894 HELIX. 



Inhabits Tranquebar. Chemnitz. 



Muller has described the diameter to be ten lines, and Chem- 

 nitz says it varies from an inch to an inch and a quarter ; it 

 has five thin pellucid whirls of a pale yellowish colour, with 

 a reddish band joined to a white one at the margin, and the 

 base is convex ; Chemnitz says it is only slightly keeled, and 

 that it has longitudinal as well as transverse strize ; the um- 

 bilicus is deep, and of a reddish brown colour. Gmelin has 

 also given the name of H. exilis to Kaemmerer's t. 12. f. 3, 

 which is too uncertain a species to be retained. 



VERMicuLATA. 17. Shell imperforate, nearly glo- 

 bular, rough with minute elevated dots, and 

 very slightly keeled ; outer lip white and re- 

 flected. 



Helix vermiculata. Muller Verm. ii. p. 20. Chemnitz^ 



ix. part 2. p. 120. t. 129. f. 1 148. a, b, and c. Gmelin, 



p. 3616. 



Fetiver Gaz. t. 52. f. 11. Gualter, t. 1. f. G. Favanne, 



t. 64. f. K 2, and K 3. 



Inhabits the sandy banks of rapid streams in Italy. Muller. 



Pisa. Petiver. Portugal. Chemnitz. 

 This shell is described to vary from ten to thirteen lines in dia- 

 meter, is generally rough with minute white dots, and varie- 

 gated with from one to four reddish bands ; both sides are 

 convex, but the apex is a little flattened, and there are five 

 whirls. Chemnitz doubts whether it is more than a Variety 

 of H. Lucorum. 



INCARNATA. 18. Shell umbilicated, sub-globular, 

 slightly keeled, with six horn-coloured whirls, 

 and the outer lip flesh-coloured. 



Helix incarnata. Muller Fermium, ii. p. 63. Chemnitz, 

 ix. part 2. p. 151. t. 133. f. 1206. Gmelin, p. 36l7. 



Schroeter Erdconch. t. 2. f. 18. 

 Inhabits woods in Denmark ; rare. Muller. Germany. 



Schroeter. 

 Shell half an inch in diameter, and very convex above, with six 



whirls ; it is of a horn-colour, with a whitish keel on the 



body-whirl, and becomes of a yellowish red towards the 



aperture ; umbilicus narrow. 



CANTiANA. 19. Shell umbilicated, very slightly 

 keeled, rather depressed, with six striated 

 whirls, and the umbilicus small. 



