24 CONTENTS OF A BONE CAVE. 



anterior border of the obturator foramen. The ischium has a flat section, with 

 the long axis subtransverse. The section of the pectineal part of the pubis is a 

 wide oval. There is a prominent transverse ischiatic tuberosity. The axis is 

 moderately elongate, and the summit of its neural spine is horizontal. The ante- 

 rior border of the neural arch is pierced by a large foramen on each side. The 

 diapophyses are small and originate as a keel on the posterior half on each side, 

 which continues into a short acute posteriorly directed process. The dorsal vertebra 

 is short and has an opisthococlian centrum. The diapophyses are short and with 

 down-looking articular surfaces, and the neural spine is narrow and high. 



The distal fossae of the humerus do not communicate ; the olecranar is deep. 

 The distal extremity is more transversely expanded than in Procamclus occidentalis. 

 The radius is flat, and with convex upper surface. The shaft is slightly arched 

 upwards, and the section of each extremity is a transverse oval of subequal long 

 diameters; the distal end has the greater vertical diameter. The shaft of the 

 femur is not very long and is subcylindric. There is a slight anteroposterior 

 curvature. The great trochanter is large, and is strongly recurved posteriorly. 

 The posterior cannon bones are rather stout, and the section at the middle is sub- 

 quadrate with rounded sides. Of the proximal facets the ectocuneiform is the 

 largest. The anterior cuboid is a quarter of a circle, and is separated from the 

 narrow posterior cuboid by a wide groove. The mesocuneiform is larger than the 

 posterior cuboid, and is rather wide; its posterior border forms a protuberance. 

 The inner extremity of the posterior cuboid is the most elevated part of the proxi- 

 mal end. 



The distal fissure does not extend above the bases of the epiphyses. 



MEASUREMENTS (WITHOUT EPIPHYSES). 



M. 



Length of axis on centrum (laterally) .... .023 



Total elevation of axis .... . .030 



Anterior diameter of centrum of axis J transv< ; rse 



(vertical . . .008 



Posterior ' " J transverse 



(.vertical . . .011 



Total elevation of anterior dorsal ..... .050 



Elevation of neural arch .... .012 



of spine .... -032 



Length of centrum . . . . . . .010 



of humerus ....... .081 



Transverse diameter proximally .... 



distally .... -023 



of shaft ... -009 

 Length of radius (chord) . . 

 Transverse diameter proximally .... 



medially. . . . .Oil 



distally . 



Length of femur ..... -0" 



Transverse diameter at trochanter .... 



medially. . -009 



" " distally 020 



