858 



PHYLUM CHORDATA : CLASS MAMMALIA 



more of the femur, and the vertical position in which 

 they are carried, elbow and knee are low^er than usual, 

 and the gait is peculiar ; the carpal and tarsal bones have 



Fig. 509. — Vertical almost median section through elephant's 

 skull. — From a Specimen. 



C, Occipital condyle ; CR.C, cranial cavity, very small compared 

 with entire skull ; ME., mesethmoid ; S.O., supra-occipital ; 

 PA., parietal ; FR., frontal, greatly lightened by the development 

 of air-sacs ; NA., position of nasal ; A.N., anterior nares ; N.P., 

 nasal passage ; P.N., posterior nares ; MO., a molar tooth ; 

 MX., maxilla ; PMX., premaxilla into which the tusk (T.) is 

 seen coutitmed. 



Cf\C 



flat surfaces ; the feet are broad, and bear five hoofed 

 toes embedded in a common integument. There are no 

 clavicles. 



The skull is very large, being adapted to support the 

 proboscis and tusks, and to aflPord a broad insertion for 



