206 THE ZOOLOGIST. 
into the crevices with great rapidity when disturbed. ‘Though 
not pelagic, their flattened legs enable them to swim very well. ‘ 
They vary in colour from a deep green with faint yellow streaks 
to a bright yellow and red. Coast of Australia, New Zealand, : 
Norfolk Island, California, and Chili. 
19. Pachygrapsus transversus (Gibb.). — Inhabits short sea- ; 
weed about midway between high- and low-tide marks. It is — 
also obtained in crevices of rocks amongst small stones, and 
amongst sessile ascidians. In appearance it is something like a 
small specimen of G. variegatus, but may be at once distinguished 
by the bristles which clothe the legs. Port Jackson. 
20. Cyclograpsus Lavauxi (M.-Kdw.). — Common round Port i 
Jackson in situations where the shore is covered with clean — 
stones—i. e. stones free from alge and mud—nearly at the limit 3 
of high tide. They are very interesting, especially in the operation — 
of disengaging them from your fingers, which is no easy matter 
if they once get a good grip. The colour is a beautiful red 
dorsally, with white on the ventral side. Port Jackson. 4 
21. Chasmagnathus levis (Dana).—Found as a rule in muddy | 
situations wherever there are stones, under which it burrows. It — 
also avails itself of the burrows made by Macrophthalmus setosus. 
Colour deep brown, dotted on the carapace with yellow. Port | 
Jackson. 
22. Sesarma erythrodactyla (Hess.).—The observer will be at 
once struck with the great disparity in coloration between the 7 | 
male and female. The female is always a dull brownish colour, _ 
while the male exhibits great variation, the carapace being some- _ 
times a brilliant green. The chele in both sexes are tipped with — 
red. Common on mud-flats under stones. Port Jackson. a 
23. Plagusia chabrus (Miers). — This species inhabits the | 
short red seaweed which clothes the rocks just below low-tide | 
mark. It is very seldom seen to leave the water of its own | 
accord, but, if it does so, returns almost immediately. It sub- | 
sists chiefly on vegetable matter (Fucus and alge), but consumes — 
animal matter whenever it is available. The outstretched limbs | 
cover an expanse of about 10in. The carapace and dorsal aspect | 
of ambulatory limbs are covered with a short dense red pubes- 
cence. Widely distributed: Port Jackson, New South Wales; | 
Tasmania, New Zealand, Cape of Good Hope, and Chili. 
a 
