116 GENERA AND SPECIES OF BIRUS, 



4. glacialis, Lijni- (p. 40fi.) Arctic N. Aniericii & 



N.E. Asia. 

 N.W. Europe, Iceland. 

 California, Mediterranean 

 countries {winter). 



6. adamsi, Grai/. (p. r>00.) Arctic N. America & 



N. Asia to Novaya 

 Zemlya. Lapland. 

 Japan, N.W Europe 

 {winter). 



II. ColDmboiUfiS, Mihie-Edw. 



(Lydekker, Cat. Toss. B. p. 192, 1891.) 



1. minutue. MUne-Edw. (L., p. 192.) France (Lower Miocene). 



2. aXiiUtMi. Lydekker. (L., p. 192.) England ( Upper 



Pliocene). 



Order X. HESPERORNITHIFORMES. 



(Odontolco', Lydekker, Cat. Foss. B. p. 202, 1891.) 



Family 1. HESPERORNITHID^. 

 (Lydekker, t. c. p. 204.) 



I. ^tsptrornts, Marsh. 



(Lydekker, t. c. p. 205.) 



1. regaltfi. Marsh. (L., p. 20.5.) N. America : 



W. Kansas (Cretaceous). 



2. rrassiprs. Marsh. (L., p. 209.) N. America: 



W. Kansas (Cretaceous). 



3. grariltS, Marsh. Amer. Journ. Sci. si. p. 510 N. Ainerica : 



(1870)- ^' I'^'i^s^* (Cretaceous). 



II. CDniornt'S, Marsh. 



(Marsh, Amer. Journ. Sci. (3) xlv. p. 81, 1893.) 



1. altUS, Marsh, I. c. Montana (Cretaceous). 



