328 PROCEEDINGS OF THE NATIONAL MUSEUM. vor.. 56. 



BUCCINUM PHYSEMATUM, new species. • 



Female shell rather large, thin, inflated, acute, whitish, whorls 

 rapidly enlarging, about six and a half in number, the nucleus decor- 

 ticated, the suture deep, not channelled; spiral sculpture of very 

 numerous somewhat irregular, fine threads, mostly with narrower 

 interspaces and with little or no tendency to fasciculation, an angle 

 at the margin of the base; penultimate whorl with about 16 narrow, 

 retractively arcuate ribs, extenchng from suture to suture with wider 

 interspaces but obsolete on the last whorl; aperture wide, cream, col- 

 ored, the outer lip thin, arcuate, reflected, the body erased, the pillar 

 short, slightly twisted, with a wide, very short canal and moderate 

 fasciole. Height of shell, 60; of last whorl, 47; diameter, 40 mm. 

 U. S. Nat. Mus. Cat. No. 122555. 



Type-locality. — U. S. Fish Commission station 3253, in Bering Sea, 

 in 29^ fathoms, mud. 



This has the aspect of a very large thin B. angulosum, but the 

 minor sculpture is quite distinct. 



BUCCINUM ANGULOSUM, new variety CNISMATOPLEUKA. 



Shell thin, white, variable in height, the type-specimen short, 

 acute, with five whorls exclusive of the (lost) nucleus, separated by a 

 distinct suture; axial sculpture of (on the penultimate whorl 11, on 

 the last whorl 8) stout ribs witli equal (on the spire) or wider (on 

 the last whorl) interspaces: on the spire these extend from suture 

 to suture without special prommence on any one part of the whorl, but 

 on the last whorl they are obsolescent near the suture and on the 

 base, but on the periphery are very prominent, as if pinched and 

 pulled out, rudely and irregularly; the incremental Imes are incon- 

 spicuous; the spiral sculpture is like that of the typical form, fine 

 similar uniform striae now and then fasciculated by deeper grooving ; 

 aperture wide, outer lip flexuous, thin; body erased, pillar short 

 straight, canal wide, deep, recurved with a strong fasciole. Height 

 of shell, 48; of last whorl, 40; diameter, 36 mm. Another specimen 

 measures — height of shell, 47; of last wliorl, 35; diameter (not 

 quite mature), 26 ram. U. S. Nat. Mus. Cat. No. 332759. 



Type-locality. — Point Barrow, Arctic coast of Alaska, on the beach. 

 The second specimen, from between Cape Beaufort and Cape Lis- 

 burne, has on the penultimate whorl 9 and on the last whorl 11 ribs. 

 This variability is common in this species and isolated individuals are 

 often very milike. 



BUCCINUM ANGULOSUM. new variety TKANSLIKATUM. 



Shell of moderate size, thin, somewhat inflated, with about five 

 whorls exclusive of the (lost) nucleus; the suture gently appressed; 



