TO GEOLOGY. 151 



ficulneus* (Lamarck), but differs in having no fold on the 

 columella and being without those on the whorls. The 

 superior whorls of the Fittonii are disposed to be biangular, 

 which character is lost on the last whorls, the superior part 

 of which is disposed to be canaliculate. 



F. parvus. Plate 5. Fig. 157. 



Description. Shell ovately fusiform, smooth, somewhat 

 elevated in the spire ; substance of the shell thick ; spire 

 rather elevated and pointed at the apex ; suture linear ; 

 whorls six, above slightly convex; columella twisted; 

 canal short, oblique ; mouth lunate. 

 Length .4, Breadth .2, of an inch. 



Observations. A single individual only of this species 

 and that not entirely perfect, has come under my notice. 

 It forms a natural link between the last described and that 

 which follows. The spire is more elevated than the 

 Fittonii, and it differs in not having granulations, as it 

 dose also in the columella. 



F. minor. Plate 5. Fig. 158. 



Description. Shell fusiform, smooth, elevated in the 

 spire ; substance of the shell rather thin ; spire elevated 

 and pointed at the apex ; suture linear ; whorls six, very 



* Murex turgidus, Brander, plate 4, fig. 51. Fusus ficulneus, Sowerby, 

 Min. Conch, plate 291. 



