THE NAUTILUS. 87 



undirninished 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 Uuakas, 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. Clap]). 



Though both the adult and young specimens 1 have seen are 

 toothless, G. Clappi seems to be allied to G. lamellidens and multi- 

 deniata, 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 Bid. V. capsella is more widely umbilicated. 



Zonitoides Randolph! n. sj>. 



Shell depressed, with the general form of Pyramidula striatella, 

 thin, somewhat translucent, brownish ; the upper surface somewhat 

 convex, the first H whorls decidedly protruding, glossy, whitish- 

 corneous, contracting at the beginning of the next whorl; surface 

 irregularly but strongly striated, both above and below. Whorls 

 3j, decidedly convex, the last convex below; width of umbilicus 

 somewhat over one-fifth the diameter of shell, showing all the whorls. 

 Aperture oblique, subcircular, somewhat less than one-fourth of the 

 circle excised by the penultimate whorl. 



Alt. 2.7, diam. 4.8 mm. 



Lake Linderman, Alaska. 



The last whorl is less flattened than in Z. limatttli(s,t\ie umbilicus 

 narrower, and there are fewer whorls. 



ANODONTA IMBECILLIS, HERMAPHRODITIC.' 



BY DR. V. STERKI. 



< >n October 2<sth, 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- 



1 See THE NAUTILUS, XII, p. 30 (July). 



