172 Pub. Puget Sound Biol. Sta. Vol. 2, No. 44 



PLATE 24 



b, brain. 



ch, chitinous exoskeleton. 



e, tripartite eye. 



g.m, germinal mesoderm. 



I, lateral muscles. 



m, dorsal muscles. 



mxp.g, maxillipedal glands. 



n, ventral nerve cord. 



oe, oesophagus. 



st, stomach. 



w, body wall. 



Fig. 18. Transverse section of first copepodid larva in region of 



tripartite eye (e). X460. 

 Fig. 19. Transvere section of first copepodid larva in region of 



stomach (st). X460. 



