Two Netv Species of Zonites. 3(59 



This species. Z. Wheatleyi, is move iieurly iillied to Z. ciridu- 

 lus, Mke, than to any other Xorth American form, but differs 

 from it, especially in the form of a])erture, in the descending- 

 last whorl, and in having a wider umbilicus. 



I dedicate the species to the memory of my late valued and 

 lamented friend, Chas. M. Wheatley. 



Z4>iiit.e§ pelrophilus, nov. s\). 



T. late umbilicata, depresso-subglobosa, tenuis, nitens, transliicens, albida, 

 irregulariter striata ; sutura mediocris ; anfr. 5J — 6, convexiusculis, ulti- 

 mus convexior, non descendens ; umbilicus extus late excavatus, perspecti- 

 vus ; apertura rotundato-lunaris ; peristoma simplex, paululo subincrassa- 

 tum, saepe roseum, margine columellari reflexiusculo. 



Fig. II. 



Shell broadly umbilicate, depressed; subglobose, thin, 

 shining, translucent, whitish, irregularly striated ; su- 

 ture moderately impressed ; whorls 5.} — 6, rather convex, 

 the last more convex, not descending; umbilicus widely 

 excavated externally, pervious ; aperture roundly lu- 

 nate ; peristome simple, somewhat thickened, often 

 rose-colored, the columellar margin slightly reflected. 



Diam., major 6, min. 5, — 5^ ; Alt. fei'e 3 mill. 

 Z. pbtropMliM. 



Habitat. — The Cliffs, Knoxville, Tennessee, found with Z. 

 Wlieatleyi, Mrs. Geo. Andrews. 



Remarlc}^. — This sjiecies is, in general form, nearly allied to 

 Z. arbor eus, but the color is different, the strife are more de- 

 veloped, and the itmbilicus is much wider. 



My friend, Mi-. W. Gr. Binney, examined the dentition of 

 Z. j^etrojMlus, and favored me with notes on the subject. He 

 found the teeth 15 — 1 — 15, with two jDcrfect laterals, one only 

 on each side. Z. viridulus has the same number of laterals, 

 but many more marginals. 



I would express my deep obligation to Mrs. x\ndrews for her 

 uniform kindness and liberality in supplying me, during many, 

 yeai's, with numerous rare and interesting si:)ecies. 



