6 
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 Eamphorhynchus 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 Pterodactylls. 
Lower Lias. 
Upper Lias. 
Stonesfield Slate. 
Bath Oolite. 
Forest Marble. 
Oxford Clay and 
Solenhofen Beds 
Coral Rag. 
Kimmeridge 
Clay. 
1 Purbeck Beds. 
Hastings Sands. 
Weald Clay. 
Lower 
Green sand. 
o i 
Lower Chalk. 
Middle Chalk. 
Dimoiphodon macronyx . . 
D. Bantliensis 
Pterodactylus Bucklandii . . 
P. lougirostris 
P. crassiroslris 
P. Kochii 
P. medius 
P. grandis 
P. brevirostris 
P. Meyerii 
iP-sp 
X 
X 
X 
X X X X X X X 1 j 
X 
X 
X 
X 
X 
X 
P. Sedgwickii 
P. Cuvierii 
P. compressirostris . . . . 
Ramphorbynchus longicaudus 
R, Gemmingii 
R. Miinsterii 
X 
X 
X 
Possil birds' feathers have not alone been obtained from the Solen- 
hofen slate. In the Miocene rocks of Bonn, as well as in Braunkohl, 
near Aix, examples have been discovered. 
We are sorry there is a crack in the Archseopteryx stone, and an 
absent piece just where we would rather not have missed it : that 
