REPORT ON THE BRACHYURA. 
xiii 
Family II. P o R t u n i d je. 
Portunidse et Platyonychidse, Dana. 
Portuniens, Milne Edwards and A. Milne Edwards. 
Section I. Portuninse. 
Portuniens normaux, A. Milne Edwards. 
Challenger Genera 
Neptunus, de Haan (subgenera Ampliitrite , de 
Haan ■ Achelous, de Haan ; Hellenus, A. 
Milne Edwards). 
Xiphonedes , A. Milne Edwards. 
Scylla , de Haan. 
Cronius, Stimpson. 
Goniosoma, A. Milne Edwards. 
Thalamonyx, A. Milne Edwards. 
Thalamita, Latreille. 
Lupocyclus, Adams and White (subgenus Para- 
thranites, nov.). 
Platyonychus, Latreille (pt.). 
Portunus, Fabricius. 
Lissocarcinus, Adams and White. 
Section II. Podophthalminse. 
Portuniens anormaux, A. Milne Edwards. 
Challenger Genus — 
Podoplitlialmus, Lamarck. 
Legion II. CYCLINEA, Dana. 
Challenger Genus — 
Acantliocydus, Milne Edwards and Lucas. 
Legion III. CORYSTOIDEA. 
Corystoidea , Dana. 
Corystiens, Milne Edwards. 
Challenger Genera — 
H ypopeltarium, nov. ( = Peltarion, Jacquinot 
and Lucas). 
Gomeza, Gray. 
Legion IV. THELPHUSINEA. 
Tlielphusiens, Milne Edwards. 
Challenger Genus — 
Thelphusa, Latreille (subgenera Potamonautes, MacLeay; Geothelphusa, Stimpson). 
