COPEPODA 



109 (120) Anal plate without spines, or sjiines are simple-, i.e.. .lu n..i n.i%.- 



two points 



no 



110(113) Sides of last abdominal segment Ikivc spine-like prolonRalioii 

 caudad 



Ill (112) Spines of anal plate few in number, noi cAcccning iivt- or s.x. 



Cantliocamptiis slaphylitwidfs iVar^t- I.X)^. 



^Ifc 



Fig. 1231. Anal plate and furta <>( i anthomrnpiw ;.. 

 (Aftir I'l-arsc 1 



112 (ill) Spines of anal plate numerous. 



Cant/ii),(inif)ti(s st<ipliyliuus (Jurinc) i8ao. 



Fig. 1232. Last segment and furcai-of maXc Cantkuamptui tUipkyitmmt 

 (After Schmcil.j 



113 (no) Sides of last abdominal segment do not have spine-like i>rolonpntion 



caudad ; 



114 (115) Furca long and slender, nearly four times as long .i.s uidc. 



Canthocamplus idahocnsis Marsh igoj. 



Fig. 1233. Furcaeof female rdw/A"r<Jwi/)/Mi I /.Jf.<'t>i< X 1 .-a 



115 (114) Furca short, its length not exceeding twice its width ... 116 



116(119) Furca with two setae '" 



117 (118) Anal plate with spines. . Canthocamptus illinoisnisis ForU 



118(117) Anal plate without spines. . Canthocamptus hicmalis PcarM.- i .>05. 



/ 



Fig 1-34. AmJ plate of female Tjn/AiVdw^tej Ai**»«/u. >< 144- 

 >^ ■ (After I'can*e.) 



