SINCLAIR: MARSUPIALIA OF THE SANTA CRUZ BEDS. 375 



Sacrum, depth of posterior face of centrum of second sacral . . . .015 



" width " " " ' " 022 



Third caudal, approximate length of centrum ..... .0265 



" " width of anterior face of centrum ...... .023 



" " depth " " " " " . . . , . .015 



Fourth caudal, approximate length of centrum ...... .0255 



" " width of posterior face of centrum ..... .0225 



depth ' " " . . . .016 



Eighth caudal, length of centrum ........ .041 



" " width of posterior face of centrum ..... .0205 



" " depth " " ii ii o ,jj 



Ninth caudal, length of centrum . ..... .044 



" " width of posterior face of centrum . . . . . .02 1 5 



" " depth ""'<" ..... .016 



Scapula, length - .132 



" width of neck . . . . . . . . . . .03 1 5 



antero-posterior diameter of glenoid cavity ..... .026 



" transverse " " " "..... .022 



Humerus, length . . . . . . . . . . . .155 



" width of proximal end ........ -037 



" depth " " 0445 



" width of distal end 053 



" length, tip of supinator ridge to capitellum, inclusive . . . .063 



Radius, length . . . . . . . . . . . .130 



" antero-posterior diameter of head . . 015 



" transverse " " " . .0196 



" antero-posterior " " distal end . . . . . . .015 



" transverse " " " " .. 0275 



Ulna, length . .165 



" greatest width below sigmoid cavity .031 



" antero-posterior diameter of distal end .... .017 



Pelvis, length (approximate) ...... .184 



Ilium, width at greatest expansion ..... -0425 



Acetabulum, antero-posterior diameter .... .029 



" transverse " ... .026 



Femur, length from great trochanter to outer condyle . .198 



" width of proximal end ...... -0525 



" " distal " -042 



" depth of distal end -03 1 



" diameter at middle of shaft ... .017 



Patella, length . . . .0285 



" width -0225 



" greatest depth -OI2 



Tibia, length ...... I 7 2 5 



" width of proximal end ..... -395 



" " distal " 0235 



