THE DEC A POD A 315 



SUB-TRIBE 1. BRACHYRHINCHA. 



Body not narrowed in front ; rostrum reduced or wanting ; orbite well 

 formed. 



Family CORYSTIDAE. Corystes, Latreille. Family PORTUNIDAE. 

 Sub-Family CARCININAE. Carcinu*, Leach (Carcinides, Rathbun). Sub- 

 Family PORTUMNINAE. Portumnus, Leach. Sub-Family CATOPTRINAJC. 

 Catoptrus, A. Milne-Edwards. Sub-Family CARUPINAE. Carupa, Dana. 

 Sub-Family PORTUNINAE. Portunus, Fabricius. Sub- Family CAPHYRINAE. 

 Caphyra, Guerin. Sub-Family THALAMITINAE. Thalamita, Latreille. 

 Sub-Family PODOPHTBALMINAE. Podophthalmiu, Lamarck. Family 

 POTAMONIDAE. Sub-Family DECKENIINAE. Deckenia, Hilgendorf. Sub- 

 Family PSEUDOTHKLPHUSINAE. Pseudotlielphusa, Saussure. Sub-Family 

 POTAMONINAE. Potamon, Savigny ( = Thelphusa, Latreille). Sub-Family 

 TRICHODACTYLINAE. Trichodactylus, Latreille. Family ATELECYCLIDAE. 

 Sub-Family ACANTHOCYCLINAE. Acanthocyclus, Milne-Edwards and Lucas. 

 Sub-Family THIIXAE. Thia, Leach. Sub-Family ATELECYCLINAE. Atele- 

 cyclus, H. Milne-Edwards. Family CANCRIDAE. Sub-Family CANCRINAE. 

 Cancer, Linnaeus. Sub-Family PIRIMELINAE. Pirimela, Leach. Family 

 XANTHIDAE. Sub-Family XANTHINAE. Xantho, Leach. Sub-Family 

 CARPILIINAE. Carpilius, Leach. Sub-Family ETISINAE. Etisus, H. 

 Milne-Edwards. Sub-Fan) ily MENIPPINAE. Menippe, de Haan. Sub- 

 Family OZIINAE. Ozius, H. Milne- Ed wards. Sub-Family ERIPHIINAE. 

 Eriphia, Latreille. Sub-Family TRAPEZIINAE. Trapezia, Latreille. 

 Family GONOPLACIDAE. Sub-Family RHIZOPINAE. Rhizopa, Stimpson. 

 Sub-Family PRIONOPLACTNAE. Prionoplax, H. Milne-Edwards. Sub- 

 Family GONOPLACINAE. Gonoplox, Leach. Sub-Family CARCINOPLACINAE. 

 Carcinoplax, H. Milne-Edwards. Sub-Family HEXAPODINAE. Hexapus, 

 de Haan. Family PINNOTHERIDAE. Sub-Family PINNOTHERINAE. Pinno- 

 theres, Latreille. Sub-Family PINNOTHERELIINAE. Pinnotherelia, Milne- 

 Edwards and Lucas. Sub-Family XENOPHTHALMINAE. Xenophihalmus, 

 White. Sub-Family ASTHENOGNATHINAE. AstJienognathus, Stimpson. 

 Family PTENOPLACIDAE. Ptenoplax, Alcock and Anderson. Family 

 PALICIDAE. Palicus, Philippi (=Cymopolia, Roux). Family GRAPSIDAE. 

 Sub-Family PLAGUSIINAE. Playusia, Latreille. Sub-Family SESAR- 

 MINAE. Sesarma, Say. Sub-Family GRAPSINAE. Grapsus, Lamarck ; 

 Planes, Bowdich ( = Nautilograpsus, H. Milne-Edwards). Sub-Family 

 VARUNINAE. Varuna, H. Milne -Ed wards. Family GECARCINIDAE. 

 Gecarcinus, Leach ; Cardisoma, Latreille. Family OCYPODIDAE. Sub- 

 Family MACROPHTHALMINAE. Macropktlialmus, Latreille. Sub-Family 

 OCYPODIXAE. Ocypoda, Fabricius (Fig. 155, p. 264); Gelasim-ns, Latreille. 

 Sub-Family MYCTIRINAE. Mydiris, Latreille. Family HAPALOCAR- 

 CINIDAE. Hapalocarcinus, Stimpson. 



SOB-TRIBE 2. OXYRHYNCHA. 



Body narrowed in front ; rostrum usually distinct ; orbite generally 

 incomplete. 



