; 
y 
THE NATURAL HISTORY SURVEY. 203 
cutting points of the cusps being very broad and oblique, and 
bearing one or two small outer side cusps. (Fig. 46). There 
are about II5 rows of teeth. 
Genitalia: ‘‘The testicle lies upon the right side, partly 
concealed by the liver; it is round andlobulated. The epididy- 
mis is tortuous. The vas deferens is very long, tortuous, and 
muscular. It joins the penis sac at its summit, and has the 
retractor muscle inserted into the length of the penis above 
the latter. The penis sac is irregularly cylindrical, bent at its 
summit. The ovary is exceedingly lobulated. The oviduct is 
tortuous, wide, and very much sacculated. The prostate gland 
is longer than in Lzmax or Arion. The generative bladder is 
large, globular, or nearly so. Its duct is rather less than half 
the length of the oviduct. At its junction with the neck of the 
latter an oval muscular organ exists, the dart sac. Within the 
latter, at the bottom, is a hemispherical papilla, upon the sum- 
mit of which is placed a white, calcarate dart. At the junction 
of the vagina, common to the neck of the oviduct, duct of the 
generative bladder, and dart sac, with the penis, there are two 
short retractor muscles inserted. The cloaca is narrow and 
cylindrical, and has surrounding two-thirds of its middle a 
thick, glandular organ. Interiorly the penis sac, cloaca, etc., 
have a longitudinal rugose surface.” (W. G. Binney.)* 
Distribution: ‘‘Canadato Florida, west to lowaand Texas.” 
( Pilsbry.) 
Geological distribution: Unknown. 
Habitat: Under the bark of decaying trees, in forests of 
more or less density. Solitary in habit. 
Remarks: This species is quite variable in coloration, 
some having the spots regularly arranged in rows, others 
clouded, and still others blackish, grayish, or whitish, with 
spots, dots or lines of color. Unlike Lzmax this species has no 
slit from the respiratory opening to the edge of the mantle, 
but has a furrow or canal of considerable depth. It ascends 
trees to a height of over fifty feet, and is most frequently found 
under bark which has become ‘‘started.’”’ So far as known it is 
restricted entirely to the northern region, and has only been 
found at Bowmanville. 
FAMILY ENDODONTIDz, 
Shell; Ribbed or striated, patuloid, umbilicated; aperture 
*Man. Amer. Land Shells, p. 244. 
