THE NAUTILUS. 87 
undiminished strength over the base; last whorl broadly rounded 
at the periphery. Aperture very narrowly lunate, the convex out- 
line of the crescent somewhat angular in the middle; peristome 
thin and simple. Alt. 3, diam. 5.7 mm. 
Mirey Ridge, Great Smoky mountains, Tennessee, near the North 
Carolina boundary. 
This is one of the fruits of Messrs. Ferriss and Clapp’s summer 
journey to the Great Smokies and Unakas, the story of which will 
be given to our readers by Mr. Ferriss, who suggested to me the 
propriety of naming the species in honor of Mr. George H. Clapp. 
Though both the adult and young specimens I have seen are 
toothless, G. Olappi seems to be allied to G. lamellidens and multi- 
dentata, but with a decidedly smaller umbilical perforation, the 
same number of whorls with twice the diameter, and a decidedly 
different ornamentation, the radiating grooves reminding one of 
Vitrea sculptilis Bld. V. capsella is more widely umbilicated. 
Zonitoides Randolphi n. sp. 
Shell depressed, with the general form of Pyramidula striatella, 
thin, somewhat translucent, brownish; the upper surface somewhat 
convex, the first 1} whorls decidedly protruding, glossy, whitish- 
corneous, contracting at the beginning of the next whorl; surface 
irregularly but strongly striated, both above and below. Whorls 
33, decidedly convex, the last convex below; width of umbilicus 
somewhat over one-fifth the diameter of shell, showing ail the whorls. 
Aperture oblique, subcircular, somewhat less than one-fourth of the 
cirele excised by the penultimate whorl. 
Alt. 2.7, diam. 4.8 mm. 
Lake Linderman, Alaska. 
The last whorl is less flattened than in Z. limatiulus, the umbilicus 
narrower, and there are fewer whorls. 
ANODONTA IMBECILLIS, HERMAPHRODITIC.: 
BY DR. VY. STERKI. 
On October 28th, last, I chanced to secure a good number of 
Anodonta imbecillis, Say, for a more careful examination about 
hermaphroditism. Of forty specimens opened, all, without an ex- 
'See Tue Nauvitus, XL1, p. 30 (July). 
