COPEPODS FROM EQUATORIAL WATERS OF PACIFIC OCEAN 



231 



terminal points and 3 internal, apparently un- 

 articulated, setae (fig. 11). The male has a 

 bifid spine-like protrusion (lateral view) ex- 

 tending from the right posterior margin of the 

 thorax (figs. 13, 15). There is a rounded tu- 

 bercle and a spine-like point arising from the 

 right side of the genital segment (fig. 14). The 

 chela of the right fifth foot is broad and spin- 

 ous (fig. 16). 



Candacia pacbydactyla (Dana, 1849) 

 (Plate 30, figs. 1-9) 



Pacific records: Scott, 1909; Tanaka, 193.5; Mori, 

 1937; Dakin and Colefax, 1940; Wilson, 1942; 1950; 

 Chiba, 19.52c; Tanaka, 1953; Tsuruta and Chiba, 1954b; 

 Chiba, Tsuruta, and Maeda, 1955; Hida and King, 

 1955; Nagaya et al., 1955; Chiba, 1956; Honjo et al., 

 19.57; Yamazi, 19.58a. 



Vessel : Station Occurrence 



Hugh M. Smith __ 132 2 males, 2.52 mm. 



Do 153 1 female, 2.82 mm.; 



1 male, 2.07 mm. 



Do 178 2 males, 2.52 mm. 



Do 30 4 females, 2.48-2.55 



mm. ; 1 male, 2.48 

 mm. 



Do 63 1 female, 2.88 mm.; 



4 males, 2.45-2.72 

 mm. 



Stranger 34 3 females, 2.62-2.65 



mm. ; 2 males, 

 2.38, 2.52 mm. 



Orsom 10 1 male, 2.48 mm. 



Horizon 32 6 females, 2.55-2.62 



mm. ; 6 males, 

 2.31-2.55 mm. 



Remarks: This is a robust species and is 

 easily distinguished by the coarse spine-like 

 protrusions of the genital segment of the fe- 

 male (figs. 1, 2). The basal tooth of the man- 

 dible ends in 3 very unequal cusps (fig. 3) . The 

 distal segment of the fifth feet ends in 3 points, 

 the innermost one of which is curved (fig. 4). 

 The right posterior margin of the thorax of the 

 male (figs. 5, 6) is similar to that of C. aethio- 

 pica but the protrusion of the genital segment 

 is quite large (fig. 7). The thumb of the chela 

 on the right fifth foot ends in a long spine as 

 does the distal segment of the left foot (figs. 

 8,9). 



Candacia curia (Dana, 1849) 



(Plate 30, nas. 10-14; plate 31, figs. 1-3) 



Pacific records: Esterly, 1905; Scott, 1909; Farran, 

 193.5b; Farran, 1936; Mori, 1937; Johnson, 1942; Wil- 

 son, 1942; i950; Tanaka, 1953; Tsuruta and Chiba, 

 1954b; Chiba, Tsuruta, and Maeda, 1955; Nagaya et al., 

 1955; Chiba, 1956; Honjo et al. 1957; Yamazi, 195Sa. 

 As C. bicomuta; Mori, 1932. 



Vessel: Station Occurrence 



Hugh M. Smith __ 29 2 females, 2.48. 2.62 



mm.; 2 males, 

 2.28, 2.34 mm. 



Orsom 10 1 female, 2.44 mm.; 



1 male, 2.20 mm. 

 Horizon 32 1 female, 2.58 mm. 



Remarks: The female genital segment is 

 slightly asymmetrical in dorsal view (fig. 10) 

 and has a spine-like protrusion on the ventral 

 side (fig. 11). This spine-like protrusion orig- 

 inates from the right side of the segment (fig, 

 12). The basal tooth of the mandible has 3 

 cusps, the lowermost one of which arises from 

 behind the other two (fig. 13). There are 2 

 points on the distal end of the fifth foot and 

 another point a short distance back of the distal 

 end (fig. 14). The right posterior thoracic 

 margin of the male ends in a hooked spine-like 

 point (fig. 1) and there is a curved, pointed 

 protrusion from the right side of the genital 

 segment (fig. 2) . The chela of the fifth foot is 

 also diagnostic (fig. 3). 



Candacia bipinnala (Giesbrecht, 1889) 



(Plate 31, figs. 4-7) 



Synonymy : 



Candacia bipinnata (Giesbrecht, 1889, Atti Ace. 

 Lincei Rend., ser. 4, 5 sem. 1: 815). 



Candacia pectinata (not of Brady, 1878) Esterly 

 (1905, Univ. Calif. Publ. Zool., 2(4): 193); Mori 

 (1937, The pelagic Copepoda from the neighboring 

 waters of Japan, p. 83) ; Dakin and Colefax (1940, 

 Publ. Univ. Sydney Dept. Zool. Monogr. 1, p. 105). 

 (C. pectinata Brady, 1878 = C. arnuita Boeck, 1873.) 



Pacific records: Esterly, 1905; Scott, 1909; Tanaka, 

 1929; Yamada, 1933; Tanaka, 1935b; Mori, 1937; Dakin 

 and Colefax, 1940; Johnson, 1942; Wilson, 1942; Davis, 

 1949; Motoda, lizuka, and -Anraku, 1950; Brodsky, 

 1950; Wilson, 1950; Anraku, 1952; Honjo, 1952; An- 

 raku, 1953; Tanaka, 1953; Anraku, 1954b; Chiba, 

 Tsuruta, and Maeda, 1955; Motoda and Anraku, 1955; 

 Nagaya et al., 1955; Chiba, 1956; Honjo et al., 1957; 



