THE DECAPOD A 313 



Section 3. Ano.mdra. 



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

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

 fused with epistonie ; exopodites of maxillipeds with flagella, when 

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

 pendix interna sometimes j^resent ; uropods rarely absent ; exopodites 

 sometimes segmented ; bi-anchiae few. 



Tribk 1. Galatheidea. 



Abdomen bent upon itself, symmetrical ; body depressed ; rostrum 

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



Family Aegleidae. Aeglea, Leach. Family Uroptychidae. Urop- 

 tychus, Hendeison ; Chirostylm, Ortmanii. Family Galatheidae. Sub- 

 Family Galatheinae. Galathea, Fabricius ; Mimida, Leach (Fig. 150, 

 ]). 260). Sub-Family Munidopsinae. Mimidopsis, Whiteaves. Family 

 Porcellanidae. Porcellana, Leach ; FetrolistJies, 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. Axius, Leach (including Eiconaxius, Spence Bate, 

 and /co«a.aop.sis, Alcock (Fig. 149, p. 260), as subgenera) ; Calocaris, Bell. 

 Family Laomediidae. Laomedia, de Haan ; Jao:ea, Nardo. Family 

 Callianassidae. Sub-Family Callianassinae. CaUianassa, Leach ; 

 Callicmidea, H. Milne-Edwards. Sub-Family L^pogebiinae. 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- 

 tin not typical, uropods (when ]U'esent) adapted for holding the body 

 into hollow objects. 



Family Pylocheltdae. rylochelcs, A. Milne-Edwards (Fig. 151, 

 ]). 261). Family Paguridae. Sub-Family Pagurixae. Pagiirus, 

 Fabricius ; Glibanarius, Dana. Sub-Family Eupagurinae. Eupag'urus, 

 Brandt; Spiropagurus, Stinqjson ; Parapagurtis, S. I. Smith (Fig. 183, 

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

 (Fig. 152, p. 262). Family Lithodida^. Sub-Family Lithodinae. 

 Lithodes, Latreille ; Neolithodes, Milne-Edwards and Bouvier (Fig. 153, 

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



Tribe 4. Hippidea. 



Abdomen bent under thorax, .symmetrical ; rostrum suiail or absent ; 

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



