126 . SIPHO. 



Var. ATTENUATA, Jeffreys. PL 51, fig. 305. 



u Differs from the type in being narrower, canal not so tortuous," 

 etc. Length, 43 mill. 



Norway; W. Coast of Ireland 1180-1215 fms. (Porcupine 



Exped., 1869) ; Bay of Biscay, 1207 fms. 



S. GLABRA, Yerkriizen. PL 51, figs. 306, 30t. 



I cannot find any characters by which to distinguish this satis- 

 factorily from S. Stimpsoni, Morch the American representative 



of S. Islandicus. Length, 65 mill. 



Coast of Norway. 

 S. JEFFREYSIANUS, Fischer. PL 51, fig. 308. 



Shell differing from that of S. propmquus in being much larger, 

 more ventricose and solid, and in having a conical and shorter 

 spire ; the whorls are more convex, and the last occupies eight- 

 elevenths of the shell ; the ridges of the back of the canal are 

 stronger ; the surface is covered with microscopic spiral striae, 

 which intersect the equally fine lines of growth, so as to produce 

 a slight and partial decussation ; The epidermis is membranous 

 and deciduous, fibrous near the outer lip, never hispid, and of a 

 brownish yellow color ; the alternation of size in the spiral ridges 

 gives a lineated appearance to that part of the epidermis on the 

 body-whorl which is of a paler color aud situated below the 

 periphery ; the canal is proportionally shorter, much wider, and 

 more open ; the outer lip is sinuated in the middle ; operculum 

 amber-eolor. Length 2*25 inches, breadth 1*15 inches. 



English Coast to Bay of Biscay ; coralline zone. 



The description above is copied from Jeffreys, who first de- 

 scribed -the species under .the name of Fusus Buccinatus, Lam., 

 which is, however, an EutTiria. 



S. STIMPSONI, Morch. PL 51, figs. 309, 310, 313 ; PL 52, fig. 311. 

 This is the North American representative of S> Islandicus, 

 and it has generally been confounded with that species ; it is, 

 however, more ventricose, with a shorter, wider and more curved 

 canal. It is a robust shell, with a dark, rough epidermis. 



Long Island to Massachusetts, northwards to Labrador ; 



deep water. 



The animal is white, with small, irregular black specks ; e} r es 

 black ; foot rectangular, angles rounded. 



