L906.] NATURAL SCIENCES OF PHILADELPHIA. 133 
} | 
Total length| Length 
| : é Length 
of penis, | of penis | Length j ae Masai 
| epiphallus ee insertion of cet initia (ah mien 
| and | of vas vagina. Hick 3 
| flagellum. | deferens). Se 
| | 
B a. marie | 
Pecos river | 58 | 34 | @ | 5 84,627 
Del Rio 45 29 | 84,635 
B. d. liquabilis | | 
San Marcos | 36 | 29 | 11 27 | 91,396 
| | | 
B. d. mooreanus | 
Guadelupe river 23 | 16 | 6 | 30 84,628 
B. d. ragsdalet | nit 
Devil’s river 16 10.5 | 5 17 | 84,638 
B. d. pecosensis 19 11.5 | 6 | 20 | 84,618 
24 1.5 | | 
B. dealbatus mooreanus (‘W. G. B.,’ Pfr.). Pl. VI, figs. 1-6. 
Pfr., Monographia Hel. Viv., VI, p. 1438 (1868). 
Bulimus schiedeanus in part, W. G. Binney, Terr. Moll., IV, p. 129, pl. 80, fig. 8. 
Bulimulus schiedeanus var. mooreanus W. G. Binney, Terr. Moll., V, p. 392, 
figs. 277, 278; Man. Amer. Land Shells, p. 400, figs. 438, 440. 
The shell is thin, ovate-conic, opaque white above, coffee-with-cream col- 
ored below the periphery, or sometimes either white or coffee-tinted 
throughout ; sometimes varied with a few gray streaks, or some scattered 
translucent-gray dots; surface smooth, with the spire more or less 
striate, apical whorls waxen or dark. Umbilicus narrow. Interior 
cream-white. Five specimens from New Braunfels measure: 
Alt. 26 22.5 25.5 23 22.5 mm. 
Diam. 16.5 13:05), 14 12 13 rf 
Aperture 15 12.8 12.6 11.8 £2.85 
Distribution, eastern division of the Lower Sonoran in Texas. 
Originally described from ‘‘ Washington and DeWitt counties, Texas.’’ 
Specimens from both of these are before us, and also from Hays, 
Comal, Guadalupe, Bexar, Medina, Frio, Uvalde and Victoria counties. 
Some shells from Fort Worth and Waco, in northern Texas, are also 
like mooreanus, while others resemble B. d. liquabilis. 
B. d. mooreanus is smaller, thinner and smoother than the Mexican 
B. schiedeanus (Pfr.), but intergrades with B. d. liquabilis Rve. through 
certain specimens having ragged dark streaks, chiefly on the spire, 
such as fig. 5 of pl. VI. In the main, the subspecies is quite uniform 
