HELIX.— Plate LXXVIII. 



RivoLi's Helix, tibell very broadly umhilicatcd, ob- 

 loug-disi'oid, peculiarly eumjirLSscd, llally concave at 

 the upper part, rib-like striated, reddish-olive, smooth 

 and shilling beneath ; whorls Kvc, rounded, the last 

 a little descending ; umbilicus very large, perspective; 

 aperture very oblique^ somcwliat square, rather trum- 

 pet-shaped ; lip thickened, reflected, margins joined 



i)y a wliitish callosity emitting a strong entering 



lamella. 

 Deshayes, Encyclopedic Methodiijue, vol. ii. p. 208. 



Uelue carahimtta, Fenissac. 

 Hab. Ceylon. 



Of a peculiar discoid growth, concave on both sides and 

 singularly distortcdly compressed. 



