Notes on Lingual Dentition of Mollusca. 



285 



An extremely instructive lingual, showing the merging of 

 laterals into uncini more completely than in any we have previ- 

 ously examined. 



Yei'onicelln Floridana, Binney. 



(Terr. Moll. U. S., II., p. 17.) On p. 306 of Land and Fresh- 

 water Shells of North America, Part I., we figured the lingual 



Fie. 5. 





Lingual dentition of Veronioella Floridana, Bin. 



dentition of this species, as drawn by Mr. Morse. We now give 

 a figure drawn by Dr. Leidy for the " Terrestrial Mollusks of the 

 United States," but not included in that work. The details of 

 the separate teeth are mueh more accurately shown in the new 

 figure. It will be noticed that Dr. Leidy gives 5S.1.5S teeth, 

 Mr. Morse 41.1.41, and our text (p. 304) 48.1.48. 



Limax flavus, Linn. 

 A figure of the lingual dentition of this species, drawn b} r Dr. 

 Leidy, is also given, for comparison with that of Mr. Morse, on 



Fig. 6. 



Lingual dentition at Limax flams, t,. 



p. 63 of Land and Fresh-water Shells, Part I. Here also the num- 

 ber of teeth varies, as in VeroniceUa Floridana, described above. 



