COPEPODA 



773 



70 (67) First segment of right exopoditc of male fifth foot has hx-alinc 

 appendage , 



71 (72) 



Hyahne appendage of first segment of exojxxlite of male fi/lh fool 

 at mner distal angle, endopKxlite of right foot about equals 

 first segment of exopodite. 



Diaptomus signimmia Lilljclxjrg iMH<). 



Fig. i20g. Diaptomus signicauda. /I, abdomen 

 of female. X 118. B, fifth feet of male. 

 X 174- (Original.) 



The first segment of ihc abdcimcn ol 

 the female ha.s a difo'tifurm pr««'-^» •■" 

 the ri^ht posterior border K'- 

 mountain regions of wrMrrn ' 

 States. It reprf>tnt 

 that are f()un<l in tli' 

 of the western p;irl 1.; 

 The peculiar apjK-ml,; 

 ment of the fcmali- 

 the name to the s|k-. .t ^ ,. 

 teristic of the Kroup. lOli' 

 Rocky Mountains and far' 

 likely to contain this or all' 



Length of female, o •, 



Length of m.ilc our. 



72 (71) Hyaline appendage of first segment of exopodite of male fifth fo»il 

 on inner distal half, cndoi)odite of right fifth fool much 

 shorter than first segment of exopodite. 



Diaptomus siciloidcs Lilljcborg iHvS<>. 



Found in the Mississippi Valley and west to C alifurnia. A» D '^'f*^ 

 ensis is typical of the Northern States, so D. suMrs m.tv ♦>r ronMdrfr.1 

 as typical of a region a little farther to the south. It • -^ 



Long Island on the east to the Rocky Mountains on : 

 not the exclusive form, is more a|)t to hv seen th,in .r ^ 



along the Ohio River. 



Length of female. i.cX) to i.2iS '"f" 



Length of male, i.oi to i.ii.'S nam. 



Fig. 1210. Fifth feet 

 of male Diaptomus 

 siciloides. X 122. 

 (Original.) 



73 (3, 8) Endopodites of first swimming feet comiH.scd of three s,-pmrnt. 



74 



