274 
GUY C. ROBSON. 
one time it is quite pale, at another of an intense black- 
brown, with every possible intermediate stage between the 
two. Now, I have observed in crabs about to moult and 
showing lipochrome in the blood, that the liver tends to 
become pale, as the following table shows : 
Table II. 
Inachus, Normal (January— April, 1911), showing 
Lipochrome in the Blood. 
Liver condition. 
Total. 
Pale. 
Intermediate. 
Dark 
94 
75 
13 
6 
Again the infected crabs have the same tendencv, though 
in a less degree : 
Table III. 
Inachus, Infected (January — April, 1911), 
showing Lipochrome in the Blood. 
Liver. 
Total. Pale. Intermediate. Dark. 
69 . . 39 15 15 
These infected crabs show a constant amount of fatty 
material in the liver, and the same is true of those young 
crabs just dealt with (Table II) and described as having 
colourless livers. It may be only a chance coincidence that 
the latter condition is found correlated with a constant 
supply of fat in the liver, or it may be an invariable and 
necessary correlation. If the latter is true, then we may 
state that the mature female in the breeding season may be 
similarly presumed to have an increased or more constant 
supply of fat in the liver-cells, as I found that towards April 
the liver of such animals was invariably pale. I admit that, 
in default of an extensive investigation of the liver of 
breeding females, we are compelled to resort to this pale 
