346 Lingual Dentition and Anatomy of 



Gm^l&jnys. fielinsa, Gupp3^ 



We have received, from Mr. R. J. Lechinere Guppy, spec- 

 imens preserved in glycerine of" his Amphibidima (Omalo- 

 nyx) felina, from Trinidad. On examining the jaw and 

 lingual membrane, we find the species to be a true Omalo- 

 nyx, both organs being the same as have been described for 

 that genus. (See Ann. N. Y. Lye. Nat. Hist., X, 203, O. 

 unguis of Brazil and Guadehnipe.) 



We liave already (I.e., p. 204) stated our belief that 0. 

 felina, judging from the shell alone, is specifically identical 

 with the Guadeloupe O. unguis. 



liitliotis I'lipieolsi, Blanford. 



Sometime since Chmd was indebted to Colonel Jewett for 

 specimens of this interesting species, from one of which he 

 obtained the jaw and lingual membrane. 



PfeifFer (Nov. Conch., IV, pp. 11 and 12, pi. cxii, figs. 

 1-4) describes and figures Succinea rupicola Blanford (sub- 

 genus Lithotis) quoting the name from the catalogue of Dr. 

 Dohrn's collection, remarking that he had no information as 

 to the work in which the subgenus and this, the t^'pical spe- 

 cies,* had been characterized. 



The shell has a certain similarity to that of Succinea but 

 the species does not belong to the Ehismognatha. 



L. rupicola is found on rocks at an elevation of 2,000 feet 

 in the mountains near Bombay. 



The jaw is arcuate, with a depression or excavation at tlie centre of its 

 upper margin ; scarcely attenuated towards the ends ; cutting edge with a 

 decided median projection ; anterior surface with vertical strife, but no 

 trace of ribs. 



The lingual membrane is as usual in the Ilelicince, the marginal teeth 

 being quadrate, not aculeate. The centrals are long and narrow, with 

 lateral expansions at the lower margin ; the reflected portion has one stout 

 median cusp with a point reaching nearl}' to the lower margin of the 



* Succinea {Lithotis) tumida was described and figured by Blanford in Journ. As. 

 Soc. Beniral. 1870. See also Not. Conch.. I.e. 



