68 Remarks on North American Helicidce. 



and many, without mention of habitat, from several correspon- 

 dents. 



Observations. — Tliis species, the aperture of wliicli is repre- 

 sented in Fig. V^., is common in American cabinets, and usually 

 Fig. V. labelled H. avara, or var. of II. auriculata, but it 

 appears to me entirely distinct. It is most nearly 

 allied to the former, but is larger, not hirsute, and 

 E.auriformis lias the groovc in the last whorl, within the 

 umbilical region like the latter. The parietal 

 fold is somewhat similar to, but does not descend so far into the 

 aperture as that of H. Postellania, but the teeth on the labrum 

 are in form and position, though more developed, rather like 

 those of II. avara. They are separated by the same deep sinus, 

 but the upper one generally without the sharp reflexed hook at 

 its termination. 



The pale and white varieties are, I believe, from Alabama, 

 — my figure is taken from one of them, the shells are 

 heavier, and the parietal fold especially is more developed. 



I have given to this species the name auriformis^ the general 

 form of the aperture, with its several parts, offering a more 

 striking resemblance to the human ear than is the case with 

 any of its allies. 



