FUSING. 61 



shoulder, and unicolored. The dentition of this species was 

 ascertained by Troschel to be fasciolarioid, on which account he 

 founded for it a new genus, Aptyxis; it has more recently ap- 

 peared, however, that an undoubtedly genuine Fusus and the 

 only one of which the dentition has been hitherto examined, 

 possesses the same t}~pe of dentition (see F. inconstans, Lischke, 

 PI. 25, fig. 1), so that Aptyxis cannot hold. 



F. ROSTRATUS, Olivi. PI. 37, figs. 147-150. 



Yellowish to reddish brown, spirally corded with sharp, narrow 

 ridges, which become prickly on the ribs, and form a sharp series 

 of tubercles, defining a somewhat convex shoulder ; interstices of 

 the main ridges each provided with a smaller ridge and scabrous. 



Length, 1 to 1'75 inches. 



- Mediterranean ; Canary Islands. 



Rather common in deep water, from 20 to 100 fathoms, upon 

 corals and rocks. Fossil, miocene and pliocene, South of Europe. 

 I have described the fully developed form, with carina, but this 

 is often obsolete, so that the contour of the body-whorl is almost 

 regularly rounded. To the latter belongs Reeve's F.fragosus, 

 (fig. 148), to the former his F. ccelatus (fig. 149), is certainly very 

 nearly related. 



F. CCELATUS, Reeve. PI. 37, fig. 149. 



Whitish ; sculpture sharp and delicate. Length, 2*25 inches. 



Hob. unknown. 



Except in its larger size it is not essentially different from F. 

 rostratus. 



F. BRUIJNII, Tapparone-Canefri. 



Elongately fusiform, sub-umbilicate, reddish brown ; spire elate, 

 apex somewhat acute ; whorls nine, convex, with impressed 

 sutures, closely encircled with squamous lirae crossing nine or 

 ten longitudinal ribs ; rounded, the last whorl obscurely sub- 

 angulate ; aperture ovately-subquadrate, crenulate at margin of 

 lip, sulcate within ; lip and columella margined with a vivid 

 reddish tint, otherwise white within ; canal moderate, not equalling 



the spire. Length, 40 mill. 



Papuan Islands. 



