84 BihliograpMcal Notices. 



are new. The Cretaceous groups of strata yielding them are : — 

 1 (lowest). Dakota. 2. Benton, with Hypsoscmrus (Crocodile), Ap- 

 soheUx and Pehcorajyis (Fishes). 3. N lobar a : Natatorial Birds, 2, 

 and(?) Saururce, 2; Dinosauria, 1; Pterosauria. 4; Sauropterygia, 3; 

 Testudhmta, 3 ; Pythonomorjpha, 27 ; Isospondyli, 31 ; SelacJiii, 10. 

 4. Pierre : Reptiles and Fishes in New Jersey, Mosasauroids in 

 Colorado, 5. Fox Hills. The next group, Fort-Union ©r Lignitic, 

 is " Transitional," having a Cretaceous fauna with a Tertiary flora. 

 Bitter-Creek and Bcar-Iliver groups are regarded as of Tertiary 

 age, some portions being as late as the Miocene. The Loup-lliver 

 group, of Pliocene age, so rich in Equine remains, is also present. 

 Seven good plates illustrate this portion of the Beport. 



From the Fort-Union group Prof Cope describes (p. 444 &c.) : — 

 Dinosaurs — Agathaumas sylvestris, 



Hadrosaurus occidentalism 

 Cionodon arctatus, 

 Polyonax mortuarius ; 

 Crocodile — Bottosaiirus perrngosus ; 

 Testudinatcs — Trionyx vagans, 



Plastomenus (?) punctulatKS, 



(?) insignis, 



Adocus (?) lineolatus, 

 Compsemys victus, Leidy. 

 From the Eocene of Wyoming and Colorado, Prof. Cope describes 

 as new : — 



Mammals — Eohosileus {Loxolopliodon) galeatus, 

 Achcenodon insolens, 

 Phenacodris primatnis, 

 Oroiherium index ; 

 Fishes — Phineaster pectinatus, 

 Amyzon commune, 

 Clupea tlieta. 



The Vertebrates of the Miocene strata (White-River group) 

 occupy Chapter iv. p. 461. Their new Insectivora are: — Uerpeto- 

 therinm, 5 ; Embassis, 2 ; Domnina 3 ; Jsacis, 1. 



Of the Rodentia : — Emny.-i, 1 ; Scivrus, 1 ; Gymnoptychus, 2 ; 

 Heliscomys, 1 ; Ischyromys, 1 ; Palceolagus, 4. 



Of the Perissodactyla : — Symborodon, 7 ; Hyracodon, 1 ; Acera- 

 theri^im, 3 ; Anchitherium, 4. 



Of the Artiodactyla : — Oreodon, 2; Proebrotlierium, 1; Hypiso- 

 dus, 1 ; Hypertragidus, 2 ; Leptomeryx, 1 ; iStibams, 1 ; Pelonax, 2. 



Of Carnivora : — Hycenodon, 2 ; Amphicyoji, 1 ; C'miis, 4 ; Bunat- 

 hirus, 1 ; Daptophilus, 1 ; HopJophoneus, 1. 



Of Quadnimana : — Menotherium, 1. 



Testudinata, 5. Lacertilia, 7 ; Ophidia, 5. 



In the Pliocene strata of the Loup-Fork epoch there are : — 

 Carnivora, 4, Proboscidia, 1, 



Perissodactyla, 8, Testudinata, 1. 



Artiodactyla, 7. 



