North American Species of Zonites, etc. 357 



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. b.) is globular 

 on a short, narrow duct : the penis-sac (p. s.) is very long, nar- 

 row, cylindrical, receiving the retractor muscle (r.).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 Rugeli. 



Zonites capnodes, W. G. B. 



Living specimens received from near Kuoxville, Tenn., through 

 the kindness of Mrs. G. Andrews, have enabled me to figure 

 (pi. XIV, fig. C) the genitalia. The genital bladder (g. b.) 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 inornatus. 



It is in many individuals more easy to distinguish capnodes 

 from fuliginosus by the genitalia and dentition than by the shell. 



Zonites subpSanus, Binn. 



Roan" Mt., N. 0. 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 pi. XIV, 

 fig. J. 



Zonites Rugeli, n. sp. 



On Eoan 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 (pi. 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. 



