24 ARCHAEORNITHES CHAP. 
a right, or even an acute, angle at their junction, and the centra 
of the vertebrae of the neck and back were biconcave. The bill 
was short and blunt, each side of the upper jaw possessing about 
thirteen teeth, of which six seem to have belonged to the prae- 
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Fic. 7.—Archaeopteryx lithographica. The Berlin specimen. (After Dames. ) 
maxilla; whereas in each side of the lower jaw only three can be 
recognised, and those towards the anterior extremity. These teeth, 
conical in shape and of fairly equal size, were fixed in a regular 
row, in distinct sockets. The fibula and tibia did not coalesce, 
the latter exceeding the metatarsus in length; the toes were four 
