CRTTSTACEA. 
57 
fselers, and eyes separately on footstalks or sessile. Tlie month, 
formed by the adaptation of several pairs of appendages varying 
in separate orders to assist in manducation. The legs with several 
joints, some of the higher groups being variated into prehensile 
S'Ppendages. Vent at the extremity of the animal.” 
“The stalk-eyes Crustaceans possess a carapace or shelly crust 
nbove the thorax or Pereion, within which the principal organs 
*^f life are protected, the branchiae or gills for breathing are not 
iiranched ; five posterior pairs of appendages belonging to the 
thorax or Pereion only formed for walking. 
“They are arranged by Dr. Milne Edwards in his Histoire 
hes Crustaoes, 1830, into three great sections, of which the separate 
•characters are” 
PBbachtijea or short-tailed Crabs, having the pleon or abdo- 
pien, vulgarly called the tail, slightly developed, having none of 
hs appendages adapted for swimming ann destitute of fan-like 
•caudal plates,” or uropoda. 
“Aiq-OMOTOA, abdomen or pleon well developed, with a portion 
^ent under the thorax or pereion, with terminal caudal plates” 
uropoda. 
“Macuouea, abdomen or pleon well developed and extended, 
having paddles (pleopoda) beneath and terminal fan shaped 
’^opoda or caudal plates.” 
The Order of the Brachyura is again divided into the following 
f^^ttiiliesj Oxyrhynchiice, Macropodidce, Maiada, Parthenopidm, Can- 
'^^'ridm, Portunidce, Pinnotheridm, Grapsidce, Leucodadce, 
MACUOPOPIBM. (Sea Spiders.) 
Genus Stenoruynchus. — Lam. 
“ Second pair of legs much longer than others ; the stalk 
the external antennse inserted before the level of the eyes, 
ivhich the footstalk is very short.” 
^tenorhynchus Tenuirostris — Leach — Smaller Sea Spider. 
,, Longirortus — Couch’s CornishFauna 
‘Common at the depth from two to twenty fathoms, often taken 
in crab-pots.” 
Stenorhynchus Pualangium — Pennant — Long-legged Spider 
Crab. “Common at the mouth of rivers — Leach ; off the south 
coast of Cornwall. Bell, C.S.B. 
