OF CONCHOLOGY. 



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2. Pupilla Hoppii, Moller. 



Plate 15, figure 3. 

 Obtusely fusiform, whorls 5, very much rounded, with deep 

 suture ; aperture small, quadrately oval, with a small tooth on 

 the parietal wall, and a tubercular thickening on the columellar 

 portion of the lip ; surface coarsely striate. 



Greenland. 



I have never seen this species, and the above description is 

 made up from the only published figure of it. Holler's descrip- 

 tion is very short and meagre. 



3. Pupilla Blandi, Morse. 



Plate 15, figure 4. 



Ovately cylindrical, apex obtuse ; whorls 6, well rounded, 

 with deep suture ; aperture rounded, small, the lip subreflected, 

 with a tooth on the parietal wall, one on the columellar portion, 

 and a third remote within the base. 



Length 3, diam. 1-5 mill. 



Drift on Missouri River, near Fort Berthold. 



4. Pupilla variolosa, Gould. 



Plate 15, figure 5. 



Ovately conical, apex obtuse, whorls 5, "well rounded, with a 

 profound suture ; surface thickly and irregularly pitted with 

 small round indentations, aperture small, obliquely oval, with 

 lip slightly reflected, with a revolving lamellar tooth, a tooth on 

 the columella and another on the base. Yellowish green. 



Length 2 mill. 



East Florida. 



5. Pupilla pentodon, Say. 



Plate 15, figure 6. 



Ovately conical, with subacute apex, whorls 5, well rounded 

 with deep suture ; aperture small, obliquely rounded, lip ex 

 pandcd, but not reflexed, with a white callous inner margin 



