MAMMALIA. 401 



Sub-Class IT. Ovovivipara. 



Order 12. Marsupialia : Families ; Thylacinidae, Dasyuridae, Didelphidae, 



Peramelidae, Phalangistidee, Halmaturidae, Phascolomyidae. 

 Order 13. Monotremata: Fam., Echidnidae, Ornithorhynchidae. 



The above systematic arrangement does not appear satisfactory to us, 

 and we therefore substitute the one which follows, although well aware 

 that it is far from being perfect. It will no doubt undergo some changes 

 in the relative position of the minor groups ; but so far as our great groups 

 follow each other, we are confident that they express more exactly the 

 development of the mammalian structure. 



Class Mammalia. 



I. Quadrumana. 



Simiadse, Cebidae, Lemuridae, Galeopithecidae, Chiromyidse. 



II. Carnivora. 



a. Unguiculata. 



1. Di^itigi'ada. 



Felidae, Hyaenidae, Canidae, Viverridae, Mustelidae. 



2. Plantigrada. 



Cercoleptidae, Procyonidae, Ursidae. 

 h. Pinnipedia. 

 Phocidae. 



III. Cheiroptera. 

 a. Frugivora. 



Pteropodidae. 

 h. Carnivora. 



Vespertilionidae, Vampyridae. 



IV. Insectivora. 



Erinaceidae, Soricidae, Talpidsß. 



V. Herbivora. 



a. Rodentia. 



Sciuridae, Castoridae, Muridae (including Myoxina, Dipodina, 

 Ctenodactylina, Murina, Spalacina, Arvicolina, Bathyergina, 

 Saccomyina), Hystricidae (including Hystricina, Dasyproctina, 

 Echimyina, Octodontina, Chinchillina, Caviina), and Lepo- 

 ridae. 



b. Ruminantia. 



Bovidae, Antilopidae, Cervidae, Moschidae, Camelopardalidae, 

 Camelidae. 



c. P achy der main. 



Equidae, Suidae, Hyracidae, Elephantidae, Palaeotheridae, Rhino- 

 cerotidae, Hippopotamidae, AnoplotheridaB. 



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