Eastern province — interior region species. 



221 



Fig. 234. 



Zoiiites capsclla, Gould. 

 Shell quite small, plauorboid, pellucid, glistening, amber-colored; 

 spire nearly plane, comiiosed of about 6^ closely revolv- 

 ing, flattened whorls; surface with distant, impressed, ra- 

 diating strite; suture margined; aperture narrow, semi- 

 lunar; peristome simple, not thickened by callus within; 

 base i^erforated by a deep, rather small, funnel-shai^ed 

 umbilicus. Greater diameter, 5'""" ; height, 2^"". 



Helix rotula, Gould, Proc. Bost. Soc, iii, G8(June, 1848). — Pfeiffkr, 



Mod. Hel. Viv., iii, 107, preocc* Z.capt,ella- 



Helix capseUa, Gould, iu Terr. Moll., ii, 239, pi. xxix, a, fig. 2. — W. G. Binnky, Ten- 

 Moll., iv, 117.— Lewis, Amer. Journ. Couch., vi, 188, pi. xii, 12 (1871). 



Zonites capsdla, W. G. Binney, Terr. Moll., v, 123. 



Hyalina capsella, Tkyon, Amer. Jouru. Couch., ii, 252 (1866). — W.G. Blnney, L. & Fr. — 

 V^. Sh., i, 40, fig. 72 (1869). 



Mountains of Eastern Tennessee and West Virginia; a species of 

 the Cumberland Subregion. 



Formerly 1 referred as a synonym to this species Z. place7itula {q. v.), 

 describing and figuring the animal and dentition. 1 am, however, now 

 convinced of its difference. 



Lingual membrane with 15-1-15 teeth, two laterals on either side. 



Zonites L.awi. 



This is the shell figured by me iu Terr. Moll., V, Fig. 44, as Z.placen- 

 tula, as I confounded it with that species. Having re- 

 cently received the true placentula (see below), I find this 

 distinct. I suggest for it the name of Miss Law, who has 

 added so much to our knowledge of our land-mollusks by 

 her exi^lorations in Tennessee.t 



Until the limits of the species in this puzzling group are 

 better known, it will be difficult to properly describe thi.s 

 species. The figure shows it to be larger, more deeply 

 and widely umbilicated, and with a more elevated spire 

 than Z. placentula. 



Mountainous region of Tennessee ; a species of the Cumberland Sub- 

 region. 



It is also figured in Ann. of N. Y. Acad. Sc, I, Plate XV, Fig. E. 



*Tho rules of nomenclature as now adopted do not require the abandonment of the 

 name capsella after its long prevalence, though rotula is not pre-occupied in Zonites. 



t As an instance of Miss Law's devotion to science, I can mention her taking a jour- 

 ney of several weeks, by wagon, over mountainous roads, to the locality where Vit- 

 rinizoiiites was oiiginally iound, in search of the liviug auimal, which she kiudly 

 sent to me, and thus fixed the generic character of the species. 



Fig. 235. 



Z. Lawi. 



