142 BULLETIN OF THE 



always shady, damp, and covered with mosses and ferns. I collected the shells 

 on the ledges of the rocks among the dead leaves, at an elevation above the 

 river of about 100 feet. I have not found eitlier of the species in any other 

 locality." 



Mr. J. H. Thomson, to whom I su omitted specimens, sent to me examples 

 of the .same species collected by him, "on a high rocky ledge, covered with old 

 trees, at Tiverton, Rhode Island." 



This species, Z. JVheatleyi, is more nearly allied to Z. viridulus, Menke, than 

 to any other North American ibrm, but differs from it, especially in the form 

 of aperture, in the descending last whorl, and in having a wider umbilicus. 



I dedicate the species to the memory of my late valued and lamented friend, 

 Charles M. Wheatley. (Bland.) 



Fac-similes of the original figures are given on PI. I. Fig. G. 



Zonites Binneyanus, Morse, (p. 121.) 

 Vermont. 



Zonites conspectus, Bland, (p. 122.) 

 Alaska: Salem, Oregon: Merced Co., California (H. Hemphill.) 



Zonites chersinellus, Dall. (p. 123.) 



Dr. Dall gives the number of whorls 4h-5. A copy of his 

 original figure is here given, as mine is said by him to be 

 incorrect. 



Zonites capsella, Gould, (p. 123.) 



Lexington, West Virginia ; Knoxville, Tennessee (Mrs. 

 George Andrews). 



The true capsella has 15-1-15 teeth on the lingual membrane, two on each 

 side of the median tooth being true laterals ; the fourth is a marginal. 



Zonites placentula, Shuttl. (p. 124.) 



Plate II. Fig, A. 



The description in Vol. V. is a translation of that of Shuttleworth. Fig. 

 44 in Vol. V. represents Zonites Laid (see below). The true placentula is 

 here figured. 



Zonites La^wi. 



Plate II. Fig. E. 



I propose to indicate under tlie name of Z. Laid the form here figured and 

 formerly considered by me as Z. placentula. When the limits of the species in 



