GIBBUS. 81 



a contiguous tubercle, and three somewhat basally situated lip- 

 teeth ; peristoine thickened, reflected, thinner and sinuous above. 



Long. 16*5, diam. 11 mill. 



IsL Poulo Condor, Cochin China. 



Type of Mr. Ance}^'s group Oophana. 



Unfigured Species of the Subsection Odontartemon. 



S. CAVICOLA, Gredler. China. 



S. LEONENSIS, Pfeiffer. Sierra Leone. 



S. EBURNEUS, Pfeiffer. Cochin China. 



S. FOOTEI, W. and H. Blanford. India. 



The original description and figures of this species are not 



accessible to me. It is stated to be perhaps a .variety of S. 

 PerotettL 



S. ELISA, Gould. Mergui Archipelago. 



S. BIDENS, Mollendorff. China. 



S. PACHYCHILUS, Mollendorff. China 



Genus GIBBUS, Montfort, 1810. 

 Section GIBBUS (s. stricto). 



G. LYONETIANUS, Pallas. PI. 21, figs. 78, 79, 80, 81. 



Corneous yellow or yellowish white ; parietal wall with a 

 tooth ; umbilicus profound^ rimate. Length, 30 mill. 



Isle of France. 



Gmelin called it Trochus distortus, and Bowdich Pupa modio- 

 linus. 



Var. ANTONI, Pfr. Figs. 80, 81. 



Shell openly umbilicated, parietal wall of aperture toothless. 

 Pupa Grateloupiana, Pfr., is a synonym. 



Var. SINISTRORSUS, Nevill. Shell reversed. Rare. 



Var. OBTUSUS, Pfr. Unfigured. Considered a variety only, by 

 von Martens. 

 6 



