Geology and Palaontology. 
Eschatius longirostris Cope. 
Equiis major Dekay. 
" occidentalis Leidy. 
'* excelsus Leidy. 
Elephas primigenius Blum. 
Cauis latrans Say*. 
Ltitra ipiscinaria Leidy. 
Castor fiber -L* 
Arvicola sp. 
Thomomys talpoi'des* Licht. 
Mylodon sodalis Cope. 
Podiceps occidentalis Lawr. 
" californicus* 
Podtlymbus podiceps* 
Graculus macropus Cope. 
Anser hypsibatus Cope. 
" canadensis L. * 
albifrons gambeli.^ 
near nigricans Lawr^* 
Cygnus paloregonus Cope. 
Fulica americana* 
Leiicus altarcus. Cope. 
Myloleucus gibbarcus Cope. 
Cliola angustarca Cope. 
Catostomus labiatus Ayres.* 
batrachops Cope, 
n. From S. W. Texas we have the following species.* 
Equus barcencei Cope. 
f rater nus Leidy. 
excelsus Leidy. 
occidentalis Leidy. 
crenidens Cope. 
Elephas primigenius Blum. 
Canis sp. 
Glyptodon petaliferus Cope. 
Cistudo marnochii Cope. 
^corded 
From the Valley of Mexico the folio 
