38 liemarlcs on Certain Species of 



In the early part of the present year I received, through the 

 kindness of Dr. Wilson of Darien, Ga., several specimens which 

 I found to be the H.jpustula Binney. This led me more carefully 

 to examine a number of hirsute shells, collected by Bishop 

 Elliott, Mr. Postell, and Mr. Dorman, which were labelled in 

 the cabinets both of Mr. W. G. Binney and myself, H. leporina 

 Goukl. I am now satisfied that they are H.jmstiila Fer., dis- 

 tinct from II. lej^orina, and that Dr. Wilson's Darien shell, the 

 H. pustula Binney, is an undescribed species. 



The groove within the umbilicus, is a very marked feature 

 in Ferussac's species (see fig. 1, p. 42), and though not referred 

 to in the description is distinctly shown in one of his figures ; it 

 is entirely wanting in II. leporina, and also in the Darien shell 

 (fig. 2, p. 42). This groove is not only an external character, 

 but its presence modifies the internal structure of the shell. On 

 opening the base of the last whorl immediately behind the 

 aperture, a strongly developed transverse tubercle is seen 

 within, from which a strong ridge-like lamella runs round the 

 umbilical opening, corresponding in extent with the groove. 

 This tubercle, and the extension of it, are entirely disconnected 

 by a sinus or channel from the floor of the penult whorl. 



The hirsute character of this species is not alluded to by any 

 author. The outer edge of the peristome in specimens from St. 

 Augustine, is of a deep rose color. 



In his " Notes on American Land Shells," Proc. Acad. Phil. 

 1857, Mr. W. G. Binney gives St. Simon's Island and Savannah, 

 Ga., as habitats of II. leporina. He refers to the shells above 

 alluded to as to which we both were in error, and which we 

 have since determined to be II. pustula Fer. 



The measurements of a specimen of average size, are as fol- 

 lows: 



Diam. maj. 5, min. 4, alt. 2i, mill. 



For specimens of H. pustula from the neighborhood of 

 Savannah, I am indebted to Bishop Elliott, from St. Simon's 



