HELIX. 95L 



Helix tiirrita crenulata. Chemnitz, ix. part 2. p. 165. 1. 135. 



f. 1230. 

 Bulimus torulosus. Bruguiere Enc Metli. p. 332. 



Inhabits fresh-water pools in Madagascar. Bniguiere. 



Shell two and a half inches long, and about eight lines broad, 

 covered with a blackish brown epidermis, beneath. which it is 

 white without any coloured markings ; it has ten or eleven 

 slightly convex whirls, which are obsoletely striated trans- 

 versely, particularly on the lower whirls, and each has a cre- 

 nated belt at its upper extremity. 



Fuse ATA. 145. Shell turreted, shining, brown, with 

 the whirls minutely striated transversely, and 

 the aperture bluish. 



Helix fuscata. Born Mns. p. 390. 1. 16. f. 17- Gmelin, 



p. 3654. 

 Helix ater. Chemnitz, ix. part 2. p. l64. 1. 135. f. 1229. 

 Helix, No. 211. Schroeter Einl. ii. p. 326. 

 Bulimus fuscatus. Bruguiere Enc. Meth. p. 332. 

 Lister Conch, t. Il6, f, 11. 



Inhabits the East Indies, in fresh water. Chemnitz. 



Shell about two inches long, and seven and a half lines in dia- 

 meter, of a shining blackish brown colour, with ten or eleven 

 minutely striated whirls. I rather doubt whether this is 

 more than a young shell of Strombm ater ; and Bruguiere 

 has quoted the same figure of Lister's for his Bulimus tere- 

 bralis and Bulimus fuscatus. 



CONTORTA-PLICATA. 146. Shell turbinated, grey, 

 perforated, sub-truncated, with tive whirls, of 

 which the two uppermost are depressed. 



Helix contorta-plicata. Gmelin, p. 366l. 



Hehx, No. 171. Schroeter Einl. ii. p. 119- 



Nerita contorta. Muller Ferm. ii. p. 187. Schroeter 



Fluss. p. 354. 

 Argenville, t. 28. third fig. 5. ? Martini Berl. Mag. iv. 



t. g. f. 44. 



Inhabits muddy ditches in Denmark; very rare. Muller. 



Muller says that he never found more than one shell of tliis 

 species, and that it was without an animal ; he has described 

 it to be two lines and two-thirds long, and a line and a half 

 broad, pyramidal, squalid, opake, with five whirls, of which 

 the two uppermost are so depressed as to give the shell a 

 truncated appearance ; aperture roundish. It is probably a 

 2b 2 



