52 Transactions. — Zoology. 



Claviculo-liumeral Index. 



The relation between the lengths of clavicle and humerus 

 was noted fifteen times, and the index was calculated accord- 

 ing to the formula — 



Length of clavicle x 100 

 Length of humerus 



The average of these fifteen indices is 45-8 — the maximum is 

 60-5, the minimum is 41-9. The left indices are higher than 

 those of the right side. 



Humerus. 



The length given is the distance between the highest part 

 of the head and the lowest point on the trochlear surface. 



I have measured forty-three bones, and these have an 

 average length of 310-3mm. The longest humerus measured 

 342mm., the shortest 285mm. Twenty of these belong to the 

 right side, and have an average length of 310-9mm. The 

 average length of the twenty-three left bones is 309-9mm. 

 This shows a trifling preponderance in length of the right 

 bones over the left. In the ten cases in which I was able to 

 compare the bones of the two sides I found the right the 

 longest bone eight times, and equal to the left twice. In 

 the fifty bones examined I found a supra-trochlear foramen 

 present in only three — that is to say, in 6 per cent. This 

 is very little higher than the proportion in which this 

 perforation occurs in Europeans, and differs greatly from 

 what I expected to find. M. Topinard'-' gives the percentage 

 of perforated bones among Polynesians as 34-3, and among 

 Melanesians as 14-1. There is certainly a very marked dif- 

 ference in this respect between the bones examined by him 

 and those of my series. 



In no bone did I see any trace of a supra-condyloid spine. 



Badius. 



The length is the distance between the upper surface of the 

 head and the tip of the styloid process. 



The number of bones measured was thirty-fivG. These 

 have an average length of 245mm. The longest bone mea- 

 sured 276mm., the shortest 216mm. The difference between the 

 right and left radii is slight, the seventeen right bones having 

 an average length of 246-6, the eighteen left bones averaging 

 244-7mm. 



Ulna. 



Two lengths are given — one, the maximum, from the highest 

 part of the olecranon to the tip of the styloid process ; the 

 other to the base of the styloid. 



* "Elements d'Anthropologio Gfe^rale," p. 1016. 



