2 2 Department of Vertebrate Pahxontology. 



The model represents a charging Titanothere, and illustrates 

 a chief use of the great horns developed in these animals. 

 One-eighth natural size. Length of base, 25 inches. 



Price, $20. 



No. 7. Series of Heads of Titanotheres. 



This series of five heads represents the evolution and poly- 

 phyletic development of the Titanotheres during the Lower 

 Oligocene. 



a. Brontotheritim platyceras, 



b. Megacerops rohustus, 



c. Titanotheriu'in ingens, 



d. Symborodon acer, 



e. Diplacodon emarginatus. 



One-sixth natural size. 



Price, $j each; for the set, $20. 



No. 8. Restored Head of Dinocyon. Dinocyon gidleyi Matthew. 



Upper Miocene Epoch, Texas. One-fourth natural size. 



Based on the skull and jaws in the American Museum. 

 This gigantic dog equalled the polar or Kadiak bear in size, 

 and resembled them in many external characters. One- 

 fourth natural size. 



Price, $j. 



No, 9. Sabre-tooth Tiger. Smilodon. 



This restoration model is based on a complete mounted 

 skeleton of 5. necator in the American Museum. 



Smilodon, of the Pleistocene epoch, was the latest and 

 largest of the Sabre-tooth Tigers, equalling a polar bear in 

 size, and provided with canines which projected seven inches 

 from the jaw. It ranged through the New World from Canada 

 to Patagonia, and probably preyed on the great ground sloths 

 or other gigantic herbivora of the Tertiary Period, to pierce 

 whose thick hide and heavy fur the enormous canines were 

 well adapted. One-sixth natural size. Length of base, 14 

 inches. 



Price, $13. 



