570 4HE WOOLLOUSE. 
the Sessile-eyed Crustacea, because their eyes, instead of being pla-ed on 
footstalks, are seated directlyupon the shell. The bo ‘v is divided w.th tolerable 
distinctness into three parts, for which the ordinary tides of head, thorax. and 
abdomen are retained as being more ccn-enient and intelligible than the 
ingenious and more correct, though rather repulsive, titles that have lately 
been affixed to these divisions of the body. 
They have no carapace, like the stalk-ey2d crustaceans, nor do they breathe 
with gills, butby means of a curious adaptation of so. e of their limos. None 
of the Sessile-eyed Crustacea attain any large size, an inch and a half being 
nearly their utmost limit ia point of length. Most of these animals reside 
along the sea-shores, where they are of very great use in clearing away the 
mass of dead animal and vegetable matter which is constantly found in the sea. 
In the illustration we have an example of the frst family, calles by the name 
of Orchestidz, or Jumpers, bec suse they possess the power of leaping upon 
dry ground. The ngure represents the most familiar of these little crusta- 
ceans. ‘This is the littl SaND-HOPPER, or SANJ'-SKIPPER, which is seen in 
such myriads along all our sandy shores, leaping about vigorously just 
before the advancing or behind the retiring tide, and looking 1.ke a low mist 
edging the sea, so coun'less are their numbers. Paley has a well-known 
passage respecting this phenomenon, too familiar for quotation. 
The leap of the Sand-hopper is produced by bending the body and then 
flinginz it open with a sudden jerk—in fact, the exact converse of the mode 
of progression adopted by the lobster ancl shrimp. The Sand-hopper feeds 
on almost everything that is soft and capable of decay, and seenis to care] ttle 
whether the food be of an animal or vegetable nature. Decaying seaweed 
is a favourite article of food, and wherever a b inc. of blackened and rotting 
seaweed lies on the sand, there may be found the Sand-hoppers congregated 
beneath it, and literally boiling out when the seaweed is plucked up. 
: The teeth of this creature are 
strong and sharp, as indeed is 
nedful for the tasks imposed 
upon them. The Sand-hopper 
will eat anything ; and on oneoc- 
casion, when a Jady had allowed 
a swarm of these little crusta- 
ceans to sett e on her handker- 
chief, it was bitten to rags when 
she took it up. It is very fond 
of worms, will eat any kind of 
carrion, and sometimes, when 
pressed: by hunger, has no 
scruple in eating its own kind. 
THE two lower figures in the 
illustration represe.t the com- 
mon WOODLUUSE, the iatter 
figure being given in order to 
show the equal development of 
the legs. This creature is very 
plentiful in all damp places, and 
ARMADILLO WooDLOUSE. —(Armadil/o vulgaris. especially exults in getting un- 
WOODLOUSE. —(Porectliv scab.) der logs of wood or decaying 
timter. In cellars and outnouses 
they are common, and are generally to be found in daik and damp localities, 
Fowls are very fend of them, and there is no surer way of extirpating these 
sharp-toothed creatures than by allowing some fowls to scrape and peck 
