1906.] NATURAL SCIENCES OF PHILADELPHIA. 161 
Succinea grosvenori Lea. 
Proc. A. N.S. Phila., 1864, p. 109 (Santa Rita Valley, Kansas?, and Alex- 
andria, Louisiana) ; Obs. Gen. Unio, etc., XI, p. 135, pl. 24, fig. 108. 
S. mooresiana Lea, Proc. A. N.S. Phila., 1864, p. 109 (Court House Rock, 
Platte river, on the California route); Obs., XI, p. 136, pl. 24, fig. 109. 
S. lineata W. G. Binney, Proc. A. N.S. Phila., 1857, p. 19; Man. Amer. Land 
Shells, p. 174. 
This species is characterized by its very full, rounded whorls and 
irregular sculpture, often with traces of spiral lines, though as frequently 
without them. Having part of the original specimens of the above 
synonyms before us, we are convinced that the three supposed species 
cannot be separated, although one would hardly expect the same form 
to range from the lower Mississippi to and throughout the arid great 
plains and the mountain region of Colorado and New Mexico. 
Succinea greerti Tryon, described from Vicksburg, Mississippi, is a 
little less swollen, with the suture not quite so deep, but it is doubtful 
whether the slight differences shown by the lot of eight specimens 
will prove constant. 
The species belongs to the campestris group. 
We took a few specimens of S. grosvenori at San Antonio, Texas, with 
S. concordialis and a large form of S. avara. 
Succinea avara Say. 
Texas: San Marcos, Hays county; Comal county; San Antonio, 
Bexar county; Devil’s river, Val Verde county. Arizona: Benson, 
Cochise county. 
AURICULIDA. 
Caryohium exile H.C. Lea. 
San Marcos, Hays county; New Braunfels, Comal county; Hondo 
river, Medina county, and Devil’s river, Val Verde county, Texas. 
Common in drift débris. 
Carychium exiguum (Say). 
Drift of Hondo river, Medina county; of Devil’s river, Val Verde 
county, and of Guadalupe river, Comal county, Texas. 
LYMN AIDA. 
Lymnea columella Say. 
New Braunfels, Comal county, Texas. A single slender specimen. 
Lymnea desidiosa Say. 
Texas: San Marcos, Hays county; New Braunfels, Comal county; 
San Antonio, Bexar county; Rio San Filipe, Val Verde county. 
Lymnea humilis Say. 
Guadalupe river, Comal county, Texas. 
