COPEPODS FROM EQUATORIAL WATERS OF PACIFIC OCEAN 



235 



Tsuruta and Chiba, 1954b; Chiba, Tsuruta, and Maeda, 

 1955; Nagaya et al., 1955; Yamazi, 1958a. 



Vessel : Station Occurrence 



Hugh M. Smith 178 present. 



Do 63 2 females, 1.56, 1.63 



mm.; 2 males, 

 1.46, 1.53 mm. 



Stranger 34 7 females, 1.60-1.67 



mm.; 2 males, 

 1.53, 1.62 mm. 



Orsom 10 1 female, 1.53 mm.; 



1 male, 1.43 mm. 



Horizo7i 32 1 female, 1.59 mm. 



Remarks : This is a small species, the females 

 of which have a symmetrical genital segment 

 (figs. 17, 19). The ventral surface is produced 

 into a lobe (figs. 18, 20). The basal tooth of 

 the mandible ends in 3 cusps, the lowermost 

 one of which is quite small (fig. 21). The fifth 

 foot terminates in 3 unequal points (fig. 1). 

 The male posterior thoracic margins are sym- 

 metrical (figs. 2, 4) and the chela of the right 

 fifth foot is small. The thumb of the chela has 

 a long spine protruding from its tip (fig. 6). 



Candacia hispinosa (Glaus, 1863) 

 (Plate 32, figs. 7-14) 



Pacific records: Scott, 1909; Parran, 1929; Tanaka, 

 1935b; Farran, 1936; Mori, 1937; Johnson, 1942; Wil- 

 son, 1942; 1950; Honjo, 1952; Tanaka, 1953; Anraku, 

 1954b; Tsuruta and Chiba, 1954b; Chiba, Tsuruta, 

 and Maeda, 1955; Motoda and Anraku, 1955; Nagaya 

 et a!., 1955; Chiba, 1956; Heinrich, 1957b; Honjo et al., 

 1957; Heinrich, 1958a; Yamazi, 1958a. 



Vessel : Station Occurrence 



Hugh M. Smith __ 153 3 females, 1.66-1.80 



mm. 



Do 178 1 female, 1.60 mm. 



Stranger 34 1 female, 1.67 mm.; 



1 male, 1.73 mm. 



Orsom 10 1 female, 1.56 mm.; 



1 male, 1.56 mm. 

 Satsuma 32 1 male, 1.70 mm. 



Remarks : This species and the following two 

 species, C. simplex (Giesbrecht) and C. tnin- 

 cata (Dana), differ in a few details (e.g., struc- 

 ture of right, first antenna in male and fifth 

 feet in both sexes) from the preceding nine 

 species. It has been suggested by Sars (1903) 

 that these three may have to be removed from 

 the genus Candacia. 



The female of C. hispinosa has two spine-like 

 protrusions arising from the genital segment 

 (fig. 7). These protrusions, particularly the 

 one on the left side, are quite variable in shape 

 and in size. In one specimen (Smith 178) the 

 left protrusion reaches nearly to the anal seg- 

 ment. There is a small rounded knob arising 

 from the ventral side of the genital segment 

 near the posterior end (fig. 8). The pre-anal 

 segment is asymmetrical. The left side is di- 

 lated near the anterior end, but there is some 

 variation in the size of the protrusion. The 

 ventral surface of this segment may or may not 

 have a row of hairs arising from near the pos- 

 terior end. The basal tooth of the mandible is 

 undivided, but one or more spine-like processes 

 are present on this tooth (fig. 9). The large 

 terminal finger-like protrusion of the distal seg- 

 ment of the fifth foot is finely serrate on both 

 sides (fig. 12). 



Segment 20 of the right first antenna of the 

 male is swollen distally (fig. 13). There are 3 

 outer edge spines on the distal segment of the 

 right fifth foot (fig. 14). The proximal spine 

 is shorter than the distal two spines. The 

 penultimate segment of the left fifth foot is en- 

 larged and the outer edge seta of the distal 

 segment is shorter than the terminal ones. 



Candacia simplex (Giesbrecht, 1889) 

 (Plate 32, figs. 15-18; plate 33, figs. 1-5) 



Pacific records: Scott, 1909; Farran, 1929; 1936; 

 Mori, 1937; Johnson, 1942; Mori, 1942; Wilson, 1942; 

 19.50; Tanaka, 1953; Tsuruta and Chiba, 1954b; Chiba, 

 Tsuruta, and Maeda, 1955; Nagaya et al., 1955; Rose, 

 1955; Chiba, 1956. 



Occurrence 

 1 female, 1.93 mm. 

 8 females, 1.7.3-1.87 

 mm.; 3 males 

 1.73-1.83 mm. 



144 present. 



153 1 female, 1.67 mm. 



178 2 females, 1.90 mm.; 



1 male, 1.80 mm. 



Remarks : The genital segment of the female 

 is slightly asymmetrical and has a group of 

 small hair-like structures which are visible on 

 the right side (figs. 15, 16). The terminal 

 finger of the distal segment of the fifth foot is 



Vessel: Station 



Hugh M. Smith __ 94 — 



Do 132 — 



Do 



Do 



Do 



