352 Remarks on Certain Species of 



The fulcrum in II. pustuZoides is of the same nature as that 

 in H. lepori?ia, but less developed, and with the outer edge 

 entire. 



The accompanying figures show the base of H. pustuloides 

 (fig. 2) and II. ypustula (fig. 1). 



2 



Dr. Binney's figure imperfectly represents the former, and as 

 regards the size of the umbilicus is inconsistent with his 

 description. 



Helix glaphyra Say. 



Say's description was published in Nicholson's Encyclopaedia 

 (Amer. Ed. 1816), and is as follows ; — 



"11. Glaphyra. 



" Shell very much depressed, thin, fragile, pellucid, polished ; whorls 

 five, regularly rounded, and with obsolete and irregular wrinkles across 

 them ; beneath whitish ; umbilicus moderate, not exhibiting the volu- 

 tions. PL 1, fig. 3. 



" Taken by Mr. G. Ord in his garden in Philadelphia. 



" It considerably resembles Helix nitens of Europe, particularly in 

 being whitish beneath, and will be properly arranged next that species 

 in the systems." 



Say's figure, of which the annexed is a fac-simile, is unintel- 

 ligible, — it shows 3£ to 4 whorls only. He gives no 

 measurement in his description, — the largest diame- 

 ter of the figure is 9 mill. 



Through the kindness of Mr. ~W. G. Binney I am enabled to 

 publish the following extracts from a letter addressed in Sep- 



