106 UNIVERSITY OF COLORADO STUDIES 



The few fossils of the Arapahoe and Denver beds should not be 

 expected here, as those formations do not occur until some distance is 

 reached from the foothills; but inasmuch as nearly all the species listed 

 are from formations which are found in the Boulder area, with few 

 exceptions they may be considered probably or possibly included in the 

 fossil fauna of this vicinity. 



The almost complete absence of brachiopods, bryozoans, corals, and 

 other lower forms in the Boulder area cannot escape notice. It is also 

 noticeable that the gasteropods are confined chiefly to the Fox Hills 

 formation. The largest invertebrates of the region are Baculites ovatus 

 and some species of Inoceramus. It is reported upon good authority 

 that many years ago some large fossil reptiles were taken up in the 

 Laramie formation at White Rock, but their whereabouts is unknown; 

 no definite data are now at hand concerning them, and none are found 

 exposed at the present time, though excavations might reveal some. 

 The only vertebrate material now on hand consists of the few remains 

 of fish mentioned hereinbefore, and the possible cast of a bone from 

 the Jura-Trias. None of the higher vertebrates have been yet found 

 here. 



