384 



The figure given by Chemnitz, we have referred to, 

 with doubt, as ii appears to be more regularly, and 

 ftrongly ftriated longitudinally, and feems to poffefs a 

 fulciw or groove in the pillar lip, as well as expofing 

 more of the Columella: that author, however, quotes 

 Walker's (hell. 



If it fliould be H. neritoidea in a depauperated flate, 

 it may alfo be the Bulla velutina of Muller Zool. Dan. 



Animal whitifli, with two fhort, fetaceous tentacula; 

 and two eyes placed at their bafe behind : Jujientaculum 

 broad, oval. 



12. 

 Detrita. Helix detrita. Piilt. Cat. Dorfd. p. 49. 



Tab. 11. f. 1. Chan. Conch, ix. t. 134. f. 1225. a. d. 



Gmel. Syfi. p. 3660.— Gualt. .t. 5. N. 

 Muller Verm. ii. p. 101. No. 300. 

 Turt. Lin. iv. p. 53S. 

 Schroet Erdconch. p. 21. t. 1. f. 1. 

 Id. Flujfcor.ch. p. 324.— t. Mi?i. A. f. 4. 

 Helix acuta. Gmel. Syjl. p. 3660. 136. 



Turt- Lin. iv. p. 538. — Gualt. t. 4. f. N. 

 Muller Verm. ii. p.lOO. No. 297. 

 Chem. Conch, ix. t. 134. f. 1224. No. 1. 2. 

 Favan. t. 65. A. 5. 



H. with a fub-pellucid, conic fliell, tapering to a 

 moderately fine point : volutions fix, not much elevated, 

 but a little rounded, and well defined by the feparating 



line : 



