ABT. 18 



ON A NEW SKELETON OF DIPLODOCUS GILMORE 



21 



There was no evidence of a third phahmx on Digit III, although 

 the D. carnegii pes shows four. There was a single atrophied phalanx 

 on Digit V. The absence of this bone in the foot of I), carnegii sug- 

 gests that it may have entirely disappeared in some individuals of 

 Diplodocus, although present in Brontosaurus. Metatarsal V is much 

 stouter and has a wider and more robust proximal end than the cor- 

 responding element of the D. carnegii pes, but the proportions of the 

 other bones are remarkably similar. 



Table 6. — Comparative measurements of hind limbs of Diplodocus 



Measurement 



Femur: 

 Greatest 

 Breadth, 

 Breadth, 



Tibia: 



Greatest 

 Breadth, 

 Breadth, 



Fibula: 

 Greatest 

 Breadth, 

 Breadth, 



length 



proximal end 

 distal end 



length 



proximal end 

 distal end 



length 



proximal end 

 distal end 



U.S.N.M. 

 No. 10865 



Mm 

 1,600 

 349 

 298 



960 

 363 

 240 



1,055 

 216 

 175 



C. M. No. 

 84 



Mm 

 1,542 

 600 

 412 



C. M. No, 

 94 



Mm 

 1,470 

 390 

 366 



1,006 

 274 

 195 



1,050 

 213 

 155 



U. S. SOVERNHENT PRINTJNG OFFICE l«31 



