STPHO. 129 



distributed revolving grooves, with wide interspaces, of which 

 there are thirty or forty on the last whorl ; these are crossed by 

 faint lines of growth. Aperture rounded ovate, outer lip thin, 

 columella arcuated, polished, not thickened ; canal very short 

 and wide. Fasciole none. Lcng-th, -9 inch. 



Arctic Ocean. 



The sculpture reminds one of tlie true Fumis Islo7idicus ^vrhich, 

 however, has a long canal. The epidermis is not perceptible, and 

 all the specimens were imbedded in Iuui^js of dense spongy 

 growth. 



The above is Mr. Dall's description. 



S. PRODUCTUS, Beck. PL 52, fig. 320, 



Yellowish white under a brownish epidermis, ponderous, aper 



Cape North, Siberia. 



ture small and narrow. Length, 41 mill 



S. Benzoni, Miirch. PI. 52, figs. S21, 328. 



Thick, ponderous, white, covered with obsolete spiral lira? ; 

 epidermis thin, reddish brown. Length, 32-39 mill. 



Bahia, Brazil. 



I figure, besides the original in the Jour, de Couched., a shell 

 (fig. 328) which Kobelt refers to the same species. The locality 

 is probably an error. 



S. PYGM^us, Gould. PI. 52, fig. 330. 



White, under a yellowish epidermis ; animal white. 

 Length, 15-20 mill. 



Connecticnt, northward to Newfoundland. 



Mr. Verrill has made for this species a subgenus Neptioiella, 

 founded on the peculiarly velvety epidermis and the dentition. 

 The epidermis is, however, no more velvety than in some other 

 species, and the description of the dentition given by Verrill 

 applies ver}^ well to that of Sipho Idandicu^. 

 ""This species is very like H. gracilis, except that it is much 

 smaller. 



