute; outer lip thin; inner 

 lip strongly curved, somewhat reflected and provided with a strong, 

 oblique fold at its insertion ; parietal wall glazed with a thin callus. 



The type and three specimens. Cat. No. 214431, U.S.N.M., were 

 collected at United States Bureau of Fisheries Station 5729, in San 



