DAM,] NEW SPECIES OF SHELLS 151 



which is usually more or less eroded ; at the shoulder is a similar 

 spiral and sometimes one or two fainter ones in front of it ; the 

 remaining sculpture is entirely fine spiral threads with narrower in- 

 terspaces, crossed by incremental lines, while on both lines and 

 threads the lamellae of the periostracum project from the surface in 

 a dense velvety coating ; aperture milk-white, the body and pillar 

 heavily callosified ; outer lip thick, expanded, excavated behind : 

 pillar twisted ; canal wide, deep, recurved, forming a very prominent 

 fasciole ; operculum large, concave, subcircular, the nucleus sub- 

 central. Lon. of shell, 70; of last whorl, 50; of aperture, 35; maxi- 

 mum diameter, 36 mm. 



Station 501 1, in Aniwa Bay, southern Sakhalin, in 42 fathoms; 

 U. S. Nat. Mus., 110,535; a l so m Tsugaru Strait, north Japan, in 

 300 fathoms. U. S. Xat. Mus., 110,536. 



This coarse and heavy shell has the general form of B. viriditm 

 Dall, of the deep water of the California coast, but has finer minor 

 sculpture, a much coarser periostracum, and is in every way a 

 rougher and more solid species, attaining a larger size. At first 

 sight it suggests an Ancistrolepis, but the animal and operculum are 

 truly buccinoid. 



BUCCINUM PEMPHIGUS Dall, n. sp. 



Shell large, thin, swollen, pale olivaceous, with a smooth periostra- 

 cum over a white chalky layer underlaid by a flesh-colored sub- 

 stratum, with about seven whorls; suture appressed, the surface of 

 the whorl sloping rapidly away in front of it to a small sharp carina 

 which marks the shoulder of the whorl, beyond which the whorl is 

 globosely rounded ; there is no axial sculpture except incremental 

 lines; the spiral sculpture consists of low, flattish threads, more or 

 less alternated in size, a few between the shoulder and periphery 

 somewhat more prominent than the rest, but not elevated, having 

 wide striated interspaces, while those in front of the periphery are 

 smaller, closer, and pretty regularly alternated in three sizes ; aper- 

 ture wide, white, the body pinkish, the anterior end of the pillar 

 .suffused with yellow ; outer lip thin, slightly expanded and flexuous ; 

 body with glaze over the pink substratum ; pillar straight, its edge 

 gyrate, completely pervious ; canal short, wide, recurved, with a faint 

 fasciole ; operculum thin, yellowish, with the nucleus sublateral in 

 the posterior third. Lon. of shell, S, 63: of last whorl, 48; of 

 aperture, 37 ; maximum diameter, 37 mm. The females are some- 

 what stouter and shorter. 



Station 4797, in 682 fathoms, off Dalnoi Point, Kamchatka, June 

 20, 1906. U. S. Nat. Mus., 110,537. 



