1 8 Anatomy of the Rabbit. 



Phylum Chordata. Animals with notochond and gills. 

 ^{Various invertebrate phyla) 



Sub- phylum Craniota. Chordates with organized head region. 

 \{Acrania I 



VERTEBRATA. 



Class Mammalia. Warm-blooded craniotes, with hair coat. Young 



nourished from mammary glands. 

 ^(Lower vertebrate classes, Fishes, Amphibians, Reptiles, Birds). 



Si B-( i vss Placentalia. Mammals with placenta. 

 f(Monotremata — Egg-laying mammals). 

 f(Marsupialia — Viviparous mammals without placenta). 



Order Rodentia. Gnawing placentals, with chisel-like incisors, 

 f Various placental orders otherwise adapted, Carnivores, Ungul- 

 ates, Primates). 



Sub-order Duplicidentata. Rodents with two pairs of upper 



incisor teeth. 

 TfSimplicidentata — Squirrels, Gophers, etc.). 



Family Leporidae. Hares and Rabbits. 

 t(Ochodontidae — Picas). 

 ^Equivalent groups. 



