No. 2328. PLEISTOCENE VERTEBRATES IN UNITED STATES— HAY. 131 



extent. In these deposits are to be found numbers of bones and 

 teeth, some admirably preserved, but often broken up, as is shown 

 by the fragments of limb bones of large proboscideans. 



Usually the bones are entirely free from the matrix, but some- 

 times they are encrusted by the deposit of travertine. On the walls 

 of the cave and of the shaft leading to it there are, as shown by the 

 drawings, stalactitic deposits. On the floor are blocks of fallen rock. 

 No lower opening from the cave is known, but Mr, Schuchardt sus- 

 pected that there had been one formerly at the north end ; and the 

 heaping up of materials at that end appears to add probability to 

 this view. This or any 

 other opening w o u 1 d, 

 however, probably be, 

 not into the free air, but 

 into other caves. While 

 some bones may have 

 been washed into the 

 cave through such open- 

 ings, it seems probable 

 that most of the remains 

 are those of animals that 

 fell into the cave through 

 the open shaft. 



It is to be hoped that 

 the coming season will 

 bei a favorable one, so 

 that Dr. E. H. Sellards, 

 of the Texas Geological 

 Survey, may be able to 

 carry out his plan for 

 working this important 

 deposit. From Mr. Schuchardt's collection there have been deter- 

 mined the following list of fossil vertebrates : 



-A SECTION OF THE CAVE ALONG THE LINE A-B 



OF Fig. 1. 



\Alisodon mirus^ new genus and 



species. 

 \Terrapene whitneyi. 

 \T. tulverda., new species. 

 \(TOfherus atascosae? 



Crotalus atroxf 



Didelphis virginiana. 

 \ Bison, sp. indet. 

 \Ma7n7nut americanuTn. 

 \Elephas primigenius. 



Of these 18 species those marked by the f may be fairly regarded 

 as extinct. These would constitute 55 per cent of the whole number. 



Peromysciis, sp. indet. 



Geo7nys texensis? 



Perodipus, sp. indet. 



Sylvilagus, sp. indet. 



Ursus americanus. 



Cards latrans. 

 f A eno cyon dims ? 

 \Dinoh(istis serus. 

 \FeUs, sp. indet. 



