816 CLASS XIII. 
Sp. Succinea amphibia Drav., Helix putris L., Buatnv. Malac. Pl. 38, fig. 
4, SturmM Deutschl. Fauna, vi. Heft 1, PFEIFFER Schn. I. Tab. 1. fig. 4, 
Tab. 111. figs. 36—38; very common in canals, on water-plants, &c. 
Vitrina Drap., Lam. (Helicolimax F¥russ.). 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’AuDERARD Férussac Naturforscher, Vol. 29, pp. 236—241, 
Tab. I. 
Sp. Vitrina pellucida Drar., Helix pellucida MuvEuu., Vitrina beryllina 
PFEIFFER, StuRM Deutschl. Fauna, vi. Heft 3, Tab. 16, GuéRIN Leonogr., 
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. Ldmacina. 
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 Olivierti Cuv., Ann. du Mus. v. Pl. Xx1x. figs. 12—15; 
Mollusqg., Mém. xu.; Buatnv. Malacol. Pl. xt. fig. 3, Guerin Lconogr., 
Mollusq. Pl. v. fig. 5, &e. 
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. TZestacella haliotidea Cuv., Ann. du Mus. Vv. p. 440, Pl. Xxrx. figs. 6— 
11, Mollusg., Mém. xut., Buainv. Malacol, Pl. xu1. fig. 2, GuERIN Ico- 
nogr., Mollusq. Pl. v. fig. 4. 
Vaginulus Lam. 
Limaz 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. 
