102 Dentition of Pulmonale Mollusks. 



point of the first four laterals, and one smaller, outer cusp, bearing one 

 small, sharp, bifid cutting point, representing the outer side cutting point 

 of the first four laterals. The sixth tooth has the largest cutting point 

 bifid. The balance of the teeth are true marginals. They are very low, 

 wide, with two low, wide cusps, bearing each several irregular, blunt, cut- 

 ting points. 



The dentition of this species is, as would be anticipated, of the same 

 type as the allied CceciUanella aciculci, as figured by Lehmann (Lebenden 

 Schnecken Stettins, p. 128, PI. XIII, fig. 43,) and Sordelli, 1. c, fig. 26). 

 The jaw, however, has no appearance of the ''brace" like ribs described in 

 that species by Sordelli (Atti Soc. Ital. Sc. Nat., XIII, 1870. 49, PL I, fig. 

 25). The ribs are quite like those figured of Helix Lansingi (Terr, Moll., V), 

 although they are narrower. 



Uthotii. 



Lithotis rupicola, Blandf. Bombay. 



Referred by Pfeiffer to Succinea, but widely differing from 

 that genus in not having an elasmognathous jaw. 



Jaw (PL XVI, fig. C) arcuate, with a depression or excavation in the 

 centre of its upper margin; scarcely attenuated towards the ends; cutting 

 edge with a decided median projection; anterior surface with vertical striae, 

 but no trace of ribs. 



Lingual membrane (PL VII, fig. G) : centrals with long and narrow base 

 of attachment ; the reflected portion has one long, median cusp, bearing a 

 long cutting point; laterals like the centrals, but asymmetrical; the outer 

 laterals have a bifid side cutting point; marginals a simple modification of 

 outer laterals. 



Limicolaria. 



Limicolaria Numidica, Eve. . 

 Jaw thin, highly arcuate, smooth, ends attenuated. 

 Lingual membrane not examined. 



(b) Jaw with decided stout ribs. 



This section, also, is unsatisfactory, as the species included in 

 it are not all so characterized. 



An ad en us. 



Anadenus ? Himalaya Mountains. An undetermined 



species. 



The jaw is thick, low, wide, slightly arcuate; ends but little attenuated; 

 anterior surface with fourteen stout, unequal, separated ribs, denticulating 

 either margin. 



