2 
Flying- 
Lizards. 
Wall-case, 
No. 1. 
Flying Lizards — Fterodactyles. 
one of tlie fingers of the hand was enormously elongated to give 
support to the wing-membrane (patagium), which was attached 
to the sides of the body, the arm, and the long finger, and also 
to the hind-limb and tail. The other fingers of the hand were 
free and furnished with claws. The wing-membrane appears 
to have resembled that of the Bat, being destitute of feathers. 
The caudal series of vertebrae in some genera (as in BJiavipho- 
rliynchus ) was greatly elongated and stiffened with slender 
Fig. 2. — The nearly entire skeleton of Pterodactylus speclabilis (Meyer), from the 
Lithographic Stone, Upper Jurassic, Eichstadt, Bavaria, a is the pubis; on the 
right side the ilium is exposed (figured nat. size). 
ossified fibres (Figs. 1 and 5). The bones were pneumatic (he., 
filled with large air-cavities), the walls of the bones being very 
thin, and their substance very hard and compact, thus combining 
strength with lightness. 
Numerous remains of nearly perfect Pterodactyl es, with both 
long and short tails, and varying greatly in size, have been 
