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 115 rows of teeth. 



Genitalia: "The testicle lies upon the right side, partly 

 concealed by the liver; it is round and lobulated. The epididy- 

 mis is tortuous. The vas deferens is very long t 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 Limax or Anon. 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: "Canada to Florida, west to Iowa and 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 Limax 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 ENDODONTID^:. 



Shell: Ribbed or striated, patuloid, umbilicated; aperture 



*Man, Amer. Land Shells, p. 244. 



