MALACOSTRACA

malacostraca, the annectent group leptostraca being included in the former. it may be useful to give here a synopsis of the classification adopted in this encyclopaedia, noting that, for convenience of treatment, it has been thought necessary to adopt a grouping not always expressive of the most recent views of affinity. class _crustacea_. sub-class _entomostraca_. order _branchiopoda_. sub-orders _phyllopoda_. _cladocera_. _branchiura_. orders _ostracoda_. _copepoda_. sub-classses _thyrostraca_ (_cirripedia_). _leptostraca_. _malacostraca_. order _decapoda_. sub-orders _brachyura_. _macrura_. orders _schizopoda_ (including _anaspides_). _stomatopoda_. _sympoda_ (cumacea). _isopoda_ (including _tanaidacea_). _amphipoda_. (w. t. ca.)