150 BULLETIN OF THE 



Shell conic, thin, transparent, shining, amber-colored, umbilicated ; 

 whorls 1^, convex, very finely striated ; striae visible only under microscope. 

 Suture distinct, aperture orbicular ; peristome simple, acute, its outer termina- 

 tion perpendicular to the body whorl, the columellar termination reflected over 

 the umbilicus. No internal teeth or process. Greater diameter, 1.35 mm. ; 

 lesser diameter, 1.20 mm. ; length of axis, 1 mm. Locality, Winnebago Co., 

 Illinois. 



The animal not having been examined, I am unable to decide the generic 

 character of the species with certainty ; but judging from the shell I believe 

 that it is a Zonites, and may be placed in the section Conulus of W. G. Bin- 

 ney's arrangement (Terr. Moll., Vol. V.). The shell resembles A. harpa in 

 outline, but differs in other respects very materially. It is smaller ; the texture 

 of the shell is like that of Conulus fulvus. The striae are visible only under 

 the microscope. It is distinctly umbilicated, and the aperture is not oblique. 

 It is no Vertigo. This shell, which is unlike any known Helix, was first dis- 

 covered by Mr. Jesse B. Upson, in a damp meadow farm in Rockford, Illinois, 

 beneath some refuse boards. 



I have examined a large number of specimens under the microscope, and 

 have made comparisons with many other species, both American and foreign, 

 but have found none like it. There is no probability of its being an inij^or- 

 tation. The locality and surroundings forbid that. 



I may mention that Messrs. Binney and Bland have examined the shell 

 and agree that it is new. Such being the case, it is a matter of congratulation 

 (though a surprise) to be able to add a new species to the American Helices 

 from Illinois. I have the pleasure of naming the shell after the first discoverer, 

 Mr. Upson. (Calkins.) 



Mr. Upson suggests to me that the shell is the young of V. ovata, as it was 

 found in company with mature specimens of that species. 



Veronicella olivacea, Stearns, (p. 243.) 



" Lobitos is a small creek entering the sea about forty miles south of San 

 Francisco Bay. The ranch and hamlet through which it passes bear the 

 same name." (Stearns.) 



Specimens of the original lot found in Nicaragua have kindly been fur- 

 nished me by Dr. F. W. Putnam. The jaw has over 20 ribs. The lingual 

 membrane is as usual in the cenus. 



HEMPHILLIA. (p. 240.) 



Plate III. Fig. H. 



Animal limaciform, blunt before, swollen at centre, and greatly attenuated 

 behind : tentacles simple : mantle suhcentral, Lirgt', oval, concealing all Imt 

 a small portion of an internal shell-plate : longitudinal furrows above the 



