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POPULAR SCIENCE MONTHLY 



plete. In the meantime Mr. Carnegie has ordered a cast of one of the 

 finest specimens (Diplodocus carnegiei) to be presented to the British 

 Natural History Museum in London, where this cast is now mounted. 

 Not content with these monster reptiles, the Carnegie Museum has sent 

 out other expeditions, for fossil horses, camels, titanotheres, and other 

 quadrupeds and carnivores which formerly inhabited the now desert 

 regions of South Dakota and Wyoming. 



The Late John Bell Hatchek. 



A year or so after, the Carnegie Museum and the Field Columbian 

 Museum of Chicago instituted a series of annual expeditions, chiefly for 

 the great amphibious dinosaurs found in Wyoming and Colorado. Un- 

 der Dr. E. S. Riggs some remarkable discoveries have been made, most 

 notable of which is a nearly complete skeleton of Brontosaurus in a 

 fine state of preservation. In central Colorado were found the arm 

 bone, or humerus, and thigh bone, or femur, of another reptile of the 

 same group of still more gigantic size. In most of these dinosaurs the 

 femur is decidedly longer than the humerus ; but in this beast, although 

 the femur is actually 6 feet 8 inches in length, the humerus is fully as 

 long. Dr. Eiggs has accordingly named this animal Brachiosaurus, 

 in reference to the great size of the braehium, or arm. 



