THE DECAPOD A 



315 



SUB-TRIBE 1. BRACHYRHYXCHA. 



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

 formed. 



Family CORYSTIDAE. Corystes, Latreille. Family .PORTOXIDAE. 

 Sub-Family CARCIXINAK. Carcinus, Leach (Carcinides, Ratnbun). Sub- 

 Family PORTUMNIXAE. Portumnus, Leach. Sub-Family CATOPTRINAE. 

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

 Sub-Family PORTUXIXAE. Portunus, Fabricius. Si\b-Family CAPHYRIXAE. 

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

 Sub-Family PODOPHTHALMIXAE. Podophthalmus, Lamarck. Family 

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

 Family PsEUDOTHKi.PHrsiXAi:. Pseudothelphusct, Saussure. Sub-Family 

 POTAMOXIXAE. Potamon, Savigny (= Tlielphusa, Latreille). Sub-Family 

 TRICHODACTYLIXAE. Trichoductylus, Latreille. ^Family ATELECYCODAK**- 

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

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

 cyclus, H. Milne-Edwards. ^Family CAXCRIDAE. Sub-Family CANCRINAE. 

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

 XAXTHIDAE. Sub-Family XAXTHIXAE. Xantho, Leach. Sub-Family 

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

 Milne-Edwards. Sub-Family MEXIPPIXAE. Menippe, de Haan. Sub- 

 Family OZIIXAE. Oziu* t H. Milne- Ed wards. Sub-Family ERIPHIINAE. 

 Krijihia, Latreille. Sub-Family TRAPEZIIXAE. Trapezia, Latreille. 

 -Family GOXOPLACIDAE. Sub-Family RHIZOPINAE. Rhizopu, Ptimpson. 

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

 Family GONOPLACIXAE. Gonoplox, Leach. Sub-Family CARCINOPLACIXAK. 

 Oardnoplax, H. Milne-Edwards. Sub-Family HEXAPODIXAE. Hexapus, 

 de Haan. ( Family PIXNOTHERIDAE. Sub-Family PINXOTHERIXAE. Pinno- 

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

 I'M wards and Lucas. Sub-Family XEXOPHTHALJIIXAE. Xenophthalmus, 

 White. Sub-Family ASTHENOGXATHIXAE. Asthenoynathus, Stimpson. 

 ^ Family PTENOPLACIDAK. Ptenoplax, Alcock and Anderson. Family 

 * PALICIDAE. Palicus, Pliilippi ( = Cymopolia, Roux). -^Family GRAPSIDAE. 

 Sub-Family PLAGUSIIXAE. Placjusia, Latreille. Sub-Family SESAR- 

 MIXAE. Sesarma, Say. Sub-Family GRAPSIXAE. Grapsus, Lamarck ; 

 I'lancs, Bowdich (= Nautilotjrapsus, H. Milne-Edwards). Sub-Family 

 VARIXIXAE. Varuna, H. Milne-Edwards. A Family GECARCIXIDAE. 

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

 *?Family MACROPHTHAI.MIXAK. Macrophthalmui, Latreille. Sub-Family 

 OCYPODIXAE. Ocypoda, Fabricius (Fig. 155, p. 264); Gelasimus, Latreille. 

 Sub-Family MYCTIRIXAE. Myctiris, Latreille.^ Family HAPALOCAR- 

 CEXIDAE. Hapalocarcinus, Stimpson. 



SuB-TlUBE 2. O.XYRHYXCHA. 



Body narrowed in front ; rostrum usually distinct ; orbits generally 

 incomplete. 



