AVES. 



No. 191. Brontozoum giganteum, Hitch. 



Single Track (impres- 

 sion and relief), on slab. This 

 is the largest tridactyle impres" 

 sion ever discovered. It meas- 

 ures eighteen inches in length, 

 embracing an area of thirteen 

 inches square within its out- 

 lines, and is capable of holding 

 two quarts of water. The mid- 

 dle and outer toes measure 12 

 and a half inches, — length of 

 claw, 1.75 inch. The print is 

 remarkably well defined, hav- 

 ing all the fidelity of a plaster- 

 cast. It was discovered by 

 Dexter Marsh in the Liassic (?) 

 Sandstone at Northampton, 

 Mass., and belongs to the Bos- 

 ton Society of Natural History. 

 Size, 20 x 15. Price of either 

 impression or relief, $4.00. 



No. 192. Brontozoum giganteum, Hitch. 



iiililll 



51 



Mm 



■no 



JBH 



Ittr 





mwmm 





Tracks, on slab (relief). This specimen exhibits about fifty tracks with the 



