174 
PACIFIC SCIENCE, Vol. XXI, April 1967 
Scaphognathite of maxilla (Fig. 5, G) has ap- 
proximately 30 proximal and 12 distal plumose 
setae, setation of basopodite increased to ap- 
proximately 16, and the coxopodite now bears 
1 1 setae. Setation of exopodite of first and 
second maxillipeds (Fig. 5, H—l) has increased 
to 12. Setation of endopodite of first maxilliped 
is now 2, 3, 2, 2, 6. 
megalops (Fig. 6, A-K ) : Cephalothorax 
without rostral spines and provided with hairs 
at lateral edges (Fig. 6, A). Abdomen 6-seg- 
mented, with telson (Fig. 6, B) bearing 4 
dorsal and 3 terminal plumose setae. Antennule 
(Fig. 6, C) with 2 flagella on second segment. 
Unsegmented flagellum with 3 terminal setae 
and 1 subterminal seta. The 4-segmented flagel- 
lum bears 3 aesthetes on the second segment, 4 
aesthetes plus 1 seta on the third segment, and 
5 aesthetes on the terminal segment. Antenna 
(Fig. 6, D) with 11 segments and setation as 
shown in Figure 6, D. Mandible (Fig. 6, E ) 
with 2 -segmented palp bearing 9 plumose setae 
on terminal segment. Unsegmented endopodite 
of maxillule (Fig. 6, F) with 2 terminal and 
4 lateral setae. Basopodite with approximately 
21 spines and setae and the coxopodite with 6 
terminal and 5 lateral setae. Scaphognathite of 
maxilla (Fig. 6, G ) fringed with approximately 
70 plumose setae (Fig. 6, G). Unsegmented 
endopodite bearing 2 unequal terminal setae 
and 1 subterminal plumose seta. Lobes of baso- 
podite bearing 13 and 11 plumose setae, respec- 
tively, and lobes of coxopodite with 6 and 12 
setae. The first, second, and third maxillipeds 
are as shown in Figure 6, H, I, and /. Setation 
of exopodites of pleopods of abdominal seg- 
ments two to five varies from 17 to 20. Endo- 
podites of all pleopods have 3 median hooks 
(Fig. 6, K ). Uropods bisegmented with 1 seta 
on first segment and 10 setae on second 
segment. 
Chromatophore pattern of carapace as fol- 
lows: one, dorsomedian surface, one on each 
median-lateral border, a pair on ventral surface 
of rostrum, joined at the median line, and one 
at each posteriolateral corner. Chromatophore 
pattern of appendages: one on each eyestalk, 
one on basopodite of antennule, one on basopo- 
dite of cheliped, mandibles, and labrum. With- 
in the abdominal segments melanophores are 
located as follows: one in first segment, dorsal 
to gut, extending into cephalothorax; one at 
posterioventral margin of segments two through 
five, the chromatophore of segment five ex- 
tending into proximal region of segment 
six. 
MOLT I MOLT H 
30ppt. 35 P pt. 3 °ppl- 35 Ppb 
1 
MOLT in MOLT Et MOLT 3 Z 
30ppt. 35ppt. 30ppt. 35ppf. 30ppt. 35ppt. 
PERCENT MOLTS 
— roto^LnO^ODioc 
O.Oo OoO OOOOC 
1 
1 
ulil i l i .l . .r i: l 
<n lO Tj- lT) IT) CD rj- iD OO— O- CD 0> O cO fO i/"> lO r- O— OJ O— OJ COOlO — C\J aOO'O O <0 rf vT» tO f-* 00 o> O — (\J ^ 0*0— OJf*W iD <Or-- CO 0> COCT) 0 — 
— — CVJ CVJ’CM OJ OJ (\J OJ OJ OJ OJ fO fOfO fr > — OJOJOJ OJOJ OJ OJOJOJ OJ 0J(\1 
CYCLOGRAPSUS CINEREUS DAYS OF DEVELOPMENT 
■ 20* c 
□ 25* C 
Fig. 7. Comparison of the time of larval molts for zoeae and megalops of Cyclograpsus cinereus Dana 
reared in the laboratory at different salinities and temperatures. Black , 20°C ; white, 25°C 
