Pterodactyles Dimorphodon. 3 



obtained from the Solenhofen Limestone in Bavaria others ptero- 

 occur in the Great Oolite at Stonesfield, near Oxford, and in dactyles. 

 the Lias formation, Lyme Regis, Dorset. The most remarkable Wall-case, 



FIG. 3. The almost complete skeleton of Pterodactylus antiquus (Sommerring), from Table-case, 

 the Lithographic Stone, Eichstiidt, Bavana (J nat. size), o, humerus; 6, radius and jf o> j t 

 ulna; c, carpus; d, metacarpus; e, clawed digits;/, ff. h, i, phalangeals of ulnar 

 digit; t, rib ; I, femur; s, tibia; r, tarsus; m, metatarsals ; t, t' t phalangeals of pes. 



FIG. 4. Left lateral view of skull of Pleranodonlonglceps (Marsh), from the Cretaceous 

 of North Ameiica (Jy nat. size), a, preorbital vacuity; b, orbit: c, supraorbital 

 crest ; d, angle of mandible ; */, quadrate ; s, symphyds. (Not represented in the 

 Collection.) 



of these English examples is the Dimorphodon macronyx from Dimorpho- 

 the Lias of Lyme, which had a large head, the jaws armed with d<m- 

 lancet-shaped teeth, along tail, and well-developed wings. The "Wall-case, 

 skull was 8 inches in length, and the expanse of the wings No ' l ' 

 about 4 feet (see Fig. 5). 



Many remains have been discovered by Prof. Marsh in the 

 Chalk of North America. One singular form, named by him 



2 2 



