9^0 The American Naturalist. [November, 
lithic flints in beds of corresponding age, on the San Diego 
Creek, Texas. I append a list of the species so far obtained from 
the Equus Beds of Silver Lake. 
Holomeniscus vitakerianus Cope. 
hesternus Leidy. 
Eschatiiis longirostris Cope. 
" conidens Cope. 
Equus major Dekay. 
" occidentalis Leidy. 
" excels2is Leidy. 
Elephas primigenius Blum. 
Canis latrans Say. 
Lutra fpisciiiaria Leidy. 
Castor fiber L. 
Aj-vicola sp. 
Thomoinys bulbivorus Licht. 
" ; clusius Coues, 
Mylodon sodalis Cope. 
AVES. 
Podiceps occidentalis Lawr. 
" californicus Heerm. 
Podilymbus podiceps Linn. 
Graculus macropus Cope. 
Anser hypsibatus Cope. 
" canadensis L. 
" albifrons gambeli Hartl. 
" near nigricans Lawr. 
Cygniis paloregoniis Cope. 
Fulica amcricana Gmel. 
And numerous other species. 
Le2iciis altarcus Cope. 
Myloleucus gibbarcus Cope. 
Cliola angustarca Cope. 
Catostovms labiatus Ay res. 
batrachops Cope. 
