(576) 



The classification of Crustacea here adopted, without laying any 

 claim to innality or perfection, is based on considerations of general 

 convenience. It may be tabulated as follows : — 



PAGE 



MALACOSTEACA 283 



Beachyura 283 



Brachyura genuina 283 



Brachyura anomala 341 



Macruea 349 



Macrura anomala 349 



Macrura genuina 366 



schizopoda 395 



Stomatopoda 404 



Sympoda 409 



Isopoda 418 



Isopoda anomala 418 



Isopoda genuina 419 



Amphipoda 447 



PAGE 



ENTOMOSTRACA 481 



Beanchiopoda 481 



Phyllopoda 481 



Cladocera 489 



OSTEAPODA 495 



COPEPODA 518 



THYEOSTEACA 563 



Thoeacica 563 



Pedunculata 563 



Operculata 567 



ACEOTHOEACICA 575 



These principal sections and subsections are subdivided into 

 numerous tribes. Of these the two, Thysanopodacea and Mysidacea, 

 comprised in the Schizopoda, are set apart by recent authorities, as 

 each possessing rank equivalent to that of the parent group. In 

 the same way the Isopoda anomala or Apseudacea are sometimes 

 withdrawn altogether from the Isopoda and given independent 

 rank. 



