call] new species of shells 155 



aperture is 59, its breadth 28 mm. The same dimensions of 

 Schrenck's form are given by him as, respectively, 104, 47, 46, and 

 28 mm. with 8 to 9 whorls. Type, U. S. Nat. Mus., 170,798, from 

 the east coast of Nippon. 



CHRYSODOMUS ADELPHICUS Dall, n. sp. 



Shell small, compact, with about eight whorls, with a deep channel 

 1.5 mm. in width in front of the suture, bordered anteriorly by a 

 rounded ridge ; first three or four whorls subequal, the remainder 

 rapidly increasing in width ; sculpture of fine spiral striae, the inter- 

 spaces hardly raised, the striae segregated into fasciculi by recurring 

 slightly wider sulci ; base with the striae obsolete and the fasciculi rep- 

 resented by slightly more prominent but feeble spiral ridges ; pillar 

 callous, arcuate, twisted, almost pervious ; canal elongate, narrow, 

 recurved ; outer lip thin, gently concave in the middle ; shell brownish 

 cream-color, the aperture white. Lon. of shell, 58; max. lat., 24; 

 Ion. of last whorl, 38; of aperture, 30 mm. 



U. S. Nat. Mus., 109,247. Yokohama. W. J. Fisher. 



This shell was kept for many years in the supposition that it was 

 C. pericochlion, but on comparison is easily separable. 



CHRYSODOMUS ONCODES Dall, n. sp. 



Shell solid, compact, turgid, pale brown, of about six whorls ; apex 

 defective ; whorls rounded, with suture inconspicuous, in front of it 

 sloping gently, with two or three prominent spiral cords separated 

 by wider spirally threaded interspaces ; the middle of the whorls 

 with three prominent spiral ridges, the base with ten or twelve less 

 prominent spirals, all with wider, evenly threaded interspaces ; the 

 spiral sculpture crossed only by lines or irregularities of growth ; 

 the absence of any marked shoulder to the whorls is conspicuous ; 

 aperture semilunar ; outer lip moderately thickened, not reflected ; 

 pillar and body with a moderate layer of callus ; the depth of the 

 throat, the outer lip at the margin, and the pillar tinged with pur- 

 plish brown, the rest white ; pillar slightly tortuous, not pervious ; 

 canal very short, wide, slightly recurved, with a moderate fasciole. 

 Lon. of shell (decollate, leaving four whorls), 104; of last whorl, 80; 

 of aperture, 62 ; maximum diameter of shell, 60 ; of aperture, 32 mm. 

 The total length was originally about no mm. 



Station 4804, in 229 fathoms, Okhotsk Sea, June 24, 1906. U. S. 

 Nat. Mus., 111,483. 



Remarkable among the species of the liratus group, to which it 

 belongs, by the absence of any shoulder to the whorl and the incon- 

 spicuous suture. 



