THE FOHE FEET. 



103 



The scaphoid in two specimens of Diuoceras are represented in the 

 fignres bek)w. 



Fig 112 



Figure 112. — Left scaphoid of Diuoceras laticeps. Marsh (120i); sid. . . .. . 



PiGnRE 113. — Riglit scaphoid of Diuoceras minibile, Marsli (1200) ; sido view. 

 r. face for radius; tm. lace for trapezium; ir. face for trapfzoid. 



Both figures are one-half natural size. 



The principal dimensions of the scaphoid in three individuals of 

 Dinoceras are as follows : 



3Ieasureme)its of Left Scuplwid. (iJiiunxnix mirahiic. No. I20S.) 



m. 



Length of longitudinal axis of scajiboid, — .('77 



Length of transverse axes, -'- ()40-.0-19 



Antero-jjosterior diameter of radial articular surf .ace, _ - — 05 1 



Transverse diameter of radial articular surface, 04.t 



Antero-posterior diameter of distal articular surface, .070 



Transverse diameter of distal articular surface, — -- — — .044 



3Iea.mrci)ients of Iliijlit ."Scaphoid. [Diuoceras mirahilc. No. 1200.) 



m. 



Length of longitudinal axis of sca|)hoid, ..-- .071 



Length of transverse axes, ■- .073-0.54 



Antero-posterior diameter of radial articular surface, — . 046 



Transverse diameter of radial articular surface, 03 8 



Antero-posterior diameter of distal articular surface, .006 



Transverse diameter of distal articular surface, .038 



Measurements of Left Sraphoid. (lyiioieras lafii-ej's. No. 1-J64.) 



m. 



Length of longitudinal axis of scaphoid, .086 



Length of transverse axes, ■ .051 -.060 



Antero-posterior diameter of I'adial articular surface, .060 



Transverse diameter of radial articular surface, .046 



Antero-posterior diameter of distal articular surface, — .082 



Transverse diameter of distal articular surface, .050 



