450 
PACIFIC SCIENCE, Vol. XXI, October 1967 
are too scant, however, to draw any definite 
conclusions. 
Family lysianassidae 
Paracallisoma coecus (Holmes) 
During this study 56 specimens were re- 
covered from pint aliquots. The presence of 
ovigerous females was noted in October and 
November and a few were carrying young in 
May. Seasonal variations in number and size 
offer no conclusive data due to the small quan- 
tity of individuals collected. 
Cyphocaris anonyx Boeck 
A total of 1 1 5 individuals was collected from 
pint aliquots. Ovigerous females were noted 
during the months of May, June, July, and 
August, indicating that this season is a time of 
high reproductive activity. No females were 
found which were carrying young. As shown 
in Table 2, there was an extension of the lower 
limit of the size range during the summer 
months and an increase in population density, 
probably indicating the entrance of young into 
the mature population. The drop in mean size 
in the fall may reflect the death of the older 
portion of the population. 
Cyphocaris richardi Chevreux 
A total of 193 specimens was sorted from 
pint aliquots. Table 3 illustrates the pertinent 
reproductive information. 
As can be seen, the greatest production of 
eggs occurred during the fall months, and 
young were present in the brood pouches only 
in the winter. Males were most abundant at 
the times of high ova production. It appears 
that embryonic development took place through- 
TABLE 2 
Seasonal Variation in Mean Size (MS), Size 
Range (SR), and Average Number per 
Trawl Hour (n/th) for 
Cyphocaris anonyx 
SEASON 
MS (mm) 
SR (mm) 
n/th 
Summer 
11.5 
4-14 
37 
Fall 
8 
6-12 
4 
Winter 
13-5 
5-15 
13 
Spring 
10 
7.5-13.5 
30 
out the winter months, with the release of 
young completed by early spring. 
There was a slight drop in mean size and 
in the lower limit of the size range in the 
spring, followed by a more drastic decrease in 
these measurements during the summer. These 
periods indicate the time of the entrance of 
young into the adult population. 
Suborder hyperiidea 
Family platyscelidae 
Platyscelus serratulus Stebbing 
Only 8 specimens of this species were taken, 
all of which were females. Although Hurley 
(1956) collected P. serratulus from southern 
California waters during the months of January 
and February, the individuals captured during 
this present study were taken in September and 
November. Ovigerous females were noted in 
November. Sizes ranged from 3 to 7 mm with 
a mean of 5.1 mm for the 8 specimens col- 
lected. 
Family pronoidea 
Eupronoe minuta Claus 
In all, 322 individuals were collected from 
pint aliquots. From the data presented in Table 
4 it can be seen that some of the reproductive 
activity of E. minuta is not clear, in that the 
greatest production of ova occurred at the same 
time as the highest incidence of young in the 
brood pouches. Apparently young were released 
from the females early in the fall. This release 
is indicated by a drop in the percentage of 
females carrying young, a drop in mean size, 
and an extension of the lower limit of the size 
range. Males were present only during the fall 
months, suggesting that that was the period of 
fertilization. 
Family phrosinidae 
Primno macropa Guerin 
A total of 315 individuals was taken from 
pint aliquots. The pertinent reproductive data 
are recorded in Table 5. 
Maximum production of eggs occurred in the 
