52 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 83 



Fronto-parietal index 90. 



Endocranial : 



r r. 1=^.5 cm. 

 Length max A j j ^^ 



Breadth max 12.4 



Index 80. 



Height max. (above the line of max. transverse diam.) 5.8 



Cranial capacity, present conclusion, approx 900 cc. 



LATEST MEASUREMENTS (AND PRINCIPAL NOTES) ON 

 THE FEMUR 



(Dubois)' 



Weight of the bone i ,018 grams 



(This is more than twice the weight of a similar nonfossilized- human femur 

 of same size.) 



Volume of the bone 485 cc. 



Volume of the bone without exostosis, nearly 467 cc. 



(On an average, negroes and ahso Australians have a slightly less voluminous 

 femur, at the same length ; in Europeans, on the other hand, it is on the average 

 much more voluminous.) 



Length, bicondylar 45.5 cm. 



At middle: 



Antero-post. diam 2.9 cm. 



Transverse diam 2.8 cm. 



Circumference 8.9 cm. 



The head : 



Transverse diam 447 cm. 



Sagittal diam. (perpendicular to preceding) 4.40 cm. 



Curvature of the diaphysis 8 mm. 



(In comparison with most human femora this curvature is slight, the summit 

 of the curve low. ) 



Angle of torsion 19° 



Angle of neck with shaft 123° 



The pressure-axis in man passes through the external condyle ; in the Trinil 

 femur it falls between the condyles. 



The convexity of the posterior surface of the lower end of the Trinil femur 

 exceeds that in any human femur known or described. 



GEOLOGICAL AGE OF THE TRINIL DEPOSITS 



As to the geological age of the deposits from which the Pithecan- 

 thropus remains were recovered, Dubois at first (1895) ^'^^ ""' 

 certain whether to attribute them to the latest Pliocene or early 

 Pleistocene, but later (1896) was inclined to regard them as Pliocene. 



* Dubois, E., On the Principal Characters of the Femur of Pithecanthropus 

 erectus. Proc. Acad. Sci. Amsterdam, Vol, 29, No. 5, pp. 730-743, a figs., 1926. 



