490 



Annals of the Carnegie ISIuseum. 



center. When a block has been outHned, and it is decided where it 

 is to be detached, it is bandaged and undermined to that ])oint, and 

 easily broken off from the main ledge in the quarry. The broken 

 surface of the block and the corresponding face of .the quarry are now 

 carefully shellacked to prevent the contacts from crumbling. The 

 different faces of the blocks are lettered and numbered to facilitate 

 work in the laboratory. Plaster of Paris and strips of burlap, together 



Fic. 3. Face of the Agate Spring 

 feet long. 



lujsil < )uanv. Each numbered section is tive 



with flour-paste and delicate strips of muslin, where they are needed 

 in protecting the bones and to firmly hold the block together, are the 

 materials employed in connection with quarries of this kind. 



A Provisional List ok the Fauna. 



Of the more important forms found in the quarry the following 

 may be mentioned. 



Diccratheriiiiii Marsh, the remains of which are ai)parently most 

 abundant. Other genera of rhinoceroses, besides Diceratheriiiiii, are 

 also present. Some fifty or sixty skulls, lower jaws, and other 

 skeletal material of rhinoceroses have already been taken out of the 



