30 PEOCEEDINGS OF THE NATIONAL, MUSEUM Vol.70 



Eight more specimens from the same station are in Doctor Eng- 

 berg's collection. Cat. No. 342330, U.S.N.M., contains 16 specimens 

 from Olga, Washington. Sixty more from the same station are in 

 Doctor Engberg's collection. Cat. No. 340865, U.S.N.M., contains 20 

 from Washington without specific locality. 



This species is nearest related to Alvania montereyensis Bartsch, 

 but can at once be distinguished from it by its much larger size, 

 as well as other detail characters. 



ALVANIA DALLI, new species 



Plate 3, fig. 6 



Shell small, thin, semitranslucent, bluish white. Nuclear whorls 

 one and one-half, strongly rounded, finely granular. Postnuclear 

 whorls rather inflated, strongly rounded, appressed at the summit, 

 marked by five low, rounded, not quite equal and equally spaced 

 spiral cords, which are about as wide as the spaces that separate them, 

 and numerous, fine lines of growth and microscopic, closely spaced, 

 spiral striations. The incremental lines and fine spiral sculpture give 

 to the surface of the shell a fine clothlike texture. Suture strongly 

 constricted. Periphery of the last whorl inflated, well rounded. 

 Base short, strongly rounded, narrowly umbilicated, marked by 14 

 spiral cords which become a little less strong and closer spaced an- 

 teriorly. In addition to this the base is marked by the fine sculpture 

 referred to on the spire. Aperture subcircular, posterior angle de- 

 cidedly obtuse ; outer lip thin, strongly curved, showing the external 

 sculpture within; columella slender and slightly reflected; parietal 

 wall covered by a thick callus which renders the peritreme complete. 



The type. Cat. No. 362154, U.S.N.M., comes from Shuyak Strait, 

 Afognak Island, Alaska. It has four and one-half postnuclear 

 whorls and the nuclear turns and measures, length 2.5 mm., diameter, 

 1.3 mm. 



Cat. No. 362155, U.S.N.M., contains four additional specimens 

 from the type locality, while Walter J. Eyerdam's collection contains 

 nine more. 



ALVANIA BURRADENSIS Bartsch 



Plate 3, fig. 5 



Alvania hurradensis Bartsch, Proc. Biol. Soc. Wash., vol. 34, 1921, p. 38. 



Shell very broadly ovate, pale yellow. Nuclear whorls decollated 

 in all our specimens. Postnuclear whorls strongly inflated, marked 

 by strong, rather distantly spaced, curved and slightly protractively 

 slanting axial ribs, of which 24 occur upon the next to the last and 22 

 upon the last turn. In addition to the axial ribs the whorls are 

 crossed by six equal and equally spaced, broad spiral cords, which 



