[19 ] 



4. Succinea campestris, Say. 



Plate 2, figure 4. 



Eounded-ovate, distantly striate, shining; spire short, apex 

 acute ; whorls 3, convex, suture impressed ; body large, ventri- 

 cose ; aperture oval, not quite two-thirds the total length, co- 

 lumella indented in the middle. Yellowish white or yellowish 

 horn color, the strite opaque white. 



Length 15, diam. 10 mill. 



South Carolina to Florida. 



Differs from inflata in having a somewhat longer, more con- 

 vex spire, and in the distant, white striae. In campestris the 

 aperture does not occupy "'so large a portion of the entire width 

 as in inflata. > 



5. Succinea Stretchiana, Bland. 



Plate 3, figure 5. 



Globose-conic, thin, pellucid, shining, striatulate ; spire short, 

 obtuse, suture well impressed ; whorls 3, convex, the last in-- 

 flated ; aperture roundly oval, columella arcuate, slightly thick- 

 ened. Greenish horn color. 



Length 6'25, diam. 5 mill. 



Little Yalley, Washoe Co., Nevada, on the eastern slope of 

 the Sierra Nevada, 6500 feet above the sea. 



6. Succinea effusa, Shuttleworth. 



Plate 3, figure 6. 



Depressed- oval, very thin, transparent, shining, slightly 

 striated; spire remarkably short, apex acute, body equalling 

 foufteen-fifteeuths of the length of the shell ; aperture very 

 large, oblique, wide, broadly rounded below, columella scarcely- 

 rounded. Greyish horn color. 



Length 11, diam. 7 mill. 



Florida. 



Differs from all the preceding in the minute spire and pro- 

 portionally very long body, the aperture being four-fifths the 

 total length and two-thirds of the width of the shell. 



** Spire moderate, apex acute, lody inflated, aperture 

 large, broadly oval, peristome well rounded, the superior 

 part not fl.attened. 



