LiEMODIPODA. 
213 
rows divaricating at a rather wide angle. From the sudden 
clutchings of these organs I have no doubt that they too 
are seizing prey ; and very effective implements they must 
be, for the joints bend down towards each other, and the 
long rows of spines interlacing must form a secure prison, 
like a wire-cage, out of which the jaws probably take the 
victim, when the bending in of the antennae has delivered 
it to the mouth. But these well- furnished animals are 
not satisfied with fishing merely at one station ; they climb 
nimbly and eagerly to and fro, insinuating themselves 
among the branches, and dragging themselves hither and 
thither, by the twigs, on a straight surface. When march- 
ing (the motion is too free and rapid to call it crawling) 
along the stem of a zoophyte, the creature proceeds by 
leaps, catching hold with the fore limbs, and then bringing 
up the hinder ones close, the intermediate segments of the 
thin body forming an arch, exactly as the caterpillars of 
the geometric moths do. But the action of the Crustacean 
is much more energetic than that of the caterpillar. In- 
deed, all its motions strike one as peculiarly full of vigour 
and energy. I have seen the large red species swim, throw- 
ing its body into a double curve like the letter S, with the 
head bent down, and the hind limbs turned back, the body 
