SEA-FISHERIES LABORATORY. ER (a: 
on was concerned, very few being shaken off. In the 
course of a week after arrival, hatching of the larve com- 
menced from the more advanced eggs, and continued 
during the next few weeks, but only in small numbers at 
atime. With one or two exceptions no larve hatched 
out in the day-time, practically all emerged at night, 
between 10 p.m. and 2 a.m. 
Each morning the larve were removed from the collect- 
ing boxes. At first they were kept in glass aquaria, where 
a constant circulation of water was maintained. After- 
wards we tried keeping them in the dark, and finally in 
the floating boxes of the Dannevig apparatus, all heht 
being carefully excluded. 
During the first few days the larve fed vigorously, and 
swam about actively. ‘Towards the end of the first week 
of their life they ceased feeding, and kept more to the 
bottom of the apparatus. ‘rom seven to ten days after 
hatching the larve commenced to moult for the first time. 
Many died at this stage, some with the skin partly shed. 
Many of the survivors failed to recover from the strain of 
- moulting a second time, and before the period of the third 
moult had arrived, all had gradually died off. The longest 
time that any lived was just over three weeks. 
Various methods were tried to keep the larve alive. 
The food, water supply, and light were varied from time 
to time, but with no effect. 
The food found most suitable was minute fragments of 
the liver of freshly-killed shore crabs. Some larve took it 
readily, clinging tenaciously to the pieces, which could be 
seen gradually passing into the stomach; while others 
refused it altogether, although it was held in front of them 
at the end of a thin piece of wood. The larve made no 
attempt to follow this food if it fell to the bottom, but 
sometimes, when walking over the fine grave], they would 
