AN-ATOMT OF TE^ LoMmU, 83 
pace is afterwards scooped out through a large opening or 
passage on each side of the head, by a membranous ap- 
pendage of the leg, called the gill-paddle^' {flabellum, 
Fig. 99). 
The digestive system consists of a mouth, ojiening between 
the mandibles, an oesophagus, a large, membranous stom- 
ach, with A'cry large teeth for crushing the food wilhin the 
large or cardiac portion, wliile the posterior or pyloric cud 
forms a strainer through which the food presses into the 
long, straight intestine, which ends in the telson. The 
liver is very large, dark 
green, with two ducts emp- 
tying on each side into the 
junction of the stomach 
with the intestine. 
The nervous system con- 
sists of a brain situated di- 
rectly under the base of the 
rostrum (supraoesophageal 
ganglion), from which a 
pair of optic nerves go to 
the two eyes, and a pair to 
each of the four antennae. 
The mouth-parts are sup- 
FiG. 98, — Z), second maxillipede; eir, exo- t i 'ji <» /i 
podite; end, endopodite; flah, epipodite plied With UCrVCS irom the 
or flabellum, or scaptogathnite. infraoesophagcal ganglion, 
which, with the rest of the nervous system, lies in a lower 
plane than the brain. There are behind these two ganglia 
eleven others; the cephalo-thoracic portion of the cord is 
protected above by a framework of solid processes, which 
forms, as it were, a false-bottom'' to the cephalo-thorax; 
this has to be carefully removed before the nervous cord 
can be laid bare. A sympathetic nerve arises on each 
side of the oesophagus and distributes branches to the 
stomach. 
The nerves of special sense are the optic and auditory 
nerves. The eyes are compound, namely, composed of 
flaJS 
C3Cp 
