196 



THE CHICAGO ACADEMY OF SCIENCES. 



situated on the right side near the posterior end of the mantle; 

 locomotive disk narrow; tentacles short, blackish, blunt, placed 

 very near the lower surface; eye-peduncles long, tapering, 

 rather stout, the eyes placed on prominences at the tip, eyes 

 blackish; animal exuding mucus from its entire surface (Fig. 8). 

 Length, 167.00; width, 19.00; height, 13.00 mill. (10091.) Animal fully ex- 

 tended. 



Jaw : Long, arched, narrow, endsattenuated and rounded; 

 cutting edge with a strong median projection, and a central 

 vertical carina or ridge; striated longitudinally and vertically 

 (Fig- 43- J)- 



Radula formula: ^ +Y + y+i+V + V + (75-1-75): 

 central tooth with a subquadrate base of attachment, with the 



FIG. 43. 



Radula of LIMAX MAXIMUS Linne. (Original.) c, central tooth; 1, 

 first lateral; 15, fifteenth lateral tooth; 50, thirty-third marginal tooth; J,jaw. 



lower, outer corners attenuated; reflected portion large, longer 

 than wide, the cutting point about half the length of the reflec- 

 tion, and trifid; lateral teeth 17 in number, similar to central 

 tooth; marginals of the aculeate type, the first forty-five being 

 bifid and the last thirteen of the pure aculeate form (Fig. 43). 

 Genitalia: "With a strongly lobulated ovary; penis sac 

 long, cylindrical, tapering to its apex, where it receives the re- 

 tractor muscle and the vas deferens; genital bladder small, on 

 a short duct." 



