Type of the Genus Massospondjlus. 115 



distal fracture ; and no. 371, which has nearly this width at 

 its proximal fracture, is 1 j3, inch wide at the distal end. The 

 distal extremities are rounded from above downward, some- 

 times with a slight concavity in the middle, and with lateral 

 pits for ligaments. 



The phalanges are as Made as the metatarsals. No. 375 



Superior surface. 



Lateral aspect. 



Distal. 



A metatarsal phalange. 4- nat. size. 



d and 1^ inch at 



(fig. 10) is lyV inch wide at the proximal end i 

 the distal end, 2-n, inches long, and 1 inch thick at its extremi- 

 ties, with all its surfaces slightly concave except the pulley- 

 sliaped distal end, at the sides of which are the usual concave pits. 

 No- 378 is smaller, being only 1 j'^o inch long, but the reduction 

 in thickness is not in proportion to the less length and breadth. 

 No. 379 is rather more slender and has the sides more con- 

 cave. These phalanges indicate a strong broad foot. The 

 terminal claw-phalanges 382,383,384, 385 present two types; 

 383 (fig. 11) and 385 have the posterior articular surface, which 



Fig. 11. 



Articular surface. 



Lateral aspect. 



A claw-phalange. 4- nat. size. 



is deeply concave, raised above the ground by a deep inferior 

 callosity, while in the other two there is no callosity. The 

 depth of the posterior end of no. 383 slightly exceeds 1^ inch ; 

 an oblique ridge descends the articular surface. The claw is 

 compressed from side to side, convex above, concave below, 

 tapering downward in front, but imperfectly preserved for a 

 length of 2| inches ; it may have lost half an inch. A small 

 lateral groove runs along the middle of the side. The thick- 

 ness, of the bone posteriorly is only about 



8* 



2 inch. No. 382, 



