534 Proceedings of Boy al Society of Edinburgh. 
D 
Kidneys . — The kidneys are placed at approximately the same 
level ; the caudal extremity of the left being only about 5 mm. 
nearer the pelvis than the same extremity of the right. It seems 
not unreasonable to account for the more caudal position of the 
right kidney of Lagothrix , as compared with Cercocebus, as being 
due to the large size of the caudate lobule of the liver. The 
dimensions of the kidneys are as follows : — 
Length 
Breadth 
Thickness 
Right Kidney. 
71 mm. 
35 „ 
25 „ 
Left Kidney. 
65 mm. 
34 „ 
25 „ 
The kidneys of Lagothrix being not unlike those of Cercocebus in 
form, it will suffice to point out in what particulars they mostly 
differ from the same structures in the latter animal. The left is not 
so broad, but it is decidedly longer, and its extremities are almost 
alike. The right is also slightly longer and a little narrower than 
in Cercocebus. So that it will be seen that the two kidneys in 
Lagothrix resemble each other very closely in form, and both have 
a shape not unlike that of the right kidney of Cercocebus. 
Adrenals . — The right adrenal has an extraordinary shape. It is 
much elongated, and fits into a cranny formed by the caudate lobule 
of the liver, the vena cava, and the diaphragm. (See its surface of 
contact with the liver shown in fig. 5.) It may again be asked if 
the large size of the caudate lobule is a factor in the production of 
this curious feature. The left adrenal only differs from that of 
Cercocebus in being somewhat less flattened in a dorso-ventral 
direction. It is not placed quite on the extreme cephalic ex- 
tremity of the kidney, but rather more mesially than in Cercocebus. 
Comparison of the Length of the Intestine with the Length of the 
Body. 
Noe (31) has recently suggested the substitution of another 
method for the time-honoured plan of comparing the length of the 
intestine with the length of the body. He compares the length of 
the intestine, measured from the pylorus to the anus, with the 
weight of the body, and so obtains a “coefficient” expressed in 
metres per kilogramme. His observations were conducted with 
a view to contradicting the classical assertion that the character of 
