Two New Species of Candacia (Copepoda: Calanoida) 
from the Central Pacific, with Notes on Two Other Species 1 
George D. Grice 2 and Everet C. Jones 3 
During examination of plankton samples 
collected from the central Pacific Ocean by the 
Honolulu Biological Laboratory (formerly Pa- 
cific Oceanic Fishery Investigations) of the U. S. 
Fish and Wildlife Service, two species of Can- 
dacia were found which appear to be un- 
described. In addition to describing these two 
species we present evidence that Candacia tur- 
gida Wilson is a synonym of C. truncata (Dana). 
We also include a description and figures of 
Candacia norvegica (Boeck), a species appar- 
ently rare in the Pacific Ocean. 
We wish to acknowledge the help of Dr. 
Thomas E. Bowman in loaning us type material 
from the U. S. National Museum, and that of 
Dr. Paul L. Illg for valuable suggestions during 
the preparation of the type material and the 
manuscript. 
Candacia pofi new species 
Figs. 1-21 
LOCALITY AND MATERIALS: 1° 23' S., 112° 
46' W. (U. S. Fish and Wildlife Service "Hugh 
M. Smith" cruise 31, station 75-3, Oct. 31, 1955, 
200-140 m. depth of tow; 23 females and 6 
males). Physical, oceanographic, and other data 
from this cruise have been published by King, 
Austin, and Doty (1957). 
Type material of Candacia pofi has been de- 
posited in the U. S. National Museum as fol- 
lows: Female holotype (USNM 102730), male 
allotype (USNM 102731), 22 female paratypes 
and 5 male paratypes (USNM 102732). 
MEASUREMENTS: Measurements were made 
1 Contribution No. 131, Hawaii Marine Laboratory, 
University of Hawaii, with which one of the authors 
(G. D. G.) was associated. Manuscript received Janu- 
ary 16, 1959- 
2 Fellow of the John Simon Guggenheim Memorial 
Foundation, 1958-59. Present address: Woods Hole 
Oceanographic Institution, Woods Hole, Massachusetts. 
3 Bureau of Commercial Fisheries, Biological Lab- 
oratory, Honolulu, Hawaii. 
from a dorsal view along a sagittal plane. The 
abdomen was supported by a plastic strip to 
reduce flexion. The copepod, stained with methyl 
blue and immersed in lactic acid, was mounted 
under a cover slip supported by plastic strips 
to avoid distortion due to pressure or a meniscus. 
The total length was measured from the anterior 
margin of the head to the ends of the caudal 
furca. The abdomen was measured from the 
anterior margin of the genital segment to the 
ends of the caudal furca. These measurements 
excluded the telescoped portions of the abdom- 
inal segments. The ratios of the lengths of the 
abdominal segments, however, include the tel- 
escoped portions as indicated by dotted lines in 
the figures. Pertinent measurements and ratios of 
the cephalothorax and abdomen of the holotype, 
allotype, 3 female paratypes, and 4 male para- 
types are given in Table 1. 
DESCRIPTION: In the adult female the ceph- 
alothorax ( Fig. 1 ) is slender, being widest at 
the first thoracic segment. The posterior lateral 
angles of the thorax are produced into sharp 
symmetrical processes which reach to a line in- 
cluding 60 per cent of the length of the genital 
segment (Fig. 3). The genital segment (Fig. 
3) is symmetrical in dorsal view, longer than 
wide and without lateral swellings or processes. 
The genital pore is situated on a very large 
protuberance which extends ventrad and caudad. 
In lateral view (Figs. 2,4), the posterior margin 
of this protuberance is approximately continuous 
with the posterior margin of the genital seg- 
ment. In ventral view (Fig. 5), the genital 
protuberance is round with a slight lip at the 
posterior margin. In the holotype, this lip is 
slightly asymmetrical. The second abdominal 
segment (Fig. 3) is asymmetrical in dorsal 
view, the right margin being convex and the 
left margin straight. The ventral surface is 
wrinkled and bears a low process which extends 
to the left as a lobe with a more or less crenulate 
margin. 
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