278 
GUY 0. ROBSON. 
V. Summary. 
The following appear to be the most salient points that 
can be deduced from the evidence cited above : 
(1) that infection by Sacculina induces the maintenance of: 
an abnormal quantity of fat in its host’s liver and blood ; 
(2) that this condition resembles that found in normal 
females and males preparing for the moult and in sexually 
mature females, the ultimate destination of the fat being 
functionally similar in the case of the mature females and 
the infected crabs ; 
(3) that in all probability the ultimate fate of the infected 
crab is death from starvation, arising from its inability to 
obtain enough fatty material for itself and its parasite ; 
(4) that a pink-coloured lipochrome is found in the blood 
of moulting and infected animals of both sexes, while a rich 
yellow characterises that of the sexually mature female. 
Bibliography. 
1. Smith, Geoffrey. — 4 Quart. Journ. Micr. Sci.,’ vol. 55, 2, 1910. 
2. ‘ Fauna and Flora des Golfes von Neapel,’ Monogr. 29. 
3. Heim, F. — 4 Ann. Soc. Ent. de France,* 1892, p. 155 and foil. 
4. Maly, R. — 4 Sitzungsber. K. Akad, Wissenscliaft. Wien.,’ Bd. lxxxiii, 
abtli. ii. 
