V 
i 
North American Species of Zonites, etc. 307 
to that of Z. laevigatus than any other American species. Like 
that, there are no perfect lateral teeth, but only decided transition 
teeth. 
The genitalia are figured on plate XIV, fig. B. The ovary is 
very large (ov) and stout: the genital bladder (g. 0.) is globular 
on a short, narrow duct: the penis-sac (p. s.) is very long, nar- 
row, cylindrical, receiving the retractor muscle (7.) near its basal 
termination, and merging at its apex into the vas deferens (v. d.) 
The penis-sac has not the accessory process found in Zonites 
—capnodes, friabilis, laevigatus, inornatus, fuliginosus, and Rugelt. 
Zonites capnodes, W. G. B. 
Living specimens received from near Knoxville, Tenn., through 
the kindness of Mrs. G. Andrews, have enabled me to figure 
(pl. XIV, fig. C) the genitalia. The genital bladder (g. 0.) is 
large, globular, on a short, narrow duct: the penis-sac (p. s.) has 
the same peculiar accessory process which I have (Terr. Moll., V) 
figured in those of Z. laevigatus, friabilis and tnornatus. 
It is in many individuals more easy to distinguish capnodes 
from fwliginosus by the genitaha and dentition than by the shell. 
“Zonites subplanus, Binn. 
Roan Mt., N. C. Mrs. G. Andrews. 
I have already stated that the dentition of this species resem- 
bles that of Z inornatus. I here give a figure of it on pl. XIV, 
at ee EEE 
fig. J. 
“Zonites Rugeli, nu. sp. 
On Roan Mountain, Mitchell Co., N. C., Mrs. G. Andrews found 
numerous specimens of a Zonites, for which, proving new to sci- 
ence, I propose the name of its discoverer. 
Shell (pl. XV, fig. H) depressed globose, perforated, thin, delicately wrin_ 
kled, the apicial whorls sometimes striate, greenish horn-colored, dark 
smoky above ; spire slightly elevated, apex flat ; whorls 6, slightly rounded, 
the last globose, scarcely excavated at the perforation ; aperture large, 
rounded, oblique ; peristome simple, thin ; ends slightly approaching ; the 
columellar one scarcely broadened. Diam., larger 19; lesser 15 ; height 
9 mill. 
