PARASTRAPOTHERIUM HOLMBERGI 153 



The following measurements are taken from specimen 

 No. 3328: 



Scapula, greatest length 694 mm. 



Scapula, greatest width 283 mm. 



Scapula, glenoid fossa, ant. -post, diameter 130 mm. 



Scapula, glenoid fossa, transverse diameter 90 mm. 



Scapula, height of spine 120 mm. 



Scapula, width of enlarged margin of spine at the lower end 170 mm. 



Scapula, width of margin in middle 45 mm. 



The humerus was associated with the two scapulae 

 mentioned above, and is complete. For such a large 

 animal, its length is excessive, greater than that of the 

 species assigned by Gaudry to P. herculeum which species 

 has a skull larger than that of P. holmbergi. 



Humerus, greatest length 720 mm. 



Humerus, greatest width across proximal end 248 mm. 



Humerus, least diameter of shaft 78 mm. 



Humerus, width across the epicondyles 220 mm. 



Humerus, width of trochlea on distal end 125 mm. 



The femur which Gaudry figures as belonging to Astra- 

 potherium magnum corresponds, as far as the distal end 

 will admit comparison, with the one which we found in 

 the Deseado beds, so that in restoring the outline of the 

 missing parts, I have based it on this A. magnum. 



Femur, length (estimated) 4 8 mm - 



Femur, width of distal end 135 mm - 



Femur, width of trochlea 57 mm - 



Parastrapotherium ephebicum Ameghino 



P. ephebicum Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. 639. 

 P. ephebicum Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. 449. 

 P. lemoinei Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. 640. 

 P. lemoinei Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. 450. 

 Astrapotherium ephebicum Gaudry, 1904, Mem. Soc. Geol. France, t. 12, p. 15. 



Ameghino based this species on a portion of the mandible 

 of an old individual with molars I and 2. Its chief dis- 

 tinction lies in its small size as compared with P. holmbergi. 

 Gaudry assigned to this species some upper teeth. We 



