THE NATURAL HISTORY SURVEY. 195 



is elongate-conical (agrestis) and in others spiral (campestris); 

 ovary large, white, semi-elliptic, more or less curved and lobu- 

 lated, placed at the summit of the oviduct, which is a long, 

 wide, soft, white, tortuous, sacculated tube, passing from the 

 ovary to the vagina; generative bladder generally large, pointed 

 and oval, opening by a short, wide duct into the vagina; in 

 agrestis it is large, elongated, oval, and opens by a short duct 

 into the angle formed by the junction of the vagina with the 

 male portion of the generative apparatus; in campestris it is a 

 small oval sac, with a longer, narrow duct, opening into the 

 tube leading from the penis to the cloaca.* The character of 

 the generative apparatus differs considerably in the various 

 species, and will be treated under each. 

 Distribution : World-wide. 



KEY TO SPECIES OF LIMAX AND AGRIOLIMAX. 



A. Slug large. 



a. Tubercles inconspicuous; color arranged on body in 



longitudinal stripes, dots or dashes, black maximus 



b. Tubercles large and conspicuous, body with oblong- 



oval, uncolored spots .flavus 



B. Slug small. 



a. Body of various shades of amber, or blackish, with- 

 out spots or color markings campestris 



75. Limax maximus Linne, pi. xxviii, figs. 3, 8. 

 Limax maximus LINNE, Syst. Nat., 1758. 



Limax antiquorum FERUSSAC, Podr. 20; Hist., p. 68, pi. iv, pi. viii, A, 

 fig. 1, 1819. , 



( Vulgaris Moq., cellarius D'Argentville, maculatus Picard.) 



Shell: Elongately quadrate, thin, silvery white in color, 

 convex lines of growth rather coarse. Length, 13.00 mill.; 

 width, 7.00 mill. (9316.) The shell is only a rudiment and pro- 

 tects the lungs (Fig. 3). 



Animal: With an elongated body, with a strong dorsal 

 carina terminating the posterior end and covered with longi- 

 tudinal, elongated tubercles of large size; color ashy or light 

 brown, with several uninterrupted black stripes extending from 

 the mantle to the posterior end, and with numerous alternate 

 rows of round spots, which are placed longitudinally; the sides 

 are much lighter in color and the foot and under parts are 

 dirty white; mantle large, oval, with the tubercles arranged 

 concentrically, color light brown with irregular blotches of 

 black scattered over the surface; respiratory orifice very large, 



*\V . G. Binney, Man. Amer. Land Shells, p. 236, 



