OF CONCnOLOGY. 211 



32. Succinea aurea, Lea. 



Plate 2, figure 33. 

 Very small, elongated oval, very thin, transparent; spire 

 short; whorls 3, a little tabulated posteriorly, suture deeply 

 impressed ; aperture narrow-ovate, acutely angled above ; co- 

 lumella slightly folded. Amber color. 



Length 8, diam. 4 mill. 



Ohio, Niagara Falls. 



Same size as S. avara, Say, but narroiuer, more polished and 

 pellucid^ and darker color. 



33. Succinea Haleana, Lea. 



Plate 2, figure 34. 

 Oval, minutely striate; whorls 2|, apex mamillary, suture 

 deeply impressed ; body whorl a little flattened around the 

 superior part ; aperture widely oval, angled above, columella 

 medially folded, with a slight deposit of callus. Light honey 

 yellow. 



Length 5, diam. 3 mill. 



Alexandria, La. 



Very close to avara; the whorls are not so convex, nor the 

 spire so prominent, and the body is proportionally longer. 

 Avara does not extend nearly so far southward. 



Mexican Species, 

 84. Succinea cingulata, Forbes. 



Plate 2, figure 35. 

 Oblong-ovate, slightly oblique, striate, shining; spire well 

 developed, suture impressed ; whorls 4; aperture large, oval 

 columella at the base receding to the left. Brownish-yellow' 

 with obsolete spiral white lines. 



Length 12, diam. 6 mill. 



Mazatlan ? 



