134 ANNALS NEW YORK ACADEMY OF SCIENCES 



Tinodon robustus Marsh 



Tinodon robustus Marsh, Notice of New Jurassic Mammals. Araer. 

 Journ. Sci., 3rd ser., vol. xviii, p. 396 (397), 1879. 



Triconodon bisulcus Marsh 



Triconodon bisulcus Marsh, Notice of Jurassic Mammals representing- 

 two New Orders. Amer. Jonrn. Sci., 3rd ser., vol. xx, p. 235 (237), 

 1880. 



The mammals are all archaic in character and belong to primitive 

 forms of marsupials and monotremes. They are known only from jaws 

 and teeth. 



Valuable information concerning the Morrison mammals is contained 

 in "American Jurassic Mammals," by 0. C. Marsh; "On the Structure 

 and Classification of the Mesozoic Mammalia/' by H. F. Osborn; and 

 "Evolution of the Mammalian Molar Teeth," by H. F. Osborn. For 

 further references the reader is referred to 0. P. Hay's "Bibliography 

 and Catalogue of the Fossil Vertebrata of North America." 



AVES 



Laopteryx priscus Marsh 



Laopteryx priscus Marsh, Discovery of a Fossil Bird in the Jurassic o*f 

 Wyoming. Amer. Journ. Sci., 3rd ser., vol. xxi, p. 341, 1881. 



, From the Morrison formation of Wyoming, probably from Como Bluff. 

 Known from part of a skull. 



REPTILIA 

 DINOSAVRIA 

 SAUEOPODA ^ 



Astrodon johnstoni Leidy 



Astrodon Johnston, Amer. Journ. Dental Sci., 1859. 



Astrodon johnstoni Leidy, Memoir on the Extinct Eeptiles of the 

 Cretaceous Formations of the United States. Smiths. Contr. Knowledge, 

 xiv, pp. 102, 119, 1865. 



This form is known from teeth only. It was discovered in the Arundel 

 beds of Maryland. 



8 This group will be treated thoroughly in the forthcoming monograph by Professor 

 H. P. Osborn. 



