X Preface. 



Wortman ; No. 26. on the Amblypoda, by Osborn ; 

 Ko. 29. on the Canida:, Viverrid(E and Procyonidcs, 

 by Wortman and Matthew ; No. y^^, on the Rhinocer- 

 oses of Europe, by Osborn ; No. 35, on the Creodonta, by 

 Matthew ; No. 40, on the Titanotheres, by Osborn ; No. 

 43, on the Eocene Primates, by Osborn. 



Systematic Revisions. — We have also taken up 

 one group after another, and have succeeded in giving 

 a more or less complete and final revision of certain of 

 the groups, incidentally determining questions as to 

 priority, synonymy and the location of type specimens. 

 Among the papers of this character have been the fol- 

 lowing: No. 2, Species of Coryphodon, Earle ; No. 8, 

 Upper Cretaceous Mammals^ Osborn; No. 12, Puerco 

 Alammals, Osborn and Earle ; No. 10, Species of 

 Hyracotheriuni, Wortman ; No. 21, Puerco Mammals, 

 Matthew ; No. 26, Pantolambda and Coryphodon, Os- 

 born ; No. 35, Creodonta, Matthew ; No. 36, American 

 Species of Equus, Gidley ; No. ^3, Eocene Primates, 

 Osborn ; No. 46, the HypertragulidcB, Matthew ; 49, 

 Cretaceous Actinoptcrous Fishes Hay ; No. 53, Mt. 

 Lebanon Fishes, Hay. 



Morphological Series. — The chief morpholog- 

 ical or anatomical papers are the following : No. 3, 

 Protoceras, Osborn and Wortman ; No. 5, Acerathe- 

 rium tridactylum, Osborn ; No. 9, Patriofelis, Wort- 

 man ; No. 14, Agriochccrus, Wortman ; No. 18, Psitta- 

 cotherium, Wortman ; No. 22, Teleoceras, Osborn ; No. 

 23, Coryphodon, Osborn; No. 25, Phenacodus, Osborn; 

 No. 30, Oxycsna, Wortman ; No. 32. Equus scotti, 

 Gidley : No. 34. Oxycena and Patriofelis, Osborn ; No. 

 41, Dinocyon, Matthew ; No. 42, Buncelurus, Mat- 

 thew ; No. 45, Ceratogaulus, Matthew ; No. 46, Hypi- 



