VELIFERA.—LIMAX, _ 347 
Shell imperforate, subglobose, very thin, dark greenish-brown, of 3 whorls ; greater diameter 6, lesser 5, height 
3 millim, ; aperture rounded, slightly oblique, with simple peristome, ? of the height of the shell. 
Animal greenish, with blackish bandlets at the sides. 
Hab. Centrat Costa Rica: tlanks of the Pico Blanco, 3000 feet (Gabé ! 2). 
LIMAX. 
Limaz (Linn.), Férussac, Hist. Nat. Moll. Terr. i. p. 66 (1819); Fischer & Crosse, Miss. Scient. 
Mex., Mollusca, i. p. 178. 
Slug, with internal calcareous, flat (not spiral), somewhat asymmetrical shell inside 
the mantle (shield), which covers the anterior part of the body; pulmonary orifice on 
the right side, in the hinder half of the mantle. No caudal mucous pore. Jaw 
smooth, with median projection. Marginal teeth of the radula spiniform. 
Subgen. Hypro.imax. 
Hydrolimax, Malm, in Géteborgs Vetensk. Samhilles Handl. x. p. 79 (1868) ; Westerlund, Fauna 
Moll. Terr. et Fluv. Sueciz, Norvegie, et Dani, p. 24 (1873). 
Mantle (shield) nearly or quite covering half the length of the body, with faint 
concentric wrinkles; posterior half of the body not distinctly keeled. Generally 
unicolorous. 
Geographical distribution almost universal. | 
Prof. H. Simroth unites this division with Agriolimax, Morch, type L. agrestis, L., 
on account of the similarity of the anatomical structure ; the external aspect, however, 
and the water-loving habits of the species induce me to maintain it. The same author 
states that the reproductive generative faculty begins very early, before the animal is 
full-grown, and he has found several specimens, from Germany, Guatemala, and 
Madagascar, on anatomical examination to have well-developed female organs, but no 
male ones (perhaps proterogyne). 
1. Limax leyis. 
Limax levis, O. Fr. Mill. Verm. Terr. et Fluv. ii. p. 1 (1774)*; Jeffr. Brit. Conch. v. p. 156°; 
Westerl. Fauna Moll. Terr. Suecize, Norveg. et Daniz, p. 24°; Lehmann, Lebende Schneck. 
und Muscheln Stett. p. 42, t. 8. fig. 10 (anatomy) (1873) °. 
Agriolimax levis, Simroth, Zeitschr. f. wiss. Zool. xlii. pp. 22, 222, 327, t. 7. fig. 17 (anim.), t. 9. 
figg. 16-22 (anatomy) °; Jahrb. Deutsch. malak. Ges. xiii. p. 30 (1886) °. 
Limax brunneus, Draparn. Hist. Nat. Moll. Terr. et Fluv. Fr. p. 128 (1805) *; Forbes & Hanley, 
Hist. Brit. Moll. iv. p. 20, i. t. F. F. F. fig. 4 °; Heynem. Malak. Blitt. xix. p. 148 (with 
figure) (1872) ’. . ' . . 
 Limax campestris, Binney, Proc. Bost. Soc. Nat. Hist. i. p. 52 (1841) ; Terr. air-breath. Moll. 
N. Am. ii. p. 41, t. 64. fig. 3"; Land and Freshw. Shells N. Am. i. p. 66, fig. 108"; Man. 
Am. Land-Shells, p. 287, fig. 257 *. Proc. Acad. Phil. 1875, p. 176, t. 4. figg. 5 a, b,¢ 
44* 
