WHOLE VOL. SKELETAL REMAINS OF EARLY MAN HRDLICKA 5 1 



as it were, a prolongation of the diaphysis upwards. This points 

 to a pecuhar condition of the musculus glutaeus medius (and the m. 

 gl. minimus) in Pithecanthropus." 



Judging from the characteristics of the upper portion of the femur, 

 the Pithecanthropus in Dr. Dubois' opinion " cannot have possessed 

 a human-shaped pelvis, but as the femur could to all appearance be 

 extended to a human degree, the pelvis may have been comparatively 

 more human than that of Hylobates and Chimpanzee. The tendon 

 of the glutaeus medius was inserted more posteriorly of the center 

 of rotation of the hip-joint, and produced, therefore, a stronger out- 

 ward rotation constantly accompanying the abduction. With fixed 

 leg the strong muscle brought the center of gravity of the body from 

 the other side above that leg, and turned the front of the trunk to 

 the other side. With such an unhuman pelvis the locomotion of 

 Pithecanthropus cannot have been exclusively, perhaps not even 

 chiefly, on the ground. The erect type was not perfectly developed." 



The characteristics of the hip-joint' and also the knee-joint " render 

 it probable that Pithecanthropus was less ground-walker than tree- 

 climber, but did not climb with a prehensile foot, in the way of 



Apes The femur of Pithecanthropus was, therefore, also fit 



for locomotion on the ground, but by no means adapted so exclusively 

 for it as in Homo sapiens and Homo ncandertalensis." 



MEASUREMENTS 



In his 1924 publications on the Pithecanthropus skullcap and femur 

 Dr. Dubois gives a series of measurements which doubtless are his 

 latest taken on the originals and are therefore of considerable im- 

 portance. The principal ones are as follows : 



LATEST MEASUREMENTS OF THE TRINIL SKULL BY DUBOIS 



Length max., deduced 18.4 cm. 



Length max., as obtained on the damaged specimen 18.05 



Breadth max 13.1 



Cranial index 71.2 



Calvarial height (height max. above the glabella-inion Hne) 6.1 



Diani. frontal min., now (8.7) 



Diam. frontal min., undamaged,, was probably 9.1 



External orbital facial breadth, estimated 1 1.5 



Fronto-biorbital index (percental relation last two diams.) 



approx. jg. 



Nearest approach of temporal lines, probably 8.5 



Sagittal arc-length : 



Frontal part lo.o 



Parietal 90 



Occipital, upper part 4.5 



