Notes on Lingual Dentition of Mollusca. 281 



14. Helix tliyroides, Say. Not common. 



15. Bulimus lubi'icus, Drap. Very rare; but one specimen 

 found. 



16. Pupa muscorum, Linn, (badia, C. B. Adams). Not un- 

 common. 



17. Succinea obliqua, Say. Quite common. 



Family Phil.omycid.jE. 



J 



18. Tebennophorus Carolinensis, Bosc. Very common in 

 woods. 



Family Corbiculad.e. 



19. Pisidium abditum, Hald. Common everywhere. 



I call attention to the fact that though I examined a great 

 number of localities, I was not able to find one of our most com- 

 mon species of Helix, II pulchella, Miiller. I have no doubt, 

 however, that in time it will be discovered in New Hampshire, 

 as it is put down by Bland and Binney as ranging from Canada 

 East to Nebraska. 



NYIII. — Notes on Ungual Dentition of Mollusca. 

 By W. GL Binney and Thomas Bland. 



No. I. 



Read November 15th T 1869. 



The illustrations given in this paper are from figures obtained 

 by the use of photographic negatives in a magic lantern, and 

 reduced by photography. The negatives were taken by our 

 friend Mr. Sam. Powel, of Newport, R. I., to whom we are in- 

 debted for valuable aid in the study of lingual dentition. 



Succinea iYuttalliana, Lea. 

 The specimen from which was taken the lingual membrane 

 here figured was labelled by Mr. Lea. It was received from the 

 Smithsonian Institution. No locality is given for the specimen, 



FEBRUARY, 1870. 19 Ass. LYO. -Vat. HIST., Vol. IX. 



