638 General Notes, [June, 
of life, or vice verséd. Of such we have an example in Ligia, but 
here, as in all, the air respired must be damp. 
Especial attention may be given to the sympathetic nervous 
system, the arrangement of which ‘is as yet only incompletely 
known. It is much more complex than that of the Decapod 
and the splanchnic system appears to be analogous to that of the 
recurrent intestinal nerves of Limulus, arising, as the nerves do, 
from the hindermost of the nerves of the body. On the other 
hand, there is a close resemblance between the minute structure 
of the nervous system of the Isopoda and the Decapoda. 
COMMENSALISM BETWEEN A Fisn anD A Mepusa—In pke 
signment from the Mauritius, G. Lunel found ppe th the 
melampygus and Crambessa palmipes. The fish stuc a eui 
greater part of its body in the apertures which are form 
trav- 
eo : ect a ; 
four columns uniting the stomach with the n bet not be 
ersed by the gastro-vascular canals. This union the 
serine’ by the hypothesis that the animal had pee be- 
other as its prey and means of nourishment; for the me but 
longs to a family which possesses no proper se e in very 
only a series of microscopic pores, which can me! taken up his 
finely-divided nourishment, and the fish had penn was only ea 
quarters in a natural hollow of the medusa, whic of the fish 
larged, but in no way injured, by the long residence i 
It was ascertained that the fisherman had take 
mone, and going in and out of it. 
fish had entered was living, for it could be seen 
ore 
. . . * 4 use i 
unknown peculiarity of their opa with particular neon | 
a diet more congenial to their age, asce 
ntless 
to the upper regions of the sea, to find 
there the cou 
Ee ST et Cee Py ee gee 
a the 
ar 
certain are = 
