i8 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 76 



dinosaur. This slab shows that the animal had a stride of 56 inches. 

 This specimen which weighed in the neighborhood of 1,500 pounds 

 makes a most important and interesting addition to the collection of 

 fossil footprints now on exhibition. A few separate tracks were also 

 secured at the same time. 



Fic. 23. — General \ icw of the place where footprints were found on the 

 President Monroe farm near Aldie, \'irginia. (Photograph Ijy C. W. Gil- 

 more.) 



PALEONTOLOGIC RPXONNAISSANCE IN THE GREAT BASIN 



Dr. Charles E. Resser, associate curator of paleontology, United 

 States National ^Museum, was detailed by Secretary Walcott to spend 

 the months of August and September, 1923. in reconnaissance strati- 

 graphic and paleontologic work in the Great Basin Ranges of Nevada 

 and Utah. This work was planned primarily to obtain information and 

 collections of Cambrian fossils to further the work of Dr. Walcott 

 in his monographic studies of the Cambrian and allied formations. As 

 the region to be studied was so extensive and lacking ordinary means 

 of travel, a Ford truck was purchased in advance at Elko, Nevada, the 

 starting point of the trip (fig. 24). 



Mr. M. C. Flohr of Washington, D. C, accompanied Dr. Resser and 

 ably assisted about the camp and in making the collections. Dr. Murray 



