326 Cincinnati Society of Natural History. 
8. Mesodon wheatleyt, Bland.—Typical examples of this rare species 
were found on the southeastern slope of Roan, associated with 1. an- 
drewst, var. major, and with a few other species. It presents no feat- 
ures of special interest, save its comparative rarity. 
9. Mesodon profunda, Say.—I found two specimens of this species, 
the smallest I have ever seen. They are thin, light, semi-transparent, 
and ornamented with numerous fine, dark reddish brown lines. Other 
members of the party found occasional specimens, but the species is 
evidently rare in this locality. 
10. Macrocy disconcava, Say.—This species is tolerably abundant 
here, and is undistinguishable from forms of M. vancouverensis, Lea, 
from California. The variety is slightly different from the typical 
form further north. I have a variety of this species taken at Pine 
Mountain, Kentucky, which is nearly equal in size to the largest 
specimens of M. vancouverensis. 
11. Zonites capnodes, W. G. Binney.—Typical specimens occurred 
on the west slope of Roan, and the east slope of Iron Mountain. 
12. Zonites fuliginosus, Griffith.—Several specimens occurred which 
I have referred to this species. Mr. Bland says, in one of his notes, 
-‘shape of aperture different,’ and in another place suggests a careful 
dissection of the animal. Hzxternally the characters are so like those 
of the typical shells that I do not detect any difference. 
13. Z. levigatus, Pfr.—This shell is here represented by a globose 
variety, either the same or similar to that published by Mr. Binney, 
Terr. Moll., vol. v., p. 108, fig. 23. This variety is much thinner and 
lighter in texture than the typical form. A species which I years ago 
separated as distinct, under the name of Z. perfragilis, was referred, 
as I think no doubt erroneously, to this form. The shell is quite dis- 
tinct from that of levigatus. 
The varieties of this shell, ranging from Ohio to Texas, and occurr- 
ing in the mountains as well as the lowlands, would form an interesting 
group for study. : 
14. Z. demissus, Binney.—Typical specimens. 
15. Z. ligerus, Say.—This species is represented at this locality by 
a very large, very much €levated variety, having a remote likeness to 
the Z. acerrus, Lewis, but which is certainly the Z. ligerus. 
From the typical acerrus it differs in the greater elevation of the 
spire, less polished surface, more distinct lines of growth, and as a re- 
sult in the general facies. The shells can hardly be mistaken for each 
other by one acquainted with the species, The four forms, ligerus, 
