NO. 2295. NEW NORTH PACIFIC MOLLUSES—DALL. 863 



low folds which barely reach the periphery, with narrower interspaces, 

 but are feebly and irregularly revived on the base, especially near 

 the umbilicus; aperture subcircular, hardly interrupted by the body, 

 with a sharp thin margin; height, 5; diameter, 4.5 mm. U. S. Nat. 

 Mus. Cat. No. 205783. 



Tyfe-locality . — U. S. Bureau of Fisheries station 4852, off the 

 coast of Korea (Chosen) in 568 fathoms, mud; bottom temperature, 

 36.6° F. 



MARGARITES PAUPERCULUS. new species. 



Shell coarse, usually more or less eroded, of a yellowish white 

 over a brilliant nacre, with five or more moderately rounded whorls, 

 the nucleus eroded; suture distmct, not appressed; axial sculpture 

 of numerous somewhat irregular narrow close-set ^vrinkles, extending 

 over the whorl from the suture to the verge of the funicular umbilicus ; 

 spiral sculpture of a few spiral lines near the umbilicus; aperture 

 subcircular, oblique, produced above, the lips joined over the body 

 by a layer of enamel; the operculum dark bro^n, multispiral, with 

 8 or 10 turns; height of shell, 9.5; of aperture, 4.5; maximum diam- 

 eter, 11 mm. U. S. Nat. Mus. Cat. No. 109457. 



Type-locality. — Arctic Ocean, north of Bering Strait; collected by 

 Capt. E. Everett Smith. 



MARGARITES (PUPELLARIA) KAMCHATIC13S. new species. 



Shell large, solid, ashy gray, somewhat depressed, with six whorls 

 exclusive of the (lost) nucleus; suture distinct, not appressed; axia 

 sculpture of radiating threads near the apex, soon becoming obsolete 

 and reduced on the last three whorls to somewhat rude incremental 

 lines, slightly sharper and more regular on the base; spiral sculpture 

 of two close and one larger peripheral cord between the sutures on 

 the spire, on the last whorl these occupy the posterior half of the 

 space between the suture and the periphery; in front of them is a 

 space without spiral sculpture reaching to the periphery; on the base 

 between the periphery and the verge of the umbilicus there are 

 about a dozen spiral uniform threads with wider mterspaces decus- 

 sated only by the lines of growth; the interior of the rather wide 

 umbilicus is axially striated; the periphery is rounded; aperture 

 oblique, subquadrate, the margms thin, the body with a thin layer 

 of nacre; the pillar is slightly concavely arcuate. Height of shell, 

 23; of last whorl, 18; diameter, 27 mm. U. S. Nat. Mus. Cat. 

 No. 210275. 



Type-locality. — U. S. Bureau of Fisheries station 3643, on the 

 southeast coast of Kamchatka, in 100 fathoms sand; bottom tem- 

 perature, 31.7° F. 



MARGARITES (PUPILLARIA) HEALYI, new species. 



Shell large, livid yellowish white, with a thm very pale periostracum 

 and about six whorls including a smooth white turbinate nucleus 



