IDOTEA. 
223 
drawing them through its anterior fringed feet for the pur- 
pose of cleaning them. It frequently darts from its branch, 
with the rapidity of lightning, to seize with its long an- 
tennae some minute crustaceous animal, and returns to its 
resting-place to devour its prey at leisure/” 
Gen. 108. IDOTEA. 
All the legs ending in a pointed claw, and so adapted for 
walking ; abdomen furnished beneath with two large simple 
plates, which do not extend beyond the side of the terminal 
segment. Body considerably elongated, and not much di- 
lated about the middle. The various species are found 
amongst seaweeds near the shore. 
Idotea pelagic a. — Eront slightly notched ; second joint 
of abdomen with a smajl keel down the middle, rounded at 
the end, and with a blunt tooth in the middle; antennse one- 
third the length of the body. 
Bound at different parts of the coast. Common on the 
Bell Bock. 
Idotea tpicuspidata. Three-toothed Idotea . (Plate XII. 
fig. 2.) — Body elongated, nearly linear. Cinereous, dotted 
with brown ; the back marked with a yellowish-white Ion- 
