1906.] NATURAL SCIENCES OF PHILADELPHIA. 135 
tinguishable from those of Alabama, though most others could not 
be matched from east of the Mississippi. On the whole, the race 
has intimate relations to those east and west of it, yet seems in its 
own area to be sufficiently differentiated to be recognized. 
Specimens from Jackson county (collected by J. D. Mitchell) are 
typical of liquabilis. They aresmall (pl. VI, figs. 9, 10, 11), well striped 
as usual, variable in the length of the spire, and generally have a strong, 
narrow lip-rib. 
Alt. 18.7 20.5 18.5 118 21 mm. 
Diam. 12 12.5 ih 10 12 y 
Aperture 11.5 11.5 10 9.5 PED 1% 
Whorls 54 53 6 6 64 
Shells from Lee county (J. A. Singley), are larger, more globose, cor- 
responding to Reeve’s B. confinis. The corneous-brown tint largely 
predominates over the reduced whitish streaks. Lip-rib present in 
adults (pl. VI, fig. 12). 
Alt. 19 22 25 17.6 mm. 
Diam. 14 14 15.2 eS 6 
Aperture 12 13 14.8 103 WS 
Whorls — 6 64 6 
Waco specimens mostly have the spire longer, as do those from 
Belton, Austin and San Marcos. In the series from the latter locality 
(Ferriss and Pilsbry, 1903) there are about equal numbers of typical 
striped shells and nearly unicolored corneous-brown ones, with indis- 
tinct whitish streaks alternating with pale reddish on the spire (pl. 
VI, figs. 7, 8). They measure: 
Alt. 25.5 25.0 26 mm. 
Diam. 14 15 tab 
Aperture 14 14 14 a 
The genitalia of one of the unicolored shells are figured (fig. B). 
The individual supplying the preparation was that shown in fig. 7 of 
plate VI. Fig. 8 of the plate, a streaked shell, was found similar 
anatomically. Judging by these shells, the race liquabilis is quite 
appreciably different from mooreanus in the proportions of the geni- 
talia. 
Some specimens from Limestone Gap, Indian Territory, evidently 
belong to this race. 
