Art. 11 NEW AMERICAN MARINE MOKLUSKS — BARTSCH 19 



ODOSTOMIA (EVALEA) WHITEI, new species 



Plate 4, fig. 3 



Shell very small, elongate-ovate, bluish white. Nuclear whorls 

 smooth, deeply obliquely immersed in the first of the postnuclear 

 turns above which the tilted edge of the last volution only projects. 

 The nuclear spire is so obliquely placed that it gives the apex of the 

 shell a truncated appearance. Postnuclear whorls very slightly 

 rounded, not appressed at the summit, marked by rather strong, and 

 deeply incised spiral lines ; one a little heavier than the rest is situ- 

 ated a little below the summit and gives to this the appearance of 

 being slightly keeled. In addition to this sculpture the whorls are 

 marked by rather coarse lines of growth. Periphery of the last 

 whorl angulated. Base short, well rounded, not umbilicated, marked 

 by the continuation of the axial ribs and incised spiral lines which 

 equal those on the spire in strength. Aperture pear-shaped ; pos- 

 terior angle acute; outer lip thin; columella slightly curved, re- 

 flected over and appressed to the base for its posterior two-thirds, 

 and provided with a strong, oblique fold opposite the umbilical 

 chink; parietal wall covered with a heavy callus. 



The type, Cat. No. 362545, U.S.N.M., was collected by A. M. 

 Strong at Point Firmin, California. It has 4.8 whorls and 

 measures: Length, 2.2 mm.; diameter, 1.2 mm, 



A topotype is in Mr. Strong's collection. 



ODOSTOMIA (EVALEA) STRONGI. new species 



Plate 4, fig. 4 



Shell small, elongate-ovate, pale yellow, translucent. Nuclear 

 whorls deeply obliquely immersed in the first postnuclear whorl, 

 only half of the last turn showing, which is well rounded and smooth. 

 The early postnuclear whorls moderately rounded, marked by strong 

 spiral grooves which separate the whorl into equal cords, of which 

 10 occur on the second whorl in .the type. On the third whorl these 

 cords become very much enfeebled and on the last they are entirely 

 obsolete. On the last whorl the incremental lines are more con- 

 spicuous than on the preceding turns, probably largely due to the 

 absence of spiral sculpture. Suture well inpressed. The portion 

 at the summit of the shell' appressed to the preceding turn appears 

 as an opaque band. Periphery well rounded. Base rather long, 

 well rounded, not umbilicated. Aperture elongate oval ; outer lip 

 thin, rather sigmoid; inner lip thin, reflected over and appressed 

 to the base for three-fourths of its length, the anterior portion only 



