910 HELIX. 



coRNU-ARiETis. 54. Shell smooth, concave on one 

 side, and strongly umbilicated, with four 

 striated whirls ; aperture oval, dilated. 



Helix Cornu Arietis. Linnaus Si/st. Nat. p. 1244. Born 

 Mus. p. 373. Schroeter Fluss. p. 230. t. 9- f. 13, and 

 Einl. ii. p. 139- Chemnitz, ix. part 1. p. 109- t. 112. f. 

 932 and 953. Gmelin, p. 3625. 

 Planorbis contrarius. MuUer Verm. ii. p. 152. 

 Planorbis Arietis. Lamarck Syst. des Anim. p. 94. 

 Lister Conch, t. 136. f. 40. Petiver Gaz. t. 92. f. 4. 

 Klein Ost. t. 1. f.7. Knorr, i. t. 2. f. 4 and 5. Seba, iii. 

 t. 39. f. 14 and 15. Geve, t. 3. f. 9 to 13. 

 Inhabits rivers in Europe. Linnceus. Brazil. Petiver. Mo- 

 lucca Islands, Amboyna, and China. Chemnitz. Madrass 

 and Jamaica. Humphreys. 

 Shell about three-quarters of an inch, or sometimes an inch and 

 a quarter, in diameter, of a whitish colour, with from three 

 to seven red bands of different breadths ; it has four striated 

 whirls, of which the outer increases rather rapidly in size to- 

 wards the aperture. The shell which my friend Mr. Brookes, 

 in his Introduction to Conchology, has figured under this 

 name, appears to me to be more nearly allied to H. Oculus- 

 Capri. 



CORNU-VENATORIUM. 56. Shell with the spire much 

 depressed, and the base strongly umbilicated ; 

 aperture roundish, and the lip notched near 

 its junction with the whirl. 



Helix Cornu venatorium. Chemnitz, ix. part 2. p. 104. t. 



127. f. 1132 and 1133. Gmelin, p. 3641. 

 Le Veritable Cornet de Chasseur. Favanne Cat. Rais.p.5. 



1. 1. f. 14. 

 Lister Conch, i. 1055. f. 4. ? 



Inhabits 



Shell about an inch in diameter, white, and the center whirl of 

 the depressed spire is brownish ; the base is concave, and 

 forms a broad umbilicus, in which every whirl is visible ; the 

 aperture is round, and there is a notch on the margin of the 

 outer lip near its lower junction with the body-whirl. 



ERICETORUM. 56. Shell fiattish above, with six 

 wrinkled whirls, which are convex, and 

 strongly umbilicated at the base. 

 Helix Ericetorum. Muller Verm. ii. p. So. Chemnitz, 



