PHYSIOLOGY AND NATURAL HISTORY. 



459 



compare the views of this great comparative Anatomist with the systems in gene- 

 ral use. The groups below the rank of Orders are inserted merely as illustrations 

 of those ordei's, not as equivalent subdivisions, or as the most natural subdivisions 

 of those orders, into which it has not been the aim of the author on this occasion 

 to enter : 



Class. 



Sub-Class. Orders. 



Archencephala Bimana Homo. 



f i Catarrlana, 



j Quadrumana . X Platyrrhina , 

 Unguiculata . -j ( Screpsirhina. 



Carnivora ... ^\9^iW'''^^- 



. ( Pinnigrada, 



Omnivora. 

 inanlia. 



Gyreneephala ■{ 



MAMMALIA-! 



Ungulata. 



Mutilata . 



'Artiodactyla.-jg'"'*!^ 



PerissodactylaH^^*;f""5'"/«. 



j Elepkas. 

 l Dinotherhint . 

 j Toxodon. 

 \ Nesodon, 

 { Manatus. 

 { Halicore. 



Proboscidia. 

 Toxodontia . 



Sirenia. , 



Cetacea \:Delphinidw. 



Bruta . 



Cheiroptera 



Insectivora 



Rodentia . , 



Lyencephala . 



Marsupialia. 



Monotremata. 



C Bradypodidw, 

 < Dasypodidce. 

 ( Edentura. 

 j Frugivora, 

 I Insectivora, 



iTalpidce. 

 Erinaceidaa. 

 SoricidcE. 

 j Non-claviculata. 

 \ Glaviculata. 

 CRhizophaga, 

 3 Poephaga. 

 j Gorpophaga. 

 i^Entomophaga. 

 S Echidna. 

 \ Ornithorhynchus. 



Through the Linnsean Society also Mr. Selater has communicated his views on 

 the Geographical distribution of the Class Aves, in a paper of great interest 

 (Journal of the proceedings of the Linnajan Society, JSTos. '7 and 8 ) He first 

 divides the Earth's surface into jorimary kingdoms or provinces. Of these he 

 recognizes six — two in the new and four in the old world • one in each belonging 

 to the Arctic and temperate regions ; the other four to the warmer portion, In the 

 JSTorth American Province, containing 6^ million square miles, he finds 650 species. 

 In the South American Province, with 5|- million square miles, 2,250 spocies. la 

 the Northern portion of the old world, extending from the "West of Europe to 

 Japan, and including the basin of the Mediterranean, bounded on the South by 

 Mount Atlas, with 14 million square miles, he finds 650 species, la the Western 



