78 LIMACID^. 



NENIATLANTA, Bourg. Peristome feeble; under lamella par- 

 allel to the upper. 2 sp. Pyrenees. 



DiSJUNCTARiA, Bottger. G. oligogyra, Bottger. Eocene. 



MACROPTYCHiA, Bcittger. G. Sennaariensis, Pfr. N. E. Africa. 



BOETTGERiA, He3'nem., 1861. G. crispa, Lowe, and C. deltostoma, 

 Lowe. Madeira. 



OLYMPiA, Vest, 1861. C. Olympica^ Friv. Mt. Ol3^mpus. 



Family LIMACfDJE. 



Shell rudimentary, a calcareous plate, not spiral, concealed 

 under the mantle, and covering the respiratory cavity. Foot 

 with or without mucous pore ; jaw oxygnathous, arcuated, without 

 ribs, with a rostriform projection on tiie inferior margin (xiii, 

 62) ; lingual plate with tricuspidate central tooth, the middle 

 cusp long and narrow, laterals bi- or tricuspidate, marginals 

 narrow, sharp uni- or bicuspidate (xiii, 61). The slugs are often 

 crepuscular in their habits and are chiefly herbivorovis, although 

 sometimes taking decajing animal substances. They inhabit 

 woods and gardens, coming forth after showers or when the dew 

 is on the ground. In the United States several species are com- 

 monly found in the cellars of houses. Some of the limaces occa- 

 sionall}^ climb small trees or bushes and suspend themselves 

 from the branches or leaves hy a glutinous thread. 



For the generic descriptions of the slugs of this and the fol- 

 lowing families I am indebted to Mr. William G. Binney, of 

 Burlington, N. J., to whom I am also under many obligations 

 for advice upon the treatment of some of the shell-bearing 

 pulmonates. 



LiMAx, Linn., 1158. 



Distr. — 100 sp. Universally distributed. L. alpinus^ Fer. 

 (ci, 56). L. Lartetii^ Dupuy (ci, 5t). 



Animal attached its whole length to the foot, subcylindrical, 

 tapering behind, bluntly truncate anteriorly ; tentacles simple ; 

 mantle small, anterior, enclosing a shelly plate ; no longitudinal 

 furrows above the margin of the foot, nor caudal mucous pore ; 

 a distinct locomotive disl?; ; external anal and respiratory orifices 

 at tlie right posterior margin of the mantle ; orifice of combined 

 generative organs behind and below the right peduncle. 



Shell-plate testaceous, thin, flat, longer than wide, with con- 

 centric strife of increase, internal. 



Jaw smooth, with median projection. Lingual membrane long 

 and narrow ; central teeth tricuspid, laterals bicuspid, marginals 

 aculeate, often bifid. Considerable variation is found in the 

 dentition of the genus ; the centrals and lateruls are sometimes 

 unicuspid. 



The following generic and subgeneric names have been sug- 



