76 Trans. Acad. Sci. of St. Louis. 
yellow clay. At the highest point, the bluffs are only 
about 20 feet, but average about 15 feet for a distance of 
about a quarter of a mile. The gully is dry during the 
greater portion of the year. A few small water pockets 
are fed by tiny springs but the moisture evaporates so 
rapidly that a running stream is seldom formed. The 
majority of the hollows in the bed are filled with rain 
water. A few of them are as much as a foot in depth, 
but the average is only three or four inches. The bluffs 
are constantly shaling off and the bed of the gully is 
strewn with small shattered masses of limestone. ‘The 
hill on the east side is covered with a heavy growth of 
Rock Cedar, Juniperus sabinoides Nees, and the one on 
the west side with numerous trees, shrubs, and vines of 
many species. 
FAUNA. 
MAMMALIA. 
8 Peromyscus maniculatus pallescens Allen. 
REPTILIA. 
4 Holbrookia texana Troschel. ¢ Cnemidophorus gularis B. & G. 
5 Kumeces quinquelineatus Linn. 8 Kutaenia proxima Say. 
5 Leiolepisma laterale Say. ? Storeria dekayi Hollbrook. 
AMPHIBIA. : 
3 Bufo ameircanus Le Conte. - ® Rana pipiens Schreber. 
8 Bufo valliceps Weig. 8 Lithodytes latrans Cope. 
® Acris gryllus crepitans Baird. 
MOLLUSCA. 
Helicina orbiculata tropica Jan. Bulimulus dealbatus liquabilisRve. 
Praticolella berlandieriana Mor. Bifidaria sp. 
Polygyra mooreana W. G. B. Vitrea indentata umbilicata Sing. 
Polygyra texasiana Mor.(Banded ° Omphalina friabilis W. G. B. 
form) 6 Agriolimax agrestis Linn. 
Polygyra roemeri Pfr. Pyriamidula alternata Say. 
< 
’ These species were found only in the gully. 
4 East Hill, living among rocks and around the bases of the cedars. 
5 West Hill only; among leaves and around stumps and fallen trees. 
® Not recorded in the writer’s report on the Mollusca of McLennan County 
(Nautilus XXI1: 63-67. 1908), and since found only at this place. The slug was 
identified by Bryant Walker. It is not uncommon and is found under fallen 
branches and pieces of dead bark.. Very few living examples of Omphalina 
were discovered, but hundreds of weather-worn shells are imbedded in clay 
and strewn along the rocks on both sides of the gully. 
Ga 
