CONCLUSION. 179 



(9.) Five digits in maims and in pes. 

 (10.) Three bones in first tarsal row. 

 (11.) Astragalus, flat. 



The specialized characters of the Dinoccnita, acquired, doubtless, since 

 this line separated from the I'rofioiffulata, are as follows : 



(1.) Pi-e-nasal bones. 



(2.) No upper incisors. 



(3.) Canine tusks. 



(4.) Skidl surmounted with protuberances. 



(5.) Condyle of lower jaw, posterior. 



(6.) Pendent processes on lower jaw. 



(7.) Iliac bones, transverse. 



(8.) Femur and tibia in line. 



If we now compare the Dinocerata with the Cori/jihodoiitia, we find 

 they agree in the following characters : 



(1.) Brain, small, and nearly smooth. 



(2.) General form of teeth. 



(3.) Temporal fossil?, widely separated. 



(4.) Post-glenoid process. 



(5.) Odontoid process, conical. 



(6.) Vertebra;, flat. 



(7.) Scapula, acuminate. 



(8.) Feet, plantigrade. 



(9.) Five digits in manus and in pes. 



(10.) Axis of foot through third digit. 



(11.) Three bones in first tarsal row. 



(12.) Astragalus, flat. 



(13.) Fibula articulating with calcaneum. 



(14.) Cuboid articulating with astragalus. 



In comparing the Dinocerata with living forms, and first with the 

 Proboscidians, we find certain characters common to botli, some of which 

 at least, are general features, derived from a remote conmion ancestry. 

 The more importajit of tliese characters are as follows: 



