PHYLUM ARTHROPODA 



295 



S ? Ad 



FIG. 213. 



FIG. 213. Subclass COPEPODA. Cyclops, dorsal view of female. /, ist 

 antenna; 2, 2d antenna; 3, eye; 4, ovary; 5, uterus; 6, oviduct; 7, sperma- 

 theca; 8, egg-sacs; g, caudal fork; 10, position of anus; n, segment consist- 

 ing of last thoracic and first abdominal. (From Shipley and MacBride, partly 

 after Hartog.) 



FIG. 214. Subclass CIRRIPEDIA. Balanus tinlinnabidum, one-half of sln.ll 

 has been removed. Ad, adductor muscle; Od, oviduct; Oe, opening of oviduct; 

 Ov, ovary; Sc, scutum; Te, tergum; Tu, section of outer shell. (From Sedg- 

 wick's Zoology, after Claus.) 



FIG. 215. Order NEBALIACEA. Nebalia geofroyi, female. A', anten- 

 nule; A", antenna; D, intestine; .!/, crop; 0, stalked eye; R, movable 

 head plate. (From Sedgwick's Zoology, after Claus.) 



