232 AMERICAN JOURNAL 



7. Succinea obliqua, Say. 



Plate 2, figure 7. 



Ovate, very thin and fragile, pellucid, shining, irregularly 

 Avrinkled or striate ; spire short, minute, suture well impressed; 

 whorls 3, a little oblique, the last very large, expanded, ovate; 

 aperture large, oval, both lips equally rounded, a little angular 

 behind, equalling nearly three-fourths the total length. Yel- 

 lowish or yellowish green. 



Length 20, diam. 13 mill. 



British America to Virginia, westward to Arkansas, Iowa. 



8. Succinea Greerii, Tryon. (Nov. spec.) 



Plate 2, figure 8. 



Ovate, rather thick, rugose, not transparent; spire short 

 conical, suture moderately impressed ; whorls 3, but slightly 

 oblique, well rounded, the last one a little flattened above the 

 periphery ; aperture ovate, three-fifths the total length, not 

 acute above, well rounded below ; columella twisted, with a 

 slight callous deposit. Light yellowish or greenish horn color. 



Lensrth 15, diam. 9 mill. 



Vicksburg, Miss. — Col. James Greer. 



This species was recently sent to the Academy of Natural 

 Sciences in considerable numbers by Col. James Greer. Most 

 of the specimens were smaller than the one figured. It appears 

 to be intermediate between S. obliqua, Say, and S. Grosvenorii, 

 Lea, differing from the former in color, texture, the contorted 

 and less curved columella, smaller size, and less swollen con- 

 tour, as well as more regular increase of the whorls ; and from 

 the latter by its color, less convexity, more ovate aperture, &c. 



0. Succinea Grosvenorii, Lea. 



Plate 2, figure 9. 



Ovate, thin, translucent, shining, distantly striate ; spire 

 elevated, apex acute, suture well impressed; whorls 3, a little 

 oblique, the body large but not much inflated ; aperture broad- 

 ly rounded, the columella impressed above, equalling two- 

 thirds the total length. Light lemon color. 



Length 12, diam. 8 mill. 



Alexandria, La. 



Smaller than No. 8, with more elevated spire, more convex 

 whorls, and heavier texture. 



