0 



THE GEOLOGIST. 



logous organ is slender, without any opposable digits, and so weak 

 that it could only have afforded a very feeble support (figs. 2 and 3, 

 p. 3). We do see nothing in the Ramphorhynchus approaching to 

 the powerful claws of the Pappenheim long-tailed bird. 



The foregoing diagram (p. 5) will afford an idea of the distribution 

 of the various orders of birds in Mesozoic strata. 



The following table shows the distribution of some of the more 

 striking types of Pterosauria throughout the upper Mesozoic beds. 



Distribution of Pterodactyles. 



Lower Lias. 



Upper Lias. 



Stonesfield Slate. 



Bath Oolite. 



| Forest Marble. 



1 Oxford Clay and 

 1 Solenhofen Beds 



Coral Bag. 



1 Kimmeridge 

 I Clay. 



j Purbeck Beds. 



Hastings Sands. 



Weald Clay. 



Lower 

 Greensard. 



ft 83 



o 



Lower Chalk. 



Middle Chalk. 



Upper Chalk, j 



X 



































X 



































X 







































X 

































X 

































X 

































X 

































X 

































X 

































X 











































X 





































X 

































X 

































X 





































X 

































X 















X 

































X 

 X 































































Dimorphodon macronyx 

 D. Bantliensi3 . . . 

 Pterodactylus Bucldandii 

 P. longirostris . 

 P. crassirostris . 

 P. KocMi . . 

 P. medius . . 

 P. grandi3 

 P. brevirostris . 

 P. Meyerii . . 



P. sp 



P. Fittonii . . 

 P. Sedgwickii 

 P. siraus . . . 

 P. Cuvierii . . 

 P. compressirostris 

 Ramphorbyncbus long 

 11. Gemmingii . 

 R. ML'msterii 



icaudus 



Fossil birds' feathers have not alone been obtained from the Solen- 

 hofen slate. In the Miocene rocks of Bonn, as well as inBraunkohl, 

 near Aix, examples have been discovered. 



"We are sorry there is a crack in the Archa?opteryx stone, and an 

 absent piece just wliere we would rather not have missed it : that 



