XI. 



RHAMPHORHYNCHUS BUCKLANDI. 



223 



The coracoid is smaller, shorter and straighter, narrow toward the 

 sternum, widening and thickening toward the scapula, where it 



m/ 



Diagram LXXIII. Rhamphorhynchus Bucklandi. Scale one-fifth of nature. 



i. The shoulder girdle : 8. Scapula, c. Coracoid. Ti. Humerus. r. and u. Kadius 

 and ulna. 2. The wing-finger: r. and u. as before, ca. Place of carpus. /.Small 

 fingers, m. Large external metacarpus, followed by p { . first ; p {l . second ; p m . third ; 

 and p iv . fourth phalanx. 3. Eibs : r 1 . r&. and r ili . in order of position. 4. Curved 

 bone, conjecturally mentioned as clavicle. 



makes a small part of the glenoid cavity. The drawing represents 

 the interior aspect of these bones, and shows only, by the sort of 

 notch near the proximal end of the scapula, the mark of the glenoid 

 cavity. 



There is no known clavicle for any of the pterosaurians. In the 

 course of examining a great number of bones I have found the 

 small peculiar arched bone represented in Diagram LXXIII. fig. 4, 

 which appears sufficiently like the clavicle of plesiosaurus to raise 

 a conjecture of its being really homologous. Length 0-9 inch. 



The coraco-scapular bone supports a curiously-bent strong 

 humerus, with a broad furcate proximal head. The drawing is 



