154 SMITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. 50 



Station 4863, in 260 fathoms, off Korea, July 31, 1906; U. S. Nat. 

 Mus., 110,481; also at stations 4868, in 150 fathoms, off Korea, 

 and 5049, in 182 fathoms, east coast of Nippon. 



This form differs from insularis proper by its rounded whorls, 

 which do not slope away from in front of the suture, which is em- 

 phasized as if constricted, and by its more emphatic spiral sculpture 

 and larger size. 



CHRYSODOMUS VARICIFERUS Dall, n. sp. 



Shell large, very thin in proportion to its height, with six or more 

 rounded whorls ; spire short, conic, apex submammillate, whorls 

 rapidly increasing; sculpture of (on the last whorl about seven) 

 sharp, thin, very prominent varices, but little reflected, though pro- 

 jecting 10 to 12 mm. from the whorl; spiral sculpture, on the apical 

 whorls, of three or four obsolete ridges subequal and distant, the 

 middle one on the periphery, and faint spiral threads over and be- 

 tween them ; on the later whorls this is obsolete, and the last whorl 

 often shows no spiral sculpture or only faint indications of any ; aper- 

 ture wide, narrow behind and in front, a thin callus on the body and 

 pillar, the outer lip expanded, sharp ; pillar narrow, twisted, with a 

 very prominent siphonal fasciole ; canal short, slightly recurved. 

 Lon, of shell, 186; of last whorl, 146; of aperture, 117; maximum 

 diameter, including varices, 118; of aperture, 61 mm. 



Station 5021, on the east coast of Sakhalin Island, and various 

 stations in the eastern part of Bering Sea. "Type, U. S. Nat. Mus., 

 110,482. 



Most likely to be confounded with the smaller and heavier C. 

 fornicatus Gray. 



CHRYSODOMUS (PERICOCHLION Schrenck, var?) PARALLELUS 



Dall, nov. 



Pilsbry, Acad. Nat. Sci. Phila., Proc. 1901, p. 391, pi. xx, fig. 23. 



This form is more elongate, with the same number of whorls, the 

 channel at the suture is wider, the whorls more tabulate and parallel- 

 sided than the typical pcricochlion of Schrenck. These differences 

 were observed by Pilsbry, but might have been ascribed to individual 

 variation when known only from two specimens ; but, a number of 

 specimens having been obtained from Hirase and the Albatross 

 dredgings, all agree with each other and with Pilsbry's figure in 

 these differences ; so that the presumption is strong that a different 

 race or variety is indicated, or possibly a different species. A large 

 specimen exhibits 7 whorls, having lost about two; it measures 138 

 mm. in length by 48 mm. in greatest width ; the maximum length of 



