GONOPLAX. 
OCyPODA. Bose. 
CANCER. Pennant . 
GONOPLAX. Leach. 
Antenna externa setacea;, graciles, el on gat se sub oculis inserts : 
interna in foveolis transversis reposita?. 
Pedipalpi gemini externi cauli interno biarticulato ; arliculo secundo quadiato ad apieem 
intcriorem truncato-subemarginato, palpigero. 
Pedum par anticum roquale, didactylurn, Maris longissimum ; Femin/e testa duplo longius ; 
digitis subdeflexis interne insequaliter dentatis ; paria alia cursoria, ordine 4, 3, 5 et 2 : 
ungues subcompressi, acuti. 
Abdomen in utroque sexu 7-articulatum. 
Testa quadrata, transversa, antice latior. 
Oculi pedunculo articulo secundo valde elongato, ad testae marginem anticum fere attingente. 
External antenna? setaceous, slender and elongate, inserted^ under the eyes; internal 
antenna; situated in transverse excavations. External double pedipalpes with the second 
joint of their internal footstalk having its anterior apex truncate-subemarginate, for the 
insertion of the palpes. Anterior pair of legs didactyle ; of the Male very long ; of the Female 
twice the length of the shell; fingers internally unequally dentated; other legs formed for 
running, in order, according to. their length, 4, 3, 5 and 2: claws sub-compressed, sharp. 
Abdomen (in both sexes) seven-jointed. Shell quadrate, transverse, broader before. Eyes with 
the second joint of their peduncles very much elongated, almost reaching to the anterior margin 
of the shell. 
Of this Genus one species only is known, the economy of which will be given in the following, 
page. 
There is another Genus allied to Gonoflax, and with it forms a stirps in one of the most 
interesting families of the brachyourous Malacostraca. 
