22 
GENERIC CHARACTER. 
Feet commonly eight (in fome fpecies fix or ten), befides 
two chelz. 
Pa/pi or feelers fix, unequal. 
Eyes two, diftant, in moft fpecies footftalked; elongated, 
moveable. 
Mandible thick. 
Lip triple. 
Tail articulated, unarmed. 
SPECIFIC CHARACTER. 
Elongated Cancer with ferrated chele, and tail muricated 
on each fide by a triple row of fharp protuberances. 
THIS curious animal is about the fize of the common 
lobfter. The antennz, as in that fpecies, are {mooth and 
fetaceous. The four fmaller ones (which are united at 
the bafe) are about an inch and half long. The thorax 
is {mooth on the upper part, but on the ridge of the fides 
is very {trongly muricated with moderately diftant and 
extremely ftout f{pines, fome of which are fo fhort and 
obtufe as to be rather tubercles than fpines. 
