126 DIXOCERATA. 



Measurements of Fourth Metacarpal. (Dmoceras lucare, No. 1038.) 



m. 



Total length of fourth metacarpal, -. .117 



Diameters of proximal end, _ _ 047-.064 



Diameters of distal end, .... . 054-.041 



Diameters of shaft (a])proximate), . _ _ _ _ 02T-.039 



Antero-posterior diameter of articular face for unciform (approximate), .060 



Transverse diametei's of articular face for unciform (approximate), 021-040 



Antero-posterior diameter of articular face for third raetacarj)al (approximat \ 050 



Transverse diameters of articular face for third metacarpal (approximate), . . _..012-.020 



Antero-posterior diameter of articular face for fifth metacarpal, ,_.. 042 



Transverse diameters of articular face for fifth metacarpal (approximate), . _ . . ..080-.018 

 Diameters of articular face for phalanx, ..032-042 



Measurements of Fourth Metacarpal. {Dinoceras, No. loUS.) 



m. 



Total length of fourth metacarj)al, .096 



Diameters of proximal end (approximate), ._ 040-.061 



Diameters of distal end, 045-034 



Diameters of shaft (approximate), - 020-.033 



Antero-posterior diameter of articular face for unciform, . .. .058 



Transverse diameter of articular face for unciform, . _ _ . . .040 



Antero-posterior diameter of articular face for fifth metacarpal, ... .042 



Transverse diameters of articular face for fifth metacarpal, 040-017 



Diameters of articular face for phalanx, 023-039 



Measurements of Fourth Metaciirpal. {Tinoceras ingens. No. 1219.) 



m. 

 Total length of fourth metacarpal, 117 



Diameters of proximal end, __ 054-071 



Diameters of shaft (appi'oximate), . _ _ 028-.04() 



Antero-posterior diameter of articular face for unciform, 064 



Transverse diameter of articular face for unciform (approximate ' 048 



Antero-posterior diameter of articular face for third metacar})al, _ . .055 



Transverse diameters of articular face for third metacarpal, 014-019 



Antero-posterior diameter of articular face for fifth metacarpal, .047 



Transverse diameter of articular face for fifth metacarpal, 020 



Diameters of articular face for phalanx, 030—042 



