LOCALLY INTRODUCED SPECIES. 451 



projection. There is a strong line of reinforcement running parallel to 

 the upper margin, and a decided vertical median carina. 



The lingual membrane (Terr. Moll., V, Plate I, Fig. F) has about 76- 

 1-76 teeth. The centrals have a large, subquadrate base of attachment. 

 The reflection is large, subquadrate, and bears a single stout median 

 cusp, vrliich has a short cutting point, often longer than in the teeth fig- 

 ured; the side cusps are subobsolete and bear no cutting points. The 

 lateral teeth, about 18 in number, are like the centrals, but asymmet- 

 rical. The marginal teeth are aculeate. Only a few are simple, as in 

 Fig. b; the balance are bifid, as in Fig. c. The bifurcation of the mar- 

 ginals in my specimens commences much nearer the median line than 

 in the specimens examined by Lehmann and Heyuemann. 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 comi^act mass. 



Genitalia (Terr. Moll., V, Plate XII, Fig. A) with a strongly lobu- 



lated 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 flaviis Linn. 



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 _ fig. 4og^ 



sallow white. Body when 

 extended cylindrical, elon- 

 gated, terminating acutely 

 with a short but prominent \s?sra!«^*--''-*T^-i^^5s* 

 keel ; upper part covered 

 with long and narrow, proini- Limax flams 



neut tubercles. Mantle ample, oval, rounded at both ends, with 

 numerous very fine, concentrical strife. Sides paler and without spots. 

 Respiratory foramen large, placed near the posterior lateral margin of 

 the mantle and cleft to the edge. Generative orifice indicated by a 

 white spot a little behind the eye-peduncle of the right side. Length, 

 when fully extended, usually about 75™™; an individual kept in con- 

 finement, with abundance of food, attained the length of nearly 125™™, 

 and several others that of 200™™. 



