THE DEC A POD A 313 



SECTION 3. ANOMDRA. 



Abdomen rarely as in Palinura, generally soft, or bent upon itself, 

 pleura generally small or absent, tail-fan often reduced ; carapace not 

 fused with epistome ; exopodites of maxillipeds with flagella, when 

 present, bent inwards ; third legs unlike the first, never chelate ; ap- 

 pendix interna sometimes present ; uropods rarely absent ; exopodites 

 sometimes segmented ; branchiae few. 



TRIBE 1. GALATHEIDEA. 



Abdomen bent upon itself, symmetrical; body depressed; rostrum 

 often well developed ; first legs chelate ; tail-fan well developed. 



Family AEGLEIDAE. Aeylea, Leach. Family UROPTYCHIDAE. Urop- 

 tyclius, Henderson ; Chirostylus, Ortmann. Family GALATHEIDAE. Sub- 

 Family GALATHEINAE. Galathea, Fabricius; Munida, Leach (Fig. 150, 

 ]>. 260). Sub-Family MUNIDOPSINAE. Munidopsis, Whiteaves. Family 

 PORCELLANIDAE. Porcellana, Leach ; Petrolisthe.^ Stimpson. 



TRIBE 2. THALASSINIDEA. 



Abdomen extended, symmetrical ; body compressed ; rostrum some- 

 times well developed ; first legs chelate, rarely sub-chelate ; tail-fan well 

 developed. 



Family AXIIDAE. Axiux, Leach (including Eiconaxius, Spence Bate, 

 and Iconaxiopsis, Alcock (Fig. 149, p. 26*0), as subgenera) ; Calocaris, Bell. 

 Family LAOMEDIIDAE. Laomedia, de Haan ; Jaxea, Nardo. Family 

 CALLIANASSIDAE. Sub-Family CALLIANASSINAE. Callianassa, Leach ; 

 Callianidea, H. Milne-Edwards. Sub-Family UPOGEBIINAE. Upogebia, 

 Leach ( = Gebia, Leach). Family THALASSINIDAE. Thalassina, Latreille. 



TRIBE 3. PAGURIDEA. 



Abdomen nearly always asymmetrical, either soft and twisted or bent 

 under thorax ; rostrum generally small or absent ; first legs chelate ; tail- 

 fan not typical, uropods (when present) adapted for holding the body 

 into hollow objects. 



Family PTLOCHELIDAE. Pylocheles, A. Milne-Edwards (Fig. 151, 

 p. 261). Family PAGURIDAE. Sub-Family PAGURINAE. Pagurus, 

 Fabricius ; Clibanarius, Dana. Sub-Family EUPAGURINAE. Eupagurus, 

 Brandt; tipiropagurus, Stimpson; Parapagurus, S. I. Smith (Fig. 183, 

 p. 306). Family COEXOBITIDAE. Coenobita, Latreille; Birgus, Leach 

 (Fig. 152, p. 262). Family LITHODIDAE. Sub-Family LITHODINAE. 

 Li tit odes, Latreille ; Neolithodes, Milne-Edwards and Bouvier (Fig. 153, 

 p. 262). Sub-Family HAPALOGASTRINAE. Hapalogaster, Brandt 



TRIBE 4. HIPPIDEA. 



Abdomen bent under thorax, symmetrical ; rostrum small or absent ; 

 first legs styliform or sub-chelate ; tail-fan not adapted for swimming. 



