with threads and fine nerves ruanint; between them, the 
whole showing much organised structure, and when torn 
asunder slightly, the fatty bodies appeared to be connected 
in strings of beads, by stalks, consisting of a tube and the 
contents of the granules, without a central axis. In the 
female, these bodies appeared more spherical, and closely 
aggregated in large continuous masses, filling the whole 
cavity of the body not occupied by the ovaries and alimen- 
tary organs. The adult organ in the female was composed 
of rounded polygonal cells, lying close together in a thick 
mass with ramil-icarions of tracheje running between them, 
and a fine stroma of nerve fibrils, on which the nnclei and 
granules lay. The nervous system was very large, showing an 
extraordinary individualisation of nerve power. This fatty 
1 substance had not, as far as the author knew, been shown 
before to have so much structure ; it was not the direct 
source of light, for the luminons points were a mass of 
nerves, but it was in some way connected with it, and he 
attributed the presence of uric acid and urate of ammonia, 
crystals of which were often observed in the substance, to its 
own decomposition. On the whcle, he was disposed to re- 
gard the light as a result of nerve force acting through a 
peculiar instrument made for the purpose, this fatty matter 
makin^gupas it were, by its own disintegration, for the waste 
of nervous force, while the products of this disintegration 
were oxidized and then removed, in which sense only could 
combustion be said to have anything to do with the light. 
Owing to the lateness of the hour the discussion om this 
important paper was adjourned, and the remainder of the 
evening spent in the examination of the beautiful micro- 
scopic preparations provided by Dr. Fripp. 
j WM. LANT CARPENTER, 
Honorary Reporting Secretary. 
