Leboucg (loc. cit.) has given the actual measurements of the hand and foot of 
four specimens of Leptonychotes, together with the ratio that each bears to the body 
length. The measurements are taken from the radio-carpal and tibio-tarsal articulations 
respectively to the distal extremity of the first digit. 
have adopted the same points, and the measurements of the material in hand are set 
forth in the following Table, together with the ratios of the hand and foot to body 
length. 
SEAL-EMBRYOS8. 
TABLE II. 
SHOWING LENGTH OF Hann AND Foor AND RATIO OF EACH TO BopY LENGTH. 
For purposes of comparison I 
Numbers corre- . 
: Length of Hand Ratios to Numbers corre- Length of Hand Ratios to 
See and Foot. Body length. pa oa toe a ood Foot. Body length 
3 H. 4:0 6°2 15 H. 14:0 10°0 
F. 4:0 6°2 F. 14:0 10°0 
4 H. 4°5 6°8 16 H. 15:0 10°4 
F. 5:'0 75 F. 16°0 11:1 
5 H. 5:9 6°5 17 H. 14°0 9°5 
F. 5:0 6°5 F. 17°0 11°5 
6 H. 7:0 71 18 H. 16°0 10°5 
By 95 7°6 F. 18°0 10°8 
7 H. 9:0 9°0 19 H. 15:0 9°38 
FF. 8°5 8°5 F. 15°0 9°8 
8 H. 11°5 10°9 20 H. 16°0 10°1 
F. 11°5 10°9 F. 18°0 11°3 
9 H. 11°0 10°2 21 H. 18°0 11°2 
F. 11°0 10°2 F. 19°0 11°8 
10 H. 12°0 10°9 22 H. 18°0 11:1 
F. 12°0 10°9 F. 16°5 10°2 
11 H. 9°5 8°3 23 H. 18°5 9°7 
F. 10°0 8:7 F. 21°0 11°0 
12 H. 12°5 10°3 24 H. 65:0 11°6 
F. 13°0 10°7 F. 75°0 138°2 
13 H. 12°'0 9°5 25 H. 113°0 13°0 
F. 12:0 9°5 F, 127°0 14°6 
14 H. 13°0 9°9 
F. 12°0 9°1 
The figures are substantially in agreement with those given by Professor Leboucq, 
which I quote here for comparison. 
