70 CLAVELLA, BUOCI NOKUSUS. 



Fusus Hvidiis, Phil. (fig. 180), is usually considered identical 

 with this species. 

 Var. HEPTAGONALis, Recve. PI. 40, fig. 181. 



In this variety some of the longitudinal ribs coallesce, so that 

 those remaining are not only fewer in number, l)ut they are also 

 wider. 



0(nius CLAVELLA, Swainson. 



Only one recent species cau be referred propei'ly to this fossil 

 genus, which is the G. i<erotina^ the ty\^& of Hinds' genus Cyrtulus. 

 The three other recent species referred to it by H. and A. Adams 

 are members of other genera : 



C. avellana, Reeve, is a Gronia. Vol. II, p. 180. 



G. distorta^ Reeve, belongs to the Pisaniina?. 



G- subrosfrata, Gray, belongs to the Melon geniinae. 



C. SEROTiNA, Hinds. . PI. 40, fig. 182. 



Pale yellowish or flesh-color ; within light rosy or white. 

 Length, 3'5 inches. 



Nukahica, Murque^as, in fathoms, among sand. 



A thick and heavy shell which would probablj' be equally well 

 placed in Melongeniimie ; or in Turbinellidjv, as some specimens 

 show incipient folds on the columella. 



Genus BTICCINOFUSUS, Conrad. 



The single recent species referred by Conrad to his genus has 

 since been made the type of Boreofusus, Sars — which, of course, 

 becomes a synonym. The dentition, only, separates this from 

 Sipho^ several species of which might be regarded as either iden- 

 tical, or varieties at most. When the lingual armature of these 

 allied forms shall become known their definite position can be 

 ascertained ; at present I prefer to leave them all in Sipho. 



Jeffreys thus describes the animal : 



Body white or cream-color, with a slight tinge of flesh-color; 

 mantle sometimes edged with brown ; pallial tube extensile, 

 occasionally protruded beyond the canal, with an expanded Qr 

 trumpet-shaped opening ; proboscis exceedingly long, measuring 

 nearly two inches even when contracted after the death of the 

 animal ; tentacles conical, rather short, and close together, with 



