THE NAUTILUS. 43 



NOTES ON THE NORTH AMERICAN SPECIES OF SUCCINEA. 



BY T. D. A. COCKERELL. 



\_Concluded from Vol. F/, ja. 31.] 



(18.) S. luteola Gould. Mr. Singley sent me this from Manatee Co., 

 Florida, and at the same time specimens marked texasiana 

 Pfr., from Derby, Frio Co., Texas. I made notes on these 

 shells as follows : 



(a.) S. texasiana. Belongs perhaps to patris group, but very 

 ^ different from it, and forming a new subsection. Shell 



shaped, but for moutli, like some varieties of Lhnncva 

 palustris. Length 16 2 mill. Transversely irregularly 

 striate-ribbed. Young example semitransparent pale 

 horn, adults ojmque yellowish-white. 



(b.) S. luteola. No doubt the same species as texasiana, but the 

 specimens are horn-color and smaller ; some little ones are 

 more like j^utr is — 7^ mill, long, shiny, striate, horn-color, 

 more globose, spire short. 



Sect. III. Lucence. 



=Lucena Oken. 



(19.) S. avara Say. This species varies in color a good deal, and 

 also in shape. The following are the varieties described or 

 known to me. 



(a.) forma alba nov. Shell greenish-white. Horseshoe Bend 

 Gulch, Custer Co., Colorado, at about 10,000 ft. alt. Mr- 

 H. Prime has an albino of S. avara from Arizona, and 

 there is a specimen in the Binney and Bland collection 

 from New York State (Dr. Lewis.) 



(b.) forma wardiana Lea. Shell yellow. 



(c.) var. vermeta Say. Yellowish, thin, suture deep. I have 

 seen a clear red-brown form of this from Toronto, Can- 

 ada (D. B. Cockerell). An amber-colored form was sent 

 to me by Mr. Binney, collected by Mr. W. S. Teator at 

 Barrytown, Duchess Co., N. Y. — this may also fall 

 under vermeta. « 



