[22] 

 12. Succinea Groenlandica, Beck. 



Plate 2, figure 13, 



Elongated, strongly wrinkled ; spire elevated, suture well 

 impressed ; body very large proportionally, not inflated ; aper- 

 ture oval, three-fifths the total length. Covered with an 

 opaque, somewhat shining, horn-colored epidermis, with narrow 

 white lines caused by its abrasion from the elevated striae. 



Length. 8, diam. 5 J mill. 



Greenland, and Mingan Island, Gulf of St. Lawrence. 



13. Succinea Gabbii, Tryon. (Nov. sp.) 



Plate 2, figure 14. 



Elongate ovate, thin, sub-pellucid, coarsely undulately stri- 

 ate; spire long, acute, suture deeply impressed ; whorls nearly 

 4, but slightly oblique, very convex, the last three-fourths of 

 the total lengtli ; aperture small, roundly oval, columella well 

 incurved. Light yellowish. 



Length 9, diam. 5 mill. 



Crooked Creek of Owvhee, 60 miles W. of boundary S. E. 

 Oregon. Crane Lake Valley, N. E. Cal.— W. M. Gabb. 



Larger and more convex than Grcenlandica^ and differently 

 colored. The spire is proportionally longer in this than in 

 the other species of the group. 



14. Succinea Verrilli, Bland. 



Plate 2, figure 15. 



Ovate-conic, thin, sub-pellucid, striate; spire elevated, obtuse, 

 apex globose suture well impressed; whorls 3, very convex, 

 not very oblique ; aperture roundly oval, small, columella ar- 

 cuate with a slight callus. Orange yellow, apex reddish. 



Length 7, diam. 3-5 mill. 



Salt Lake, Anticosti Island, Gulf of St. Lawrence. 



Smaller than Groenlandica, of different color, and has more 

 distinct and resiular incremental striae. 



