162 ZON1TES. 



H. WIIEATLEYI, Bland. PI. 51, figs. 18, 19. 



Umbilicated, depressed, thin, shining, pellucid, brownish horn- 

 color, finely striated; spire subplanulate, suture slightly- iiu- 

 pressed ; whorls little convex, the last rapidly increasing, more 

 convex on the base, scarcely descending at the aperture, umbili- 

 cus rather wide, margins of peristome approximating, joined by 

 a thin callus. Diam. 5 mill. 



East Tennessee, Clingham's Peak, N. G. 



Specimens collected at the latter locality are very much larger 

 than the type, measuring 9 mill. diam. The shell is most nearly 

 allied to H. radiatula. It is more depressed, with wider um- 

 bilicus than H. arborea. 



<j. j. H. PETROPHILA, Bland. PI. 51, figs. 20, 21. 



Broadly umbilicated, depressed, subglobose, thin, shining, 



* ^ <f translucent, pale corneous, irregularly striated, suture moderately 



impressed ; whorls 5J-6, rather convex, the last more convex, 



not descending ; umbilicus widely excavated ; peristome simple, 



somewhat thickened, often rose-colored. Diam. 6 mill. 



Eastern Tennessee, Western North Carolina and Georgia. 

 Allied to H. arborea, but differing somewhat in color, with an 

 additional whorl, more distinctly striate, and with much wider 

 umbilicus. 



H. BINNEYANA, Morse. PL 51, fig. 22. 



Umbilicated, subglobose, transparent, almost colorless, shin- 

 ing, smooth, with microscopic wrinkles of growth and still more 

 delicate oblique wrinkles; whorls about 4, rounded, gradully 

 enlarging, the last globose, broadly umbilicated below; aperture 

 oblique, subcircular, large. Diam. 4 mill. 



Maine, Massachusetts, Vermont, Michigan. 



In 1865 I proposed H. Morsel for this species, Morse's name 

 being preoccupied in Helix by Pfeiffer ; as a Hyalina the original 

 name can stand. 



H. CAPSELLA, Gould. PI. 51, figs. 23-25. 



Umbilicus small, deep, shell planorboid, pellucid, shining, 

 amber-colored or yellowish corneous ; whorls about 6^, narrow, 

 flattened, with distant, impressed radiating striae, suture mar- 

 gined ; aperture narrowly semilunar. Diam. 5 mill. 



Mountains of East Tennessee and West Virginia. 



