26 



TESTACELLIDtE. 



TESTACELLA. Cuvier. 



Animal elongated, semicylindrical ; disk covering, and 

 combined with the entire upper surface of the body, which 

 bears an external, auriform, compressed shell, with a minute 

 spire, at the hinder extremity of the back. Head with 

 four tentacula, the upper ones bearing the eyes. Pul- 

 monary orifice under the right side of the shell, the vent 

 very near it. Reproductive orifice behind, and near the 

 right superior tentacle. 



We regard this genus as the type of a family interme- 

 diate between the slugs and the snails. The Testacellee are 

 subterranean in their habits, approaching the surface of the 

 ground, or crawling upon it in autumn, and descending to 

 a depth of one or two feet below the soil in winter. They 

 are carnivorous, devouring worms and slugs. 



T. haliotoidea, Draparnaud. 



Plate G.G.G. fig. 1. 



Testacetla haliotidea, Draparn. Moll. Terr, et Fluv. France, p. 130, pi. 59, 

 f. 17 ; 121 (in part), pi. 8, f. 44, 45 ; and Animal, pi. 9, 

 f. 12, 13. — Fleming, Brit. Anim. p. 257. — Brown, 

 Illust. Conch. G. B. p. 54, pi. 18, f. 15, 16.— Civier, 

 Ann. du Mus. vol. v. pi. 35, f. 4. — Sowerby, Conch. 

 Manual, f. 2G 1 . 



Testaeellus Europaus, Montfort, Conch. Syst. vol. ii. p. 95. 



