8G8 



GEOGRAPHICAL ZOOLOGY. 



[PziRT IV. 



extend into the Soutli Temperate zone, liavc six families, Avith one 

 peculiar to them ; while the Oriental region, which is wholly 

 tropical, possesses the five cosmopolitan families only. 



There are about 78 genera and 552 species of Anseres, giving 

 G9 species to a family, a high number compared with the 

 Waders, and due to there being only one very small family, the 

 Colymbidpe. The distribution of the Anseres, being more deter- 

 mined by temperature than by barriers, the great regions which 

 are so well indicated by the genera and families of most other 

 orders of birds, hardly limit these, except in the case of the 

 cenera of Anatidoe. 



Order X.—S TB UTRTONES. 



Family 12r..— STRUTHIOXID.E. (2 Genera, 4 Species.) 



General Dlstribution. 



Neotropical I Nearctic I Pal.*;ariTic 



SUB-BEGIONS. SdB-REGIONS. SUB-KEOIONS. 



Etiiioi'Ian 

 sub-kegion"s. 



1 



— 2 



Okikntal 

 Sub-regions. 



Alstralian 



SLB-aCOIONS. 



The Ostriches consist of two genera, sometimes formed into 

 distinct families. Struthio (2 sp.) inhabits the desert regions of 

 North, East, and South Africa, as well as Arabia and Syria. It 

 therefore just enters the Paltearctic region. Rhea (3 sp.) inhabits 

 Temperate South America, from Patagonia to tlie confines of 

 Brazil. 



Family 127.— CASUAPTID.E. (2 Genera, 11 Species.) 



General Distribution. 



Nkotropical I Nearctic Pal.earctic Ethiopian Oriental Australian 



SiB-REGioNs. Sub-regions. Sub-uegionh. SuB-RiiGioN.s. Sub-regions. Sub-regions. 



1.2 



The Cassowaries and Emeus are confined to tlie Australian 

 region. The Emeus, Dromrn/^ (2 s]).), are found only on the 



