Petf.rsox : Thk Acaik Spkinc; Fossil Ouakrv. 



489 



The irregular line on the diagram of the Agate Spring Fossil (Quarry 

 (see Plate XXL), marked "Outcroi) of the Fossil Layer" indicates 

 the contour of the hill before work was commenced. The region 

 marked "Cook Excavation" represents the area, which Mr. Cook 

 excavated in the fall of 1904. Mr. Cook, realizing the importance of 

 having the specimens preserved by the best and most modern styles 

 of collecting, kindly desisted from his operations, after receiving a 

 letter from the writer with an earnest appeal for postponement of 

 effort until the party from the Carnegie Museum should reach the spot 

 in the following spring (1905). From the line of Mr. Cook's explor- 



Fig. 2. Excavating in the Agate Spring Fossil Quarry. 



aiion the excavations and work were carried on by Mr. T. F. Olcott 

 from .-\pril until July, when the writer accompanied by Dr. J. A. 

 Hermann again joined the party, and continued work with it during 

 the remainder of the season of 1905. 'J'oward the latter part of the 

 season Mr. \V. H. LItterback also joined us and together we accom- 

 plished ([uite effective work. The blank area on the sketch indicates 

 the exjjosed layer where work will be resumed in the coming season 

 of 1906. 



The outlines of the blocks are nearly always irregular. This is due 

 to the method which we were sometimes forced to follow in working 

 aroimd an important si)ecimen in order not to break through its 



