112 



Uria arra, 9. 

 Uromastix ornatus, 83. 



Wagtail, Swinhoe's, 41. 



yellow, 41. 

 Warbler, Eastern willow, 39. 

 Weasel, Kane's, 58. 

 Wheatear, 38. 

 Widgeon, 25. 



Xema sabini, 11. 

 Xenus, 21. 



PLATES 



[P.N.E.Z.C. 



Xenus cinereus, 21. 

 javanicus, 21. 



Yukon River, 11. 

 Yunnan, Mengtsze, 14. 



Zamenis asianus, 89. 



dahli, 89. 



nummifer, 88. 



rhodorhachis, 88. 

 Zenaida lucida, 101. 



zenaida, 102. 



PLATES. 



Plate I. 

 Map of Arctic coast of Siberia from East Cape to Kolyma. 



Facing 

 page 



66 



Plate II. 



Uenodaclylus elimensis and Stenodadylus guttatus. 



92 



Plate III. 

 Type specimen of Perosuchus fuscus Cope. 



106 



Plate IV. 

 Type specimen of Perosuchus fuscus Cope. 



106 



ERRATA. 



Page 74, line 8, for Abou read Abu. 



Page 78, line 3, for Hasbeya read Hasbeiya. 



