of the Fishery Board for Scotland. 67 
The lobsters, immediately after being hatched, swam actively about, 
chasing copepoda and any small white particles moving in the water. 
The two species of copepods most common in the water were determined 
by Dr. Scott. A red copepod was Z'emera longicornis ; a white one was 
Eurytemera affinis. They were both small. 
During the zoéa stages, when the lobster is wholly pelagic, that is to 
say before the pereiopods function as walking legs, a period of, roughly, 
three weeks, it swims with its body bent in a quadrant shape, having the 
head and thorax lying horizontal, or inclined slightly downwards, and the 
abdomen and tail directed downwards, If it spies a copepod beneath it 
swims directly down for it in a circling, sort of corkscrew path, and 
follows up its prospective victim, when it escapes with a smart dart off 
for a distance of an inch or two. The pursuit may last for a little time, 
and now and then the lobster catches and devours the copepod. When 
the copepods are swimming above them they also detect them and swim 
directly for them. They also notice them when in front of them and on 
the same level. The copepods are to be seen on the side of the box, and 
the young lobsters go poking about the side after them. 
The larval lobster, when undisturbed, swims forward at a uniform 
speed by means of the exopodites of the pereiopods, turning sharply to this 
side or to that to seize any object that attracts its attention, and which it 
will pursue till it loses sight of it or has its attention distracted by another 
form. When surprised it jerks backward by means of its abdomen and 
telson, 
The young lobsters were usually close to the surface of the water. No 
food was provided regularly for them, except what was brought in with 
the water supply. On a few occasions a little of the liver of the crab 
(Cancer pagurus) was supplied them, They pursued the little white 
portions as they fell through the water, usually catching them before they 
reached the bottom. They ate up the live zoée of Cancer pagurus when 
these were poured into the box. 
While the lobster in the zoéa stages no doubt eats dead organisms, as 
Cunningham relates, it is much more active in the pursuit of living 
animals, It follows, from the fact of its pelagic existence, that it must 
feed on living forms. 
The lobsters were kept for varying periods. When set free they were 
mostly in the second and third stages ; some were in the first stage. A 
few were reared to the megalops stage on the food in the water supply. 
The total number set free was about 3000. They were distributed as 
follows :— 
August 6, 1902.—1000 larvee set free a little over 1 mile north of 
Fraserburgh. 
August 7, 1902,—1000 larvee set free about 3 mile off Cairnbulg 
August 19, 1902.—1000 larve set free about 3 mile off St. Comts. 
The fry were conveyed in large glass (sulphuric acid) carboys by rail 
to Fraserburgh. All the lobster fry (1000) were on each occasion stowed 
in one carboy. The number of fry in the first consignment was counted, 
and from that datum the numbers in the subsequent lots were deduced. 
No special cooling preparations were found to be necessary for the 
journey. Experiments were made to test the effect of a possible rise in 
the temperature of the water during the transportation. ‘The temperature 
of the sea-water in the hatchery was 12°5° C. A few lobster fry were 
put into a jar containing half-a-gallon (= 2 litre) of water. The jar 
was heated slowly until the water reached a temperature of 20° C; i¢ 
was then allowed to cool. Next day the lobsters were, with two 
exceptions, all lively ; two had succumbed. 
