3 
Pterodactyles — Dimorphodon. 
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, 
No. l. 
Fig. 3. — The almost complete skeleton of Pterodcictylus antiquus, (Sommerring), from Table-case 
the Lithographic Stone, Eichstadt, Bavaria (J nat. size), a, humerus ; b, radius and i ’ 
ulna; c, carpus; d, metacarpus; e, clawed dibits ; /, g, h, i, phalangeals of ulnar * ’ 
digit; k, rib ; l, femur; s, tihia; r, tarsus; to, metatarsals ; t, t 1 , phalangeals of pes. 
Fig. 4. — Left lateral view of skull of Pteranodon lovgiceps (Marsh), from the Cretaceous 
of North America (Jj nat. size), a, preorbital vacuity; b, orbit; c, supraorbital 
crest; d, angle of mandible; £, quadrate; s, symphysis. (Not represented in the 
Collection.) • 
of these English examples is the Dimorphodon macronyx from Dimorplio- 
the Lias of Lyme, which had a large head, the jaws armed with don * 
lancet-shaped teeth, a long tail, and well-developed wings. The ^ al j" case ’ 
skull was 8 inches in length, and the expanse of the wings °’ 1 * 
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 
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