TOOTHED AND LIZARD-TAILED BIRDS 



2347 



Descending lower in the geological series, and reaching those strata 

 lying below the chalk, such as the Portland limestone, and known as 

 the Jurassic series, we meet in certain Bavarian rocks, corresponding in 

 age to those of Portland, with remains of birds departing much more widely from 



Lizard-Tailed 

 Birds 



SKELETON OF UZARD-TAII.ED BIRD. 



existing types than any hitherto mentioned. These birds, of which but a couple of 

 imperfect skeletons, with impressions of the wing and tail feathers, are known, are 

 named Arch&opteryx , and constitute a group Saururce, or lizard-tailed birds re- 

 garded by some as of equivalent rank to the flying and flightless birds, but by others 



