Flying Lizards Pterodactyles. 



Flying: 

 Lizards. 



Wall-case, 

 No. 1. 



one of the 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 vertebra? in some genera (as in Rhampho- 

 rliynclius) was greatly elongated and stiffened with slender 



FIG. 2. The nearly entire skeleton of Pterodactylv.s spectabitis (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 (i.e. r 

 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 Pterodactyles, with both 

 long and short tails, and varying greatly in size, have been 



