24 THE GEOLOGICAL EVIDENCES 



true teeth in the extremities of both the upper and 

 lower jaws, which teeth were implanted in distinct 

 sockets, as in the more highly constituted reptiles. 

 The body was provided with well-developed feath- 

 ered wings, but again, departing from true birds, 

 the rest of the body, except the tail and parts 

 of the legs, appears to have been either largely 



Head of the Berlin Archseopteryx. 



naked, or but scantily clothed with feathers ; the 

 legs and feet were bird-like in structure, but in 

 the hand and tail we have a remarkable combi- 

 nation of reptilian and avian characters. The 

 latter, instead of being made up in principal 

 part of feathers radiating from a greatly con- 

 densed vertebral axis, is prolonged into a long 



