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 liquahilis. They are small (pi. VI, figs. 9, 10, 11), well striped 

 as usual, variable in the length of the spire, and generally have a strong, 

 narrow lip-rib. 



ram. 



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 (pi. VI, fig. 12). 



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 (pi. 

 VI, figs. 7, 8). They measure: 



The genitaha 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 liquahilis 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. 



