Dentition of Pulmonale Mollusks. 129 



Jaw with 15 plates (PL XV, fig. N). 



Lingual membrane (PI XII, fig. C) 18 mm. broad, 16 mm. long, The 

 rows of teeth are arranged in a backward curve from the median line for a 

 short distance, and then run obliquely to the outer margin of the membrane; 

 marginals as usual in the genus, but the central tooth differs in having a 

 long, stout, lance-like cutting point, bearing at the middle of each side a 

 prominent, subobsolete, blunt spur ; three laterals on either side like the 

 central, but asymmetrical, with the spur only on their outer sides ; teeth in 

 one row 108-1-108. 



Uguu§. 



For jaw and lingual membrane, see Terr. Moll., V. 



Liguus virgineus. Linn. Aux Oayes, Haiti. R. Swift. 



Lingual membrane (PL XII, fig. A). 



The marginal teeth are as usual in the genus, but centrals and laterals 

 differ; membrane 4£ x 18 mm.; teeth 40-1-40; the centrals and two first 

 laterals have a short, stout, pointed cutting point, of the same type as des- 

 cribed in Orthalieus galllna-sullana^ 



This completes the list of terrestrial Pulmonata* examined by 

 me ; the following have also been described from other orders, 

 generally with a figure. 



PULMONATA LIMNOPHILA 



Melampus bidentatus. Say. Ann. Lye. N. H. of N. Y., IX, 286. 



Alexia myosotis, Dr. L. & Fr. W. Sh. K A, II, 1. 



Carychium exiguum, Say. " " " 6. 



Limnoza appressa, Say. Am. Journ. Conch., VII, 161 ; L. & Fr. W. Sh., II, 28. 



stagnalis, L. L. & Fr. W. Sh., II, 155. 



megasoma,S ay. Am. Journ. Conch., VII, 162. 



columella, Say. L. & Fr. W. Sh. K A., II, 24. 



oatascopium, Say. " " "55. 



Ponpholyx effusa, Lea. Am. Journ. Conch., VI, 312. 



* Excepting Buliminus Natalensis, unfortunately omitted. (See Ann. 

 N. Y. Acad. ScL, I, 362, PL XV, fie:. J. 



