128 siPHo. 



which he has not seen. It is possible tliat the two are identical, 

 and that lividus should be expunged from the genus Sipho. It 

 must be considered a very doubtful species ; I am not aware of 

 anything like the figure in the American Seas, and cannot help 

 thinking that the illustration is a bad one. 



S. Sarsii, Jellreys. Tl. 52, tigs. 322, 323. 



Spirall}' costulate, clathrate by narrow, undulated growth-lines. 

 White, epidermis pallid olivaceous. Length, 54 mill. 



Soutliern Norioegian Coast ; 106 fathoms. 



Outline somewhat like that of the next species, but the spire is 

 more elevated and the whorls rounder; sutures, consequently, 

 deeper. 



S. VENTBicosus, Gra3^ PL 52, fig. 324. 



Shell rather thin, inflated, spire short ; epidermis light olive. 



Length, 1*5-2 inches. 



Ba n ks of Nc wfouii dland . 



FusKS driatus, Reeve, is supposed by Kobelt to =tliis species, 

 but I think it more closely allied to F. Stiitvpaoni^ Morch. 



S. LACHESis, Morch. PI, 51, fig. 312. 



Pinkish white under a coriaceous epidermis. Length, 41 mill. 



Greenland ; Fiumark. 



S. VebkriIzeni, Kobelt. PI. 52, fig. 325. 



Shell solid, nearly smooth ; canal very short ; columella strongly 



callous below. Epidermis smooth, greenish yellow. 



Length, 2 inches. 



Northern Norway. 



Totally dirterent from all the other species in its Bullia-Vike. 



aspect, want of striaj and short canal. The radula and operculum 



are those of Sijjho, otherwise its generic position would be very 



doubtful. Kobelt suspects that Chemnitz had this shell before 



him when he assigned Norway as a habitat for Bullia polita. 



S. ROSEUS, Dall. PI. 52, fig. 329. 



Shell small, of a rosy color when fresh, smooth to the touch, 

 elegantly proportioned. Whorls six, well-rounded but not in- 

 flated ; suture distinct ; apex not mammillate, but evenly and 

 elegantly rounded ofl". Sculpture consisting of delicate, evenly- 



