130 PROCEEDINGS OF THE ACADEMY OF (March, 
any but the smallest texasiana, and with about the same number of 
whorls (5 to 54) appears more closely coiled. It is constantly dis- 
tinct by the elongated columellar tubercle within the last whorl (shown 
in fig.9). This tubercle seems to be what Binney erroneously describes 
as “‘an internal transverse tubercle on the base of the shell’’—an ex- 
pression which would lead one to expect such a structure as that 
found in the Stenotremas. Binney states that the color is ‘‘white,’’ 
but fresh shells are brownish-corneous, a little paler and somewhat 
transparent at the base. The diameter varies from 6.5 to 8 mm. 
Variation in the degree of elevation is shown in the figures. 
P. mooreana was originally described from Washington county, 
Texas. We took specimens at Smithville, Bastrop county, San Mar- 
cos, Hays county, around New Braunfels, Comal county (figs 4-7), 
and on the Hondo river north of Hondo, Medina county (figs. 8, 9, 10), 
everywhere in copious quantity. There are also specimens before 
us from Washington county, Belton, Fort Worth, Waco, Austin and 
Lee county. Further records are given by Mr. Singley in his valuable 
catalogue. It was taken at Galveston by Ferriss. 
Polygyra mooreana tholus (W.G. Binn). Pl. V, figs. 1, 2, 3. 
Larger than mooreana, with the last whorl far more openly coiled 
below, exposing more of the penultimate whorl in the much wider 
umbilicus. Specimens from Washington county measure: 
Alt. 5.5, diam. 11, width of umbilicus 4.2 mm.; whorls 7. 
Alt. 4, diam. 8.2, width of umbilicus, 3 mm.; whorls 6. 
This form holds such a relation to P. mooreana as P. d. sampsoni to 
P. dorfeuilliana, being very openly coiled beneath, with a deep and 
very long groove on the last whorl within the umbilicus. The internal 
ridge is like that of P. mooreana. It seems to be comparatively local in 
distribution and is certainly rare. We have never seen a fresh specimen. 
It was described from Washington county, Texas, the locality of the 
specimens figured. It is in the collection of the Academy also from 
Calhoun county. Ferriss took a few specimens at Galveston, and Sing- 
ley found it in Fort Bend and Brazos counties. Von Martens reports 
a worn specimen found by Friedel at Vera Cruz, Mexico. 
Polygyra roemeri (Pfr.). 
Smithville, Bastrop county, Texas (Ferriss); San Antonio, Bexar 
county (Pilsbry and Ferriss); near New Braunfels, Comal county, one 
specimen (Pilsbry). 
BULIMULIDA. 
The genus Bulimulus in Texas has caused much perplexity to stu- 
dents. Many and diverse have been the views held as to the rank 
