222 Prof. BucKLAND on the Pterodactj/lus Macronyx. 



and but little disturbed ; but the ungual and anterior part of the second bone 

 of the second finger are hid by the humerus. 



4. First bone of the fourth or wing-finger. — This finger liad probably 

 four phalanges ; parts of the two first, and an impression of part of the third, 

 are all that remain*. There is no vestige of a fifth finger. The proportions 

 of the phalanges of the first three fingers are as follows : The penultimal of 

 each is the longest; and of the phalanges of the second and third finger, 

 the antepenultimal is the shortest : the form of all the claws is that of a half- 

 crescent compressed, and sharp at the point. 



Pelvis. — The three bones of the right side of the pelvis are very distinct, 

 and nearly in place. M. Ilium. L. Ischium. Y. Pubis. 



N. left femur. N'. right femur displaced. 



O. right tibia. O'. left tibia compressed so as to give the false appearance 

 of a fibula, but there is no trace of a fibula near the right tibia. 



T. Tarsus. — The bones of the tarsus are too much covered with pyrites to 

 be made out : portions of two only are visible. 



P. Four bones of metatarsus of the left foot distinct and undisturbed, their 

 lower side being uppermost ; the metatarsus of the right foot is concealed. 



R. Phalanges of the left toes ; all the ungual bones are wanting. 



In the first toe, there remains a fragment of the first phalangal ; — in the 

 second toe, a fragment of the first and of the second phalangal ; — in the third 

 toe, the first phalangal entire, and portions of the second and third; — in the 

 fourth toe, four bones remain, the ungual only being lost; of these the penul- 

 timal is the longest, and the second and third shortest, as in the P. longi- 

 rostris and in lizards : these second and third bones of the fourth toe, and 

 the second bone of the third toe, are depressed and partly covered by a frag- 

 ment of the second phalangal bone of the wing, which I have taken off and 

 replaced. 



R'. Toes of the right foot much dislocated ; one claw alone remains at R"; 

 it is smaller than the smallest claw of the first finger at S. 



The lensth of the foot and of the tibia and femur shows that the animal 

 must have stood firmly on the ground, where, with its wings folded, it pro- 

 bably moved after the manner of birds. It could perhaps also perch on trees, 

 and lay hold of their branches with its foot and toes, like birds and lizards. 



* Plate XXVII. 4. 5. 6. 



