130 siPHO. 



* * SMI longitudinally plicate, decussated by revolving lirm. 



S. Kroyeri, M.iller. PI. 53, figs. 333-336, 349-351. 

 Greyish white under a smooth, thin, brownish epidermis. 

 Length, 91 mill. 



Circumpolar; Greenland ; Behring''s Sea ; Spitzbergen ; 



Labrador; Banka of Newfoundland, 



In addition to the t3'pical form 1 figure, from Kobelt, a stout 

 variety collected by Dall at Unalasehka. Among the synonyms 

 are S. (Bucc.) tortuosus. Reeve (fig. 349), S. arcticvs, Phil. (fig. 

 336), and »S'. cretaceus. Reeve (fig. 350 ), and, possibly, S. scalari- 

 formis, Beck. .S. plicatus, A. Ad.' (fig. 351), from Japan, is 

 apparently the same species. 



S. FENESTRATUs, Turton. PI. 53, figs. 337-339. 



Shell rather thin, semi-transparent ; epidermis rather thin, 

 brownish yellow, rising into numerous fine })rickles on the spiral 

 striae. Length, 1*7 inches. 



Nortoay ; Ireland; NewfoundUtnd ; 40 to 160 fathoms. 



S. LATERTCEUS, Moller. PI. 53, figs. 340-342. 



Light reddish brown. Length, 25 mill. 



Greenland ; Norway. 

 S. BRUNNEUS, Ball. PI. 53, fig. 343. 



Nearly allied to the preceding, but with smaller and higher 



plications more plaiuly developed on the last whorl. 



Length, 18 mill. 



Beliriity''s Sea ; 10 fatboms. 



S. PELLUCIDUS, Hancock. PI. 53, fig. 344. 



Yellowish horn-color, pellucid. Length, '37 inch. 



West Coast of Dads' Strait. 



Only one specimen dredged, thirty-five years ago; has not 

 since l>een recognized. May l)e a Bela or even a Tro/ihrni, ])ut 

 is compared b}- Hancock with Fusati Jnhnidiciia. 



S. viRENs, Dall. PL .53, fig. 347. 



Shell small, similar to /ST. hi'uaneus in general characters, but 

 covered with a grass-green epidermis, tinged with light brown in 

 some specimens. The canal is more clearly defined ; aperture 

 much shorter and rounder, ridges and grooves less prominent 



