Suborder =BRACHYURA= (/Abdomen shorter than cephalothorax, and permanently folded under it; eyes inclosed in orbits; antennules and antennæ small/. Of these Families, the PORTUNIDÆ are called /Swimming crabs/; the OCYPODIDÆ are called /Sand- and fiddler-crabs/; and the MAIIDÆ are the so-called /Spider-crabs/.) Families Genera Species PORTUNIDÆ ^Carcinides^ ^C. mænas^ ^Callinectes^ ^C. sapidus^ ^Ovalipes^ ^O. ocellatus^ Set WALKING CRABS CANCROIDÆ ^Cancer^ ^C. irroratus^ ^C. borealis^ ^C. magister^ ^C. productus^ ^C. antennarius^ ^Menippe^ ^M. mercenaria^ ^Eupanopeus^ ^E. herbstii^ ^Eurypanopeus^ ^E. depressus^ ^Neopanopeus^ ^N. texana^ ^Rhithropanopeus^ ^R. harrisii^ GRAPSIDÆ ^Hemigrapsus^ ^H. nudus^ ^H. oregonensis^ ^Pacygrapsus^ ^P. crassipes^ OCYPODIDÆ ^Ocypoda^ ^O. arenaria^ ^Uca^ ^U. minax^ ^U. pugnax^ ^U. pugilator^ MAIIDÆ ^Libinia^ ^L. dubia^ ^L. emarginata^ ^Hyas^ ^H. coarctatus^ ^H. lyratus^ ^H. araneus^ ^Loxorhynchus^ ^L. crispatus^ ^Pugettia^ ^P. gracilis^ ^Sternorhynchus^ ^S. sagittarius^ ^Epialtus^ ^E. productus^ ^Pitho^ ^P. aculeata^ ^Lambrus^ ^L. pourtalesii^ CALAPPIDÆ ^Calappa^ ^C. flamma^ PINNOTHERIIDÆ ^Pinnotheres^ ^P. ostreum^ Order =STOMATOPODA= (/Abdomen very large; second pair of thoracic legs very large; gills borne on abdominal segments/) ^Squilla^ ^S. empusa^ Order =CUMACEA= (/Small, shrimp-like/) ^Diastylis^ ^D. quadrispinosus^