FOSSIL BIRDS. 459 



Synthliboramphus antlquus (Gmelin). Ancient Murrelet. 



Alca antiqua Gmelin, Syst. Nat., I, Pt. ii, 1789, 554. 



Modern form reported from Pleistocene: Upper San Pedro formation, San 

 Pedro, California. 



Genus CERORHINCA Bonaparte, 



Cerorhinca Bonaparte, Ann. Lye. Nat. Hist. N. Y., II, 1828, 427. Type, 

 by monotypy, Cerorhinca occidcnialis Bonaparte = Alca monocerata 

 Pallas. 



Cerorhinca dubia Miller. 



Cerorhinca dubia L. H. Miller, Carnegie Inst. Wash., Publ. 349, Aug., 

 1925, 115, pi. 2. 



Miocene (Temblor horizon, Turritella ocoyana zone): Lompoc, California. 



Order COLUMBIFORMES. Pigeons and Doves. 



Suborder COLUMBAE. Pigeons and Doves. 



SuPERFAMiLY COLUMBOIDEA. Pigeons and Doves. 



Family COLUMBIDAE. Pigeons and Doves. 



Genus COLUMBA Linnaeus. 



Columba Linnaeus, Syst. Nat., ed. 10, 1, 1758, 162. Type, by subs, desig., 

 Columba oenas Linnaeus (Vigors, 1825). 



Subgenus? CHLOROliNAS Reichenbach. 



Chhroenas Reichenbach, Avium Syst. Nat., 1852, [1853], xxv. Type, 

 by monotypy, Columba monilis Vigors = Columba fasicata Say. 



Columba micula (Wetmore). 



Chhroenas micula Wetmore, Proc. U. S. Nat. Mus., LXIV, Art. 5, Jan. 15, 

 1924, 13, figs. 8-9. 



Upper Pliocene: 14 miles southeast of Benson, Arizona. 



