1906.] NATURAL SCIENCES OF PHILADELPHIA. 159 



Succinea concordialis Gld- Figs. 11, 12. 



Gould, in Terr. Moll. U. S., II, p. 82 (Lake Concordia). Binney, Terr. 



MoU. U. S., V, p. 419; Man. Amer. Land Shells, p. 44L 

 Succinea forsheyi Lea, Proc. A. N. S. Phila., 1864, p. 109; Obs. Gen. Unio 



XI, 134 (Rutersville, Texas). 

 Succinea Imleana Lea, Proc. A. N. S. Phila., 1864, p. 109 (Alexandria, La.). 

 Succinea halei Lea, Obs., XI, 136 (n. n. for S. ' ~ 



Distribution, Gulf States from Florida to the Rio Grande, on mud 

 or herbage near the water's edge. Common from Louisiana west- 

 ward, probably rare and local eastward. 



The type locality, Lake Concordia, is not in Texas, as Gould and 

 Binney supposed, but in Louisiana. The lake is an abandoned ox- 

 bow of the Mississippi river, opposite Naches, Mississippi. Some of Lea's 

 original lot of S. halei (haleana) before me show that to be merely the 

 young of concordialis. S. forsheyi Lea, of which two cotypes are in 

 the Philadelphia collection, is surely identical with concordialis. 



An adequate knowledge of the distribution of S. concordialis east- 

 ward awaits further exploration of the Gulf coastal peneplain, which 

 in Mississippi, Alabama, Georgia and Florida has been very imper- 

 fectly examined for land molliLsks. I have not seen S. wilsoni Lea, 

 described from Darien, Ga., the figure of which looks a good deal like 

 concordialis, though it seems to be less swollen basally. Specimens col- 

 lected by Mr. A. A. Hinkley at Cypress creek, Ala., in 1895 are evi- 

 dently concordialis ; and a set of very pale shells, corneous instead of 

 amber-colored, before me from Mayport, Florida, collected by i\L A. 

 Mitchell about twenty years ago, seems to agree with concordialis in 

 everything but color. Northward it extends to Frierson (L. S. Frier- 

 son) and Bayou Pierre (George Williamson), in northwestern Louisiana, 

 the specimens from these places being rather small. .The species must 

 also extend in a long lobe up the Mississippi and its tributaries, for 

 typical specimens have lately been sent by Mr. A. A. Hinkley from 

 Dubois, Illinois, and by Mr. T. Van Hyning from Des Moines, Iowa. Mr, 

 Van Hyning notes that ' ' the animal is black with small yellow dots. ' ' 

 These Northern shells may be distinguished from »S. retusa by their 

 pot-bellied figure and reddish apex. 



In Texas, specimens were taken by us in April at San Marcos, Hays 

 county; New Braunfels, Comal county; San Antonio, Bexar county; 

 along the Rio Grande near and San Filipe river, at Del Rio. and along 

 the Devil's river, Val Verde county. We have seen it also from Lee 

 county (Singley) and Spring creek, Victoria county (J. D. Mitchell). 



It lives on the moist earth immediately adjacent to the water's 

 edge, and where found is usually abundant. It is a thin shell, rather 



