46 GEOLOGICAL SURVEY OF TEXAS, 



to occur in higher beds, from its more equine foot structure. When we 

 come to species, the three which are identifiabl-e are new to science. 

 Three of the others are not distinguishable from corresponding parts of 

 known species. One of these is Loup Fork, one is Blanco, and the other 

 {Hippidium spectans) is of uncertain horizon. It is evident that the bed 

 in question represents an age intermediate between the Loup Fork and 

 Blanco terranes. 



