3 i4 THE CRUSTACEA 



Family ALBUNEIDAE. Albuma, Fabricius. Family HIPPIDAE. 

 Hippa, Fabricius ; Remipes, Latreille. 



SECTION 4. BRACHYURA. 



Abdomen small, symmetrical, bent under thorax, tail-fan not 

 developed ; carapace fused with epistome at sides and nearly always in 

 the middle ; exopodites of maxillipeds with flagella, when present, bent 

 inwards ; first legs always, third legs never, chelate ; no appendix interna 

 on pleopods ; uropods rarely present, never biramous ; branchiae gener- 

 ally few. 



TRIBE 1. DROMIACEA. 



Last pair of legs modified, dorsal in position ; female openings on 

 coxopodites ; first pleopods present in female ; branchiae sometimes 

 numerous ; mouth-frame quadrate. 



SOB-TRIBE 1. DPOMIIDEA. 



Sternum of female with longitudinal grooves ; vestiges of uropods 

 usually present ; branchiae 14-20 on each side ; eyes completely sheltered 

 by orbits ; no linea homolica on carapace. 



Family HOMOLODROMIIDAE. Homolodromia, A. Milne -Ed wards. 

 Family DROMIIDAE. Dromia, Fabricius. Family DYNOMENIDAE. 

 Dynomene, Latreille. 



SUB-TRIBE 2. HOMOLIDEA. 



Sternum of female without longitudinal grooves ; no uropods ; 

 branchiae 8-14 on each side ; eyes not completely sheltered by orbits ; 

 linea homolica usually present on carapace. 



Family HOMOLIDAE. Homola, Leach. Family LATREILLIIDAE. 

 Latreillia, Roux. 



TRIBE 2. OXYSTOMATA. 



Last pair of legs normal or modified ; female openings generally on 

 sternum ; first pleopods wanting in female ; branchiae few ; mouth-frame 

 triangular, produced forwards over epistome. 



Family DORIPPIDAE. Dorippe, Fabricius ; Ethusa, Roux ; Cydodorippe, 

 A. Milne-Edwards. Family RANINIDAE. Ranina, Lamarck. Family 

 CALAPPIDAE. Sub-Family CALAFFINAE. Calappa, Fabricius. Sub- 

 Family ORITHYINAE. Orithya, Fabricius. Sub-Family MATUTINAE. 

 Matuta, Fabricius. Family LEUCOSIIDAE. Sub-Family LEUCOSIINAE. 

 Leucosia, Fabricius ; Ebalia, Leach. Sub-Family ILIINAE. Ilia, Leach. 



TRIBE 3. BRACHYGNATHA. 



Last pair of legs normal, rarely reduced or dorsal in position ; female 

 openings on sternum ; first pleopods wanting in female ; branchiae few ; 

 mouth-frame quadrate. 



