78 LIMACIDA. 
NENIATLANTA, Bourg. Peristome feeble; under lamella par- 
allel to the upper. 2sp. Pyrenees. 
DISJUNCTARIA, Bottger. C. oligogyra, Bittger. Kocene. 
MACROPTYCHIA, Bottger. C. Sennaariensis, Pfr. N. E. Africa. 
BOETTGERIA, Heynem., 1861. C. crispa, Lowe, and C. deliostoma, 
Lowe. Madeira. 
OLYMPIA, Vest, 1867. C. Olympica, Friv. Mt. Olympus. 
Famity LIMACID A. 
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 the 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 herbivorous, although 
sometimes taking decaying animal substances. They inhabit 
woods and gar dens, 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- 
sionally climb small trees or bushes and suspend themselves 
from the branches or leaves by a glutinous thread. 
For the generic descriptions of the slugs of this and the fol- 
lowing f 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., 1758. 
Distr.—100 sp. Universally distributed. LZ. alpinus, Fer. 
(ci, 56). LZ. Lartetit, Dupuy (ci, 57). 
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 disk; external anal and respiratory orifices 
at the 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 striz 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 laterals are sometimes 
unicuspid. 
The following generic and subgeneric names have been sug- 
