REVIEWS 317 



Article XI. Evolution of the A?nblypoda, Part I. Taligrada and 

 Pantodonta. By Henry Fairfield Osborn. 



Article XII. Additional Characters of the Great Herbivorous Dino- 

 saur Camarasaurus. By Henry Fairfield Osborn. 



Students of vertebrate paleontology will find interesting mate- 

 rial in this bulletin. Professor H. F. Osborn contributes five articles 

 and Dr. J. L. Wortman contributes one. Professor Osborn describes 

 Ttleoceras fossiger, a complete skeleton of which has been mounted 

 in the American Museum, and calls attention to some of its salient 

 characters. A complete skeleton of Coryphodon radians is also described 

 and figured. A study of this skeleton has revealed a number of new 

 morphological features which have an important bearing on the resto- 

 ration and classification of the animal. 



The interesting Phenacodus primcsvus of Cope's collection has been 

 removed from its original matrix and mounted. The bones are thus 

 placed in their natural position and rendered available for detailed 

 study. 



"The Evolution of the Amblypoda " is a somewhat extended 

 article and is not complete in this bulletin. The author discusses the 

 origin of the Amblypoda and gives a synopsis of their evolution 

 together with descriptions, relations and classification. The results of 

 of Part I are well expressed in the author's own words, " First, the 

 demonstration of a number of phyletic lines of Coryphodons. Second, 

 that certain Coryphodons approach the Dinocerata in some structures 

 as closely as they depart widely from them in others." 



The reptile, Camarasaurus, is described from new material which 

 shows characters hitherto unknown. The author points out its relations 

 to Brontosaurus, with which it compares in size, and writes of its habits 

 and peculiarities. 



Dr. Wortman writes in detail of the Camelidae of North America. 

 He reviews the known genera and species and adds the descriptions of 

 several new ones. The descriptions of many of the old forms are 

 amplified from new material. He makes a careful study of the Came- 

 loids and gives their evolution as near as the incomplete knowledge of 

 the forms will follow. 



W. T. Lee. 



