Classification of Mammalia. 



177 



Cheiroptera and Quadrumana, we observe the remarkable 

 fact that they assume a general external resemblance to each 

 other, that they become monkey-like in features and habits. 

 They live above the ground, in trees and in the air; they are 

 chiefly nocturnal, and their diet has a general tendency to be- 

 coming frugivorous. That Cheiroptera proceed from the in- 

 sectivorous stem, the Quadrumana from the carnivorous stem, 

 the Bradipodidae from the tardigrade stem, a thorough compa- 

 rison of these types will convince every one. 



We give now the following Mammalian System : — 



MURID.E. 



I. QUADRUMANA. 



SlMIAD^E. 



CEBID.E. 



LEMUR1D.E. 



GALEOPITHECID,E. 



ChIROMY1D,E. 



II. CARNIVORA. 



a. UNGUICULATA, 



1. DlGITIGRADA. 



Felid^e. 



HYiENID^E. 



Canid^e. 



VlVERRID^E. 



mustellid^e. 



2. Plantigrada. 



Cercoleptid^e. 



Procyonid^e. 



Ursid^e. 



b. PINNIPEDIA. 



PflOCID,E. 



III. CHEIROPTERA. 



«. FRUGIVORA. 



PTEROPODID.E. 



b. CARNIVORA. 



Vespertilionid,e. 

 Vampyrid^e. 



IV. INSECTIVORA. 



Erinaceid^e. 



soricid.e. 

 Talpid,e. 



V. HERBIVORA. 



a. RODENTIA. 



sciurid.e. 

 Castorid^e. 



Myoxina. 



Dipodina. 



Otenodactylina. 



Murina. 



Spalacina. 



Arvicolina. 



Bathyergina. 



Saccomyina. 

 Hystricid^e. 



Hystricina. 



Dasyproctina. 



Echymyina. 



Octodontina. 



Chinchillina. 



Caviina. 

 Leporid,e. 



b. RUMINANTIA. 



Cameleopardalid^e. 

 Camelid^e. 



AnTELOPIDjE. 



Cerviid^s 



Moschid^;. 



Bovid^e. 



c. PACHYDERMATA. 



EQUID<E. ELEPHANTID.E. 



SuiDiE. Mastodontid^e. 



hyracid.e. rytinid.e. 



rhinocerotidje. hallchoridie. 

 Hippopotamib^e. Manatid^e. 

 Trichechid^e. Dinotherid>e. 



Anoplotherid^:. 



Pal^eotherid^e. 



VI. CETACEA. 



HETERODONTIDvE. 



Delphinid^e. 



PHYSETERIDiE. 

 BALiENIDjE. 



vol. lv. yo. CIX. — JULY 1853. 



M 



