816 CLASS XIII. 



Sp. Succinea amphibia DRAP., Helix pwtris L., BLAINV. Malac. PL 38, fig. 

 4, STURM Deutsclil. Fauna, vi. Heft i, PFEIFFER Schn. I. Tab. i. fig. 4, 

 Tab. in. figs. 36 38 ; very common in canals, on water-plants, &c. 



Vitrina DRAP., LAM. (Helicolimax FERUSS.). Body elongate, 

 limaciform ; mantle with an appendage reflected over the shell ; 

 tentacles four, two inferior very short. Shell depressed, small, 

 very thin, imperforate, with spire short. Aperture large, rotundato- 

 lunate. 



Comp. D'AuDEBARD FERUSSAC Naturforscker, Vol. 29, pp. -236 241, 

 Tab. i. 



Sp. Vitrina pellucida DRAP., Helix pettucida MUELL., Vitrina beryllina 

 PFEIFFER, STURM Deutschl. Fauna, vi. Heft 3, Tab. 16, GUERIN Iconogr., 

 Moll. PL 5, fig. 3 ; on water-plants, and on the ground amongst mosses 

 and fallen leaves. 



B. Nuda. Shell none or concealed beneath the mantle, 

 small. Limacina. 



Limax L. Tentacles four. 



Parmacella Cuv. Mantle placed upon the back, emarginate in 

 the middle of right margin, including posteriorly the shell spired 

 obsoletely. Orifice of respiration and vent below a fissure at the 

 right side of mantle, generative aperture between the tentacles of 

 the right side. 



Sp. Parmacella Olivierii Cuv., Ann. du Mus. v. PL xxix. figs. 12 15; 

 Mollusq., Mem. xn. ; BLAINV. MalacoL PL XLI. fig. 3, GUERIN Iconogr., 

 Mollusq. PL v. fig. 5, &c. 



Testacella LAM. Respiratory cavity and vent above the posterior 

 extremity of body. Small mantle situated in the same place, in- 

 cluding a very small shell spired obsoletely at the apex. Aperture of 

 generative organs below the larger tentacle of right side. 



Sp. Testacella haliotidea Cuv., Ann. du Mus. v. p. 440, PL xxix. figs. 6 

 1 1, Mollusq., Mem. xn., BLAINV. Malacol. PL XLI. fig. 2, GUERIN Ico- 

 nogr., Mollusq. PL v. fig. 4. 



Vaginulus LAM. 



Limax LAM. Body oblong, naked, creeping, convex on back, fur- 

 nished anteriorly with a coriaceous, subrugose mantle, and below 

 with a longitudinal flat disc. Branchial cavity under the shield or 

 small mantle, in the anterior part of back. Respiratory orifice and 

 vent placed in the right side ; generative orifice beneath the right 

 tentacles. 



