LOBSTERS 263 
The female lobster carries her eggs on the abdominal legs, to which 
they are glued by a kind of cement. After the young emerge from the 
egg, the zoée still cling to the mother for a little time. The lobster 
moults eight times the first year, five times the second, and three times 
the third year, after which the male moults twice and the female once a 
year. It retires to some secluded spot for this operation, which is at- 
tended with many dangers. The back splits open longitudinally and 
the animal slowly withdraws, leaving the shell complete. In preparation 
for moulting, the lime around the 
contracted joints of the chele is 
absorbed, so that the soft flesh can 
pass through. Any injury to a 
limb at the time of moulting, or 
which results from fighting or 
from any accident, is repaired at 
successive moultings, and a lost 
member is replaced by a new, but 
not always a perfect, one. 
Genus Panulirus 
P. interruptus. This is the 
California spiny lobster, rock- Me 
lobster, or salt-water crawfish. It | ae 
differs from the common lobster 
Homarus of the Atlantic coast in 
having no large claws, the first 
pair of feet being simple like the 
rest, also in having antenne which 
are enormously long and very 
large at the base. The carapace 
is beset with spines, and the lateral 
margins of the abdominal segments end in spines. This species lives 
among the rocks on the southern California coast. 
P. argus or americanus resembles P. interruptus, and is found on 
the coast of Florida. 
Panulirus interruptus, the spiny or rock-lobster. 
Genus Scyllarus 
Scyllarus has a broad, almost square carapace, which is uneven 
and coarsely granulated; the anterior corners are sharp, the 
posterior ones rounded. The antenne are curiously modified 
into broad, fiat, double plates reaching quite across the straight 
anterior end of the carapace. The under scales of these modified 
antenne are rounded and leaf-like, the upper ones are pointed. 
The margins of the abdominal plates on the ventral side are 
toothed, and on the upper side the first three sections have 
