NO. 1903. WEST AMERICAN PYRAMIDELLW MOLLUSKS—BARTSCH. 285 



Seven specimens of this species were dredged at Skidegate; three at 

 station 5, which raay be considered cotypes; two at station 4, and two 

 at station 2. Of these, two of the cotypes are in the collection of 

 the Geological Survey of Canada, and one m the United States 

 National Museum, Cat. No. 220116; of the other two lots one from 

 each station is in the collection of the Geological Survey of Canada 

 and the United States National Museum. The cotype figured has 5 

 post-nuclear whorls and measures: Length, 3.4 mm.; diameter, 1.6 mm, 



This species foUows Odostomia (Evalea) hagemeisieri in the key. 



ODOSTOMIA (EVALEA) PALMERI. new species. 

 Plate 38, figs. 4, 4a. 



Shell very small, elongate-ovate, semitranslucent, bluish-white. 

 Nuclear whorls deeply, obhquely immersed in the first of the succeed- 

 ing turns, above which only the tilted edge of the last volution 

 projects. Post-nuclear whorls well rounded, feebly shouldered at 

 the summit, marked by exceedmgly fine, almost vertical lines of 

 growth and microscopic spiral striations. Sutures strongly impressed. 

 Periphery and the rather long base of the last whorl weU rounded, 

 marked like the spire. Aperture very large, regidarly ovate ; posterior 

 angle obtuse; outer lip thm; inner Up very oblique, almost straight, 

 voiy slender and very slightly revolute; parietal wall glazed ^vith a 

 thm callus. 



Two specimens of this species (Cat. No. 198903, U.S.N. M.) were 

 collected b}' Dr. Edward Palmer at the head of the Gulf of California. 

 The type has 4 post-nuclear whorls and measures: Length, 1.4 mm.; 

 diameter, 0.8 mm. 



This species is nearest to Odostomia (Evalea) tenuis Carpenter from 

 Mazatlan, but difTers from it in not being umbilicated mid ui having 

 the whorls more rounded and not overhangmg. 



This species foUows Odostomia (Evalea) granadensh in the key. 



ODOSTOMIA (EVALEA) CASSANDRA, new species. 

 Plate 38, fig. 5. 



Shell small, ovate, very tliui, semitransparent, light yellow. Nuclear 

 whorls deeply immersed in the first of the succeeding turns. Post- 

 Jiuclear whorls very strongly, tabulatedly shouldered at the summit, 

 moderately rounded, marketl by line incremental Imes, imd numerous 

 exceedmgly closely spaced, very fine, spiral striations. Sutures 

 strongly constricted. Periphery of the last whorl well-roundeil. 

 Base rather long, well-rounded. Aperture very large, broadly oval; 

 posterior angle decidedly obtuse; outer lip very thm; inner lip very 

 slender, veiy oblique, somewhat smuous, strongly curved, and 

 slightly reflecteil over the base, but not appressed to it, provided 

 %vit]i a weak fold some little distance anterior to its insertion. 



