Lepeophth eirus dissimulatus — Lewis 
203 
third and fourth pedigerous segments is distinct, 
between the fourth and the genital-abdominal 
segment also distinct although sometimes faint 
in younger specimens. 
The combined genital segment and abdomen 
(Fig. 12c) is slightly shorter than the third 
pedigerous segment, and its greatest width is 
slightly more than its length. The lateral mar- 
gins are flatly convex; the lateral posterior mar- 
gins are flat or slightly concave and form the 
place of attachment for the caudal rami. The 
anal laminae are visible as two knoblike projec- 
b 
c 
Fig. 9- Body of second, third, and fourth chalimus developmental stages of L. dissimulatus. a , Dorsal view 
of early second chalimus; b, dorsal view of late second chalimus; c, dorsal view of third chalimus; d, dorsal 
view of fourth chalimus. Stippled circles, yolk material. 
