LIASSIC PTERODACTYLES. 467 



■wing, is bent back npon the fore-arm, crosses the dislocated mandible, and has been 

 pressed npon it, long and hard enough to leave a channel in the right ramus, where part 

 of the phalanx has been removed : its length is 4 inches f) lines. 



The second, more slender and longer phalanx (/, 2), is bent at nearly a right angle 

 with the first, and lies below and parallel with the mandible ; it is nearly 5 inches in 

 length. The third phalanx (/,-. 3) is bent upward in front of both lower and upper jaws : 

 4^ inches of its length is preserved in the slab : from the analogy of the better pre- 

 served specimens (PI. 16, ir. 3), about 1 inch 3 lines are wanting from the 

 distal end. 



Of the three unguiculate digits the characteristic large claws are preserved : one (//) lies 

 above the frontal (ii) with the penultimate phalanx ; the other two are between the upper 

 and lower jaws, with some of the slender phalanges : all these parts of the ranuis having 

 been dislocated and scattered. 



Parts of the distal ends of the radius and ulna (54', 55'), the metacarpal of the 

 wing-finger (/',«'), and the proximal end of its first phalanx {i^'r'), of the opposite fore- 

 limb, occupy a lower corner of the slab : carpal bones, one of the accessory styloid ossicles 

 of the forearm, some of the slender metacarpals of the claw-fingers can be made out 

 above these : and there are more obscure indications of vertebrae at that end of the slab, 

 curving toward the cranium. 



All the osseous and dental textures are black, as if charred by slow combustion of the 

 animal matter. 



UiMORrnoDON macronyx. pi. 16. 



In August, 1868, I was favoured by the Earl of Enniskillen, then at Lyme Regis, 

 Dorsetshire, with a hst of parts of a Pterodactyle, in a slab of Lias al)out 20 inches by 

 1 1 inches, and of other parts in detached portions of Lias, including the entire tail with its 

 bone-tendons, which his Lordship had observed at Messrs. James and Henry Marder's, 

 the judicious and persevering collectors of the fossils of that rich locality. 



The result of this valuable and timely information was the securing for the British 

 Museum the entire series of these Pterosaurian fossils. 



They proved to be parts of the Bimorphodon macronyx, confirmed many of the 

 observations made on previously acquired specimens, corrected others, and added almost 

 all that was required for the restoration of the skeleton of this remarkable genus and 

 species, which I have accordingly attempted in Pi. 17 [Plerosanria). 



The slab of Lias with the second specimen, including the skull of Dimorjjhodon macronyx, 

 is of larger size, shows more of the skeleton and in a more separated and definable state 



