Dentition of Puhnonata. 21 



The specimens agree perfectly with the description and fig- 

 ures in the "Terrestrial Mollusks of the United States.'* 

 The genital system is also the same as figured by Leidy in 

 the same work, and by Moquin-Tandon (Moll. Terr, et Fluv. 

 cle France). There can be no doubt, therefore, of the iden- 

 tity of the species. 



The figure of the deutition of this species given by me in 

 L. and F. W. Shells N. A., I, p. 63, f. 105, is drawn from 

 some other species. 



The true L. flavus now examined by me has central teeth with subobso- 

 lete side cusps, bearing no cutting points, central cusp short, with a 

 short, bluutly pointed cutting point. Laterals like the centrals, but un- 

 symmetrical. Marginals aculeate, the extreme ones bifurcated. Teeth 

 in the lingual examined over 00-1 -GO. 



The figure by Dr. Leidy published by Mr. Bland and 

 myself (Ann. Lye. Nat. Hist, of N. Y., IX, 285) though 

 unsatisfactory, was, no doubt, drawn from this species. 



The lingual membrane examined by me agrees with the 

 figures given by Heynemann* of the dentition of L. flavus. 



Limax agrestis, Linn. 



Specimens from Burlington, N. J., of this species, of un- 

 doubted identity, agreeing externally and anatomically with 

 the figures in the "Terrestrial Mollusks of the United States," 

 furnished the lingual membrane here described. 



Teeth 50-1-50, with 14 perfect laterals. Centrals long, narrow, with a 

 middle long cusp, extending to the lower edge of base of attachment, and 

 bearing a long, acute cutting point, extending far below the lower 

 edge; side cusps subobsolete, but bearing well-developed, triangular 

 cutting points. Laterals like centrals, but unsymruetrieal by the changed 

 form of the inner cutting point. Marginal teeth aculeate, the extreme 

 ones do not appear to be bifurcate. 



Jaw wide, low, slightly arcuate, with broad median projection. 



* See Mai. Blatt, X. 



