1 8 Anatomy of the Rabbit. 



Phylum CHORDATA. Animals with notochord and gills. 



t Protozoa, Annulata, Mollusca, etc., invertebrate phyla. 



Sub-Phylum CRANIOTA. Chordates with organized head region. 



t AcRANiA. Lancelets.. Also Ascidians and worm-like Chor- 

 dates, sometimes separately classified. 



VERTEBRATA. 

 Class MAMMALIA. Warm-blooded craniotes, with hair coat. 

 Young nourished from mammary glands, 

 t Pieces, Amphibia, Reptilia, Aves, lower vertebrate classes. 



Sub-Class PLACENTALIA. Mammals with placenta. 



t Marsupialia. Viviparous mammals without placenta. 

 ■ t Monoteemata. Oviparous mammals. 



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

 t Carnivora, Ungulata, Primates, etc. Various placental 

 orders otherwise adapted. 



Sub-Order DUPLICIDENTATA. Rodents with two pairs of 



upper incisors.. 

 t Simplicidentata. One pair ot upper incissors. 

 Squirrels, Gophers, etc.. 



Family LEPORIDAE. Hares and Rabbits. 

 t Ochodontidae. Picas). 



^Equivalent groups. 



