454 
PACIFIC SCIENCE, Vol. XIX, October 1965 
mal A colour pattern, although the anal spots 
were replaced by a longitudinal stripe. On closer 
•examination faint traces of the black lateral 
dots and the blue opercular marks of the B 
phase could be detected. 
Approximately 400 specimens were exam- 
ined both in the field and in the laboratory. 
The results are presented below under the rele- 
vant headings. 
Correlation of Sex and Size 
With Colour Pattern 
Data concerning the size range, sex, and 
colour pattern of a range of specimens are pre- 
sented in Figures 4 and 5. These data are based 
on an examination of the colour pattern and 
gonads of 399 specimens ranging from 71 to 
255 mm T.L. This investigation revealed the 
following facts: 
( 1 ) Of the 399 specimens examined 280 
were females, 105 males, and 14 could not 
Be sexed due to decomposition of the viscera. 
(2) The smallest female measured 71 mm j 
T.L., the largest 240 mm T.L. 
(3) The smallest male measured 104 mm 
T.L., the largest 255 mm T.L. 
(4) Of the 280 females 279 exhibited a 
typical A colour pattern, and one specimen 240 
mm T.L. exhibited a pattern transitional be- 
tween A and B. 
( 5 ) Of the 105 males 94 exhibited a typical 
B colour pattern, six exhibited an A pattern, 
and four appeared to be transitional between 
A and B. (In Figure 4 it was found necessary 
to include specimens exhibiting transitional 
colour patterns as belonging to that group with 
which their pattern showed the strongest af- 
finity.) 
(6) Those exhibiting transitional colour 
patterns ranged from 141 to 177 mm T.L., ex- 
cept for one female 240 mm T.L. 
(7) The six male specimens exhibiting an 
A colour pattern ranged from 104 to 149 mm 
T.L., and all contained well developed and ap- 
parently functional testes. 
NO. OF 
FISH 
□ COLOUR PHASE A 
■ COLOUR PHASE B 
13 AREA OF OVERLAP 
1 
ULi 
90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 
TOTAL LENGTH IN MMS. 
FIG. 4. Relationship of colour pattern exhibited to total length. 
