146 MISS MARION I. NEWBIGIN. 
their true habitat being in deep water, but now and again 
the ring-horned prawn (Pandalus annulicornis) does occur 
in shore pools. It is a most beautiful creature, with 
a translucent body flecked and marked with bright crimson, 
and with long feelers ringed with the same tint. Watch 
it or any of its allies in a clear pool, and you will see 
that its usual method of locomotion is by leisurely 
swimming. On an alarm it can dart backwards swiftly 
enough by a sudden flexion of the tail, but the legs are 
too slender to make walking on the bottom easy. It is 
a true swimmer, adapted for deep water and not for the 
bottom. Occasionally among the rocks, far out, one 
encounters another equally esteemed crustacean — the 
common lobster. It is much shyer than the prawns, 
and prefers to hide in rock crevices with merely the great 
claws exposed, rather than to come out in the open, but 
there is no difficulty in seeing that it is essentially a 
creeping and not a swimming form. On an alarm it 
darts backwards, like the prawn, with extraordinary 
swiftness, but when undisturbed it prefers walking to 
any other method of locomotion, The lobster and the 
prawn are relatively rare shore animals, but the next 
form, the beautiful little Galathea, is exceedingly common. 
Common as it is, however, it is not very often seen, and 
is not easy to catch, for it is a past master in the art of 
playing ‘puss-in-the-corner” You may satisfy yourself 
that a pool contains several specimens, and may succeed 
in locating a particular specimen in a dark corner. But 
while you are meditating your plan of campaign, there is 
a sudden flash, and the Galathea is derisively twiddling his 
whiskers at you from another more inaccessible corner. 
Even if you make a lucky grab, and seize him by his great 
claw, he is not a whit disconcerted, but forthwith shakes 
off the claw and departs. If by patience and perseverance 
you ultimately outwit him, and transfer him safe and 
sound to your collecting bottle, you find that he is not 
unlike a little lobster, the chief difference being that the 
tail is kept permanently bent. Locomotion is chiefly 
by walking, but the tail is used as a swimming organ 
in the sudden darts across the pool. In several respects 
