4.42 Prof. Carl Vogt on 
bination and their form, offered characters which are found 
in the Halosaurs, the Pterosaurs, and the Crocodiles. 
Fig. 3. 
Fore-limb of Rhamphorhynchus. Natural size. 
The humerus (f), the ulna (w), and the radius (r) have 
already been described with remarkable sagacity by Prof. 
Owen. The humerus, with its flattened articular head, offers 
some likeness to that of the Crocodiles. It bears no trace, any 
more than does the femur, of a pneumatic foramen, and 
nothing indicates the pneumaticity of the other bones, which 
is, however, established in the Pterosaurs. The bones of the 
fore-arm are separate throughout their whole length, and the 
ulna is stouter than the radius. Otherwise these bones offer no 
characteristic feature peculiar either to Reptiles or to Birds. 
The manus presents some peculiarities which must neces- 
sarily have escaped Prof. Owen, in whose specimen there were 
only its scattered and imperfect remains. 
The carpus (c), as Prof. Owen rightly says, shows only a 
single spherical bone. Birds and Crocodiles have two carpals, 
