[28] 



Length 12, diam. 6 mill. 



Florida. 



Differs from other shells of same size and proportion in its 

 heavier texture. 



30. Succinea Hawkinsii, Baird. 



Plate 2, figure 31. 



Yery narrow, sub-cylindrical, thin, rugosely striate; spire 

 very short, apex mamillary; whorls 2|, suture not impressed; 

 body very long and narrow, the sides flattened, sub-parallel ; 

 aperture narrow ovate, two-thirds the total length, viewed 

 from the base exhibiting the interior of the whorl to the 

 apex, columella slightly folded above, with a callous deposit. 

 Covered with a rather opaque dark yellow or orange epider 

 mis. 



Leno-th 12, diam. 5 mill. 



Washington Territory, British Columbia. 



No other American species has the peculiar narrow form, 

 fragile substance and opaque epidermis of the above. 



31. Succinea Salleana, Pfeiffer. 



Plate 2, figure 32. 



Depressed ovate, somewhat wedge-shaped, very thin, striate, 

 with impressed irregular revolving strite; spire very short, not 

 elevated above the general outline of the shell, apex papillary; 

 whorls 2i-, very much obliquely flattened above, broadly 

 rounded below; aperture seven-eighths the entire length of 

 the shell, pear-shaped, sharply angled above, columella with- 

 out fold, not so well rounded as the labrum. Light corneous. 



Length 16, diam. 8 mill. 



New Orleans. 



The narrow wedge-shaped form of this species, together with 

 the spire almost minute and the very long aperture, will amply 

 serve to distinojuish it from the others. 



