350 Lingual Dentition and Anatomy of 



On repeated sul)scquent visits to the same locality I failed to 

 find any more." 



The jaw is low, wide, slightly arcuate, ends pointed; a decided median 

 projection to the cutting edge; anterior surface smooth. There is no ap- 

 pearance of a supplementary plate as in SuQcinea. 



The lingual membrane is as usual in the HdicincB. The central tooth is 

 long and narrow, small in proportion to the laterals, the reflected portion 

 has one long median cusp, the side cusps being subobsolete. The lateral 

 teeth are wide, broad as long, the reflected portion almost as large as the 

 whole base of attachment, and tricuspid, the inner cusp very small, the 

 median cusp large and bluntly truncated, the outer cusp smaller than 

 the median and bluntly pointed. The marginal teeth are subquadrate, 

 wider than high, the apex reflected, obliquely produced and bearing five 

 or more blunt, short denticles, of which the inner two are the largest. 



This description proves that the species is more nearly re- 

 lated to Pupa, Olausilia and Slenogyra than to Succinea 

 among the Helicidoe, but it may well prove to be a Limnsean, 

 as suggested by H. and A. Adams. As such it must be 

 compared to Pompholyx, 



