84 BthliograpMcal Notices. 



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

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

 soJieliv and PeJecorapis (Fishes,). 3. Niobara : I^atatorial Birds, 2, 

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

 Testudinata, 3 ; Pythonomorpha, 27 ; Isospondyll, 31 ; Selachii, 10. 

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

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

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

 Bitter-Creek and Bear-River groups are regarded as of Tertiary 

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

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

 Seven good plates illustrate this portion of the Report. 



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

 Dinosaurs — Agathaumas sylvestris, 



Hadrosavrus occidentalis, 

 Cionodon arcfatiis, 

 Polyonax mortuarius ; 

 Crocodile — Bottosaurus perrngosus ; 

 Testudinates — Tnonyx vagans, 



Plastomenus (?) punctulatus, 



(?) insignis, 



Adocus (?) lineolatus, 

 Compsemys victus, Leidy. 

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

 as new : — 



Mammals — Eohca^ileus (Loarolophodon') galeaUts, 

 Achcenodon insolens, 

 Phenacodvs primavus, 

 Orotherium index ; 

 Fishes — HJiineaster pectinatus, 

 Amyzon commune, 

 Clupea theta. 



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

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

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



Of the Rodentia : — Eumyx, 1 ; Sciurus, 1 ; Gymnoptychus, 2 ; 

 Heliscomys, 1 ; Ischyromys, 1 ; Pcdceolagiis , 4. 



Of the Perissodactyla : — Symhorodon, 7; Byracodon, 1 ; Acera- 

 therium, 3 ; Anchifherium, 4. 



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

 dv^,l; Hypertragidus,2; Leptonuryx,! ; Stibarus,! ; Pelonax,2. 



Of Carnivora : — Hycenodon, 2 ; Amphicyon, 1 ; Canis, 4 ; Buncft- 

 lurus, 1 ; Daptophilus, 1 ; Hoploplioneiis, 1. 



Of Quadrumana : — Menotlierium, 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. 



