MARSH. 1 , 



BRONTOSAURUS. 



173 



than any other of the known genera of the Sauropoda. The three 

 bones shown in fig. 16 were found nearly in the position represented. 



THE FORE LIMBS. 



The fore limbs of Brontosaurus, as in most of the Sauropoda, were 

 of large size and of massive proportions. The limb bones are all solid, 

 and those of the feet are quite robust. There were five well-developed 

 digits in the manus, and the metacarpals were all moderately elongate. 

 A characteristic example is shown in figs. 17-20, below. 



Fig. 17. — First metacarpal of Brontosaurus amplus Marsh ; front view. 



Fig. 1 8. — The same "bone ; side view. 



Fig. 19. — Proximal end of same. 



Fig. 20. — Distal end of same. 



All the figures are one-fourth natural size. 



THE HIND LIMBS. 



The hind liinbs of Brontosaurus were larger than those in front, and 

 the bones were all solid, thus being in remarkable contrast to the ele- 

 ments of the vertebral column. The hind feet were plantigrade, and 

 had five powerful digits. The first was very stout, and its terminal 

 phalanx, shown in figs. 21-23, supported a powerful claw. 



RESTORATION OF BRONTOSAURUS. 



Plate XLII. 



Nearly all the bones represented in this restoration belonged to a 

 single individual, which when alive was nearly or quite 60 feet in 

 length. The position here given was mainly determined by a careful 

 adjustment of these remains. That the animal at times assumed a posi- 

 tion more erect than here represented is probable, but locomotion on 

 the posterior limbs alone was hardly possible. 



