350 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 41. 



of the first basal cord. In addition to the axial ribs the whorls are 

 marked by low spiral cords, almost equaling the axial ribs in strength. 

 Of these cords there are 5 between the sutures on the first whorl and 

 6 on the last one. The spaces between these cords are about one- 

 fourth as wide as the cords. Suture poorly marked, scarcely at all 

 impressed. Periphery of the last whorl marked by a sulcus a little 

 wider than the spaces that separate the cords on the spire, crossed 

 by the continuations of the axial ribs. Base somewhat inflated, 

 well rounded, marked by eight ill-defined spiral cords, which are 

 separated by shallow impressed lines. Aperture oval; posterior 

 angle obtuse (outer lip fractured) ; inner lip strong, strongly curved, 

 and slightly reflected over and appressed to the base; parietal wall 

 covered with a strong callus. 



The type (Cat. No. 213691, U.S.N.M.) is a fossil and comes from 

 sand rock, San Pedro, California. It has 2^ post-nuclear whorls and 

 measures: Length 2 mm., diameter 1.2 mm. 



ALVANIA ILIULIUKENSIS, new species. 



Plate 31, fig. 2. 



Shell ovate, light purplish brown. Nuclear whorls two (surface 

 eroded). Post-nuclear whorls well rounded, appressed at the sum- 

 mit, marked by slender, protractively curved axial riblets, of which 

 24 occur upon the first, 36 upon the second, and about 45 upon the 

 last turn. These riblets are almost as wide as the spaces that sepa- 

 rate them. In addition to the axial ribs the whorls are marked by 

 low spiral cords which equal the axial ribs in strength. Of these 

 cords 6 occur upon the fu'st and 7 upon the second and the penulti- 

 mate turn, between the sutures. The spaces inclosed between the 

 axial ribs and spiral cords are small, squarish pits. Suture moder- 

 ately constricted. Periphery of the last whorl marked by a sulcus 

 equal to those occurring between the spiral cords on the spire. Base 

 strongly rounded, somewhat inflated, marked by 8 equal and equally 

 spaced, somewhat flattened, low spiral cords which equal the sulci 

 between them in width. In addition the base is marked by very 

 fine lines of growth which extend over the cords and interspaces. 

 Aperture broadly ovate; posterior angle obtuse; outer lip thin, with 

 a very faint varix immediately behind its edge; inner lip moder- 

 ately strong, strongly curved and reflected over and appressed to the 

 base; parietal wall covered with a thin caUus. 



The type and 7 other specimens (Cat. No. 213690, U.S.N.M.) were 

 dredged by the United States Bureau of Fisheries steamer Albatross 

 at station 3333 in 19 fathoms, off" Iliuliuk Harbor, Alaska, bottom 

 temperature 43.9°. The type has 3^ post-nuclear whorls and meas- 

 ures: Length 3 mm., diameter 1.7 mm. Cat. No. 208750, U.S.N.M., 

 contains a specimen dredged by Doctor Dall in 15-75 fathoms off 

 Belkoffski, Alaska. 



