166 Thirty-fourth Annual Meeting. 
The presence of a growth of diatoms and other organisms 
on the fry is another serious difficulty. The amount of this 
growth varies with different seasons. !t can be partially over- 
come by proper shading of the bags. A warm temperature, clean 
water, proper aeration and circulation of water, proper food 
will so hasten development that trouble from this parasite growth 
will be largely eliminated. 
There are many other problems connected with the latter 
stages of the lobster which are of great importance, both econ- 
omic and scientific. ‘The Rhode Island Commission has under- 
taken the solution of some of these. The habits and require- 
ments of the young lobsters which have passed through the 
earlicr stages, the rate of growth and age of lobsters up to the 
marketable size, the migration of adult lobsters along the 
shores and to and from waters of adjoining states, their mi- 
erations to and from deep water, the rate of growth of large 
lobsters, the extreme age to which lobsters may live and breed, 
the rate of moulting of the old and young lobsters, questions 
connected with the loss of claws or appendages and the relation 
of the growth of new claws or appendages to growth and moult- 
ing. 
But these are problems for the future. It is sufficient for 
us at present that we have worked out a method of lobster 
rearing which enables us to hatch and rear lobsters on a large 
scale, is comparatively cheap, at least cheap enough to be prac- 
tical, is capable of indefinite expansion and which will enable 
us each summer to rear a large number of lobsters to a stage 
where they will, when liberated grow into large lobsters in suf- 
ficient numbers to restock the waters of the state. 
DISCUSSION. 
During the reading of the paper by Dr. Mead, Dr. Gorham 
said : 
Forty-eight per cent. of survival of lobster fray is about all 
that can be expected. 
About half the young lobsters consume: each other. With 
better food, however, the percentage of survival may be in- 
creased, 
In the side and bottom of the box are wire screens to allow 
