144 TERRESTRIAL AIR-BREATHING MOLLUSKS. 



also been recently noticed in Philadelphia, and in Brooklyn, N Y. It is an 

 introduced species. Its rich brown or black stripes, giving it a leopard-like 



Fig. 57. 



L. maximus. 



appearance, and its great size, at once distinguish it from any species hitherto 

 known to inhabit Eastern North America. 



Jaw long, narrow, arcuate, strongly striated both vertically and trans- 

 versely, ends attenuated ; cutting edge with a prominent median projection. 

 There is a strong line of reinforcement running parallel to the upper margin, 

 and a decided vertical median carina. 



The lingual membrane (PI. I. Fig. F) has about 761 76 teeth. The 

 centrals have a large, subquadrate base of attachment. The reflection is large, 

 subquadrate, and bears a single stout median cusp, which has a short cutting 

 point, often longer than in the teeth figured ; the side cusps are subobsolete, 

 and bear no cutting points. The lateral teeth, about 18 in number, are like 

 the centrals, but asymmetrical. The marginal teeth are aculeate. Only a 

 few are simple, as in Fig. b ; the balance are bifid, as in Fig. c. The bifurca- 

 tion of the marginals in my specimens commences much nearer the median 

 line than in the specimens examined by Lehmann and Heynemann. There 

 are, indeed, but 12 marginals without the bifurcation on one membrane ex- 

 amined. 



Individuals kept in confinement were guilty of cannibalism. 



The eggs are globular, transparent, over two hundred in number, laid in a 

 compact mass. 



Genitalia (PI. XII. Fig. A) with a strongly lobulated ovary; penis sac long, 

 cylindrical, tapering to its apex, where it receives the retractor muscle and the 

 vas deferens; genital bladder small, on a short duct. 



Limax flavus, LINN. 

 Vol. III. PI. LXV. Fig. 1. 



Color brownish, yellowish-brown, or ashy brown, with oblong-oval uncolored 

 spots, which have a longitudinal disposition ; mantle with rounded spots ; head, 

 neck, and eye-peduncles blue, semi-transparent ; tentacles white ; base of foot 



