439 



2429. The distal epiphysis of the radius, with the bones of the hand of a large 

 Pteropus. 



The middle digit is fifteen inches in length, including the metacarpal bone. The large 

 scapho-lunar bone forms almost the whole of the first row of the carpus, and offers a deep 

 socket for the combined convex heads of the os magnum and uncifonne. 



Hunterian. 



2430. The humerus of a Pteropus, longitudinally bisected. The walls are thin and 

 compact ; the medullary cavity is large, and filled with the dried remains of 

 an oleaginous marrow. Hunterian. 



2431. The radius, longitudinally bisected, of a Pteropus. It presents the same in- 

 ternal structure as the humerus. Hunterian. 



Order CETACEA (Cetacea vera seu Carnivora, Cuv.). 



Family Balcenicke (Whales). 



Genus Balcena (True Whales). 



2432. The skull of the great Whalebone- Whale (Baltzna mysticetus, Linn.). 



It is remarkable for the enormous proportion of the facial to the cranial part of the skull, 

 and for the length and slenderness of the jaws, of which the upper one is arched vertically, 

 and the rami of the lower jaw are arched horizontally and bend towards each other. Both 

 jaws are edentulous : to the upper are attached in the recent animal the baleen-plates called 

 ' whalebone,' and the lower jaw is expanded to include these and protect the enormous 

 tongue. 



Hunterian. 







2433. The right ramus of the lower jaw of a smaller or younger Bal&na mysticetus. 



Hunterian , 



2434. The left ramus of the same lower jaw. Hunterian. 



* 



2435. The anchylosed cervical vertebrae of the great Whalebone- Whale (Balana 

 mysticetus). 



The true number of vertebrae here united together is shown by the intervals for the passage 

 of the nerves between the neural arches. This preparation illustrates a marked anatomical 



