APPENDIX. 201 



3 [ar.s] 1. 



Marsh, Proceedings Philadelphia Academy, Jan., 1870, p. 5; American Journal Science, 



Vol. XLIX, p. 211, March, 1870; Vol. V, p. 229, March, 1873. 

 A. Milne-Edwards, Recherches Oiseaux Fossiles, Tome II, p. 541, 1869-71. 

 Coues, Key to North American Birds, p. 349, 1872. 



A somewhat smaller species than the one last mentioned, and from 

 the same locality and formation. 



The known remains (number 845) are in the Museum of Yale College. 



POSTSCRIPT. 



The plates of Part I of the present memoir, with their accompanying- 

 pages of explanation, were printed in 1877, and those of Part II, in April, 

 1878. The text of Part I was nearly all printed in 1878, and that of 

 Part II, in the following- year, or early in 1880. This delay in printing 

 will account for the fact, that some recent publications are referred to in 

 the Appendix, rather than in the text ; and that a few of the illustrations 

 prepared for the present volume first appeared elsewhere. 



