104 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I3I 



Genus IGNOTORNIS Mehl 



Ignotornis Mehl, Amer. Journ. Sci., ser. 5, vol. 21, May 1931, p. 443. Type, 

 by monotypy, Ignotornis mccomielli Mehl. 



Ignotornis mcconnelli Mehl ^4 



Ignotornis mcconnelli Mehl, Amer. Journ. Sci., ser. 5, vol. 21, May 1931, 

 p. 444, fig. I. 



Cretaceous (Dakota sandstone) : About i^ miles northwest of 

 Golden, Colorado. 



Genus LAOPTERYX Marsh 



Laopteryx Marsh, Amer. Journ. Sci., ser. 3, vol. 21, April 1881, p. 341. Type, 

 by monotypy, Laopteryx prisctis Marsh. 



Laopteryx priscus Marsh 35 



Laopteryx priscits Marsh, Amer. Journ. Sci., ser. 3, vol. 21, April 1881, p. 341. 



Upper Jurassic (Morrison formation) : Quarry 9, Como Bluff, 

 southern Wyoming. 



Genus LAORNIS Marsh 



Laornis Marsh, Amer. Journ. Sci., ser. 2, vol. 49, March 1870, p. 206. Type, 

 by monotypy, Laornis edvardsianus Marsh. 



Laornis edvardsianus Marsh ^s 



Laornis edvardsianus Marsh, Amer. Journ. Sci., ser. 2, vol. 49, March 1870, 

 p. 206. 



Paleocene (Homerstown marl) : Near Birmingham, New Jersey. 



Genus PALAEONORNIS Emmons 



Palaeonornis Emmons, Amer. Geol., pt. 6, 1857, p. 148. Type, by monotypy, 

 Palaeonornis struthionoides Emmons. 



Palaeonornis struthionoides Emmons ^~ 



Palaeonornis Struthionoides Emmons, Amer. Geol., pt. 6, 1857, p. 148, fig. 114. 



? Triassic : Anson County, North Carolina. 



3' Described from fossil impressions of 4-toed footprints, apparently with webs 

 connecting the three anterior toes. 



35 J. D. Dana, Amer. Journ. Sci., ser. 5, vol. 12, July 1926, pp. 3, 4, considered 

 the avian affinity of this supposed species as not definitely certain. 



38 Doubtfully related to Anseriformes. Lambrecht, Handb. Palaeorn., 1933, 

 pp. 526-527, has placed it uncertainly after the Aramidae. 



37^ Affinity doubtful : possibly not avian. 



