204 On the Relations of Certain 



believe, described, another species of Omalonyx, the shell of 

 which he has communicated to Governor Rawson, with the 

 name Amphibulima {Omalonyx) felina. Indebted to Mr. 

 Rawson for an opportunity of examining the shell, we find, 

 as the author remarks in a letter accompanying the spec- 

 imens, no appreciable distinction between it and the Guad- 

 eloupe 0. unguis. 



In a late letter Mr. Guppy states that "the animal of 

 O. felina resembles in general character 0. unguis, O. par- 

 dalina and A. patula, the latter being much laiger, darker, 

 more strongly colored and more coarsely striated." 



The Guadeloupe specimens recey^ed from Gov. Rawson, 

 collected and labelled by Schramm Saccinea appendiculata, 

 are extremely interesting and not a little perplexing, indeed 

 Schramm, judging from his notes sent with them, rather 

 suggests, that /S. appendiculata, depressa and 0. unguis are 

 all one and the same species. 



Succinea depressa Rang (Guer. Mag., 1834, t. 55) is a 

 species as to which there seems to be much uncertainty. 

 Fischer described it, the animal ajid its dentition, as Pellicula 

 depressa in Act. Soc. Linn. Bord. XX, 5, to which we have 

 not had an opportunity of referring, and also in M6lang. 

 Conch, p. 67, t. vi, f. 19. 



In the latter work, the jaw and teeth are thus charac- 

 terized : — 



"M^choire semblable k celle des Limaces, et portant une 

 quantity de denticulations. Plaque linguale se rapprochant 

 de celles dcs Ambrettes. Epines m6dianes trilides ; lat6- 

 rales bifides." 



"We give copy of the figure of the jaw on plate ix, fig. 4. 



Petit (Jour. Conch., 1856, p. 154) expresses the opinion 

 that S. appendiculata Pfr. is the same species, Rang's specific 

 name having priority, but Pfeifier (Mon., IV, 804) referring* 

 to Rang's figure, maintains that they are distinct. 



The character from which the specific name of Pfeiffer's 

 specie.s is derived, he describes (Mon., II, 531) thus ; "col- 



