200 
PACIFIC SCIENCE, VoL XVII, April 1963 
are distinct, the anterior being irregularly con- 
vex and the posterior irregularly concave; the 
lateral margins are broadly convex. The free 
third pedigerous segment is approximately two- 
thirds the width of the second and is slightly 
wider than long. The lateral margins of the seg- 
ment are broadly convex in younger specimens, 
straight in older; the width of the posterior end 
of the segment is slightly greater than that of 
the anterior in older specimens but equal to or 
2mm ' 02m 
/ * 
Fig. 8. Egg string of L. dissimulatus and body of developmental stages from nauplius to first chalimus. 
a. Posterior end of ruptured egg string, showing first nauplius just emerging; b, empty egg string after hatch- 
ing; c, dorsal view of first nauplius; d, dorsal view of early second nauplius; e, dorsal view of late second 
nauplius; f, dorsal view of copepodite; g, dorsal view of first chalimus. Stippled circles, yolk material. 
