2 
Anomura 
Galatheidea 
Paguridea ... 
Hippidea (vacant). 
Macrura 
Nephropsidea 
Eryonidea ... 
Loricata 
Thalassinidea 
Caridea 
Penaeidea ... 
Stenopidea (vacant). 
Euphausiacea... 
Mysidacea ..♦ 
Syncarida 
Stomatopoda 
Cumacea 
Tanaidacea ... 
Isopoda 
Asellota... 
Phreatoicidea (vacant). 
Flabellifera 
Valvifera 
Epicaridea 
Oniscoidea 
Amphipoda ... 
Gammaridea 
Hyperiidea 
Caprellidea 
Phyllocarida 
Branchiopoda 
Phyllopoda .;. 
Cladocera 
Copepoda 
Branch iura ... 
Ostracoda 
Oirripedia 
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