COPEPODS FROM EQUATORIAL WATERS OF PACIFIC OCEAN 



239 



finely serrate on the external margin (fig. 18). 

 Of the 2 internal setae on this segment, the 

 distal one is appro.ximately twice the length of 

 the proximal one. The male thorax and ab- 

 domen are symmetrical (figs. 1, 2). The right 

 fifth foot is similar to that of C. bispinosa (fig. 

 5). The left fifth foot terminates in 3 setae, 

 the middle one of which is the longer. The 

 penultimate segment is not particularly en- 

 larged. 



Canilaciu Irniicala (Dana, 1849) 



(Plate 33, figs. 6-14) 



Pacific records: Scott, 1909; Yamada, 1933a; Ta- 

 naka, 1935b; Farran, 1936; Mori, 1937; Dakin and 

 Colefax, 1940; Mori, 1942; Wilson, 1942; Tanaka, 1953; 

 .\nraku, 1954b; Tsuruta and Chiba, 1954b; Chiba, Tsu- 

 ruta, and Maeda, 1955; Motoda and Anraku, 1955; 

 Nagaya et al., 1955; Chiba, 1956; Heinrich, 1957b; 

 Honjo et al., 1957; Yamazi, 1958a; 1958b; Grice and 

 Jones, 1960. As C. tiirgida: Wilson, 1950. 



Vessel : 



Vessel: Station Occurrence 



Stranger 34 7 females, 1.94- 



2.04 mm.; 3 

 males, 1.94-1.97 

 mm. 



Orsom 10 3 females, 1.97-2.04 



mm.; 1 male, 

 2.06 mm. 



Horizon 32 11 females, 1.84-2.00 



mm.; 5 males, 



1.94-2.00 mm. 



. 5 females, 1.87-1.90 



mm.; 3 males, 



1.87-2.00 mm. 



Satsmna 32 



Remarks: The female genital segment is 

 symmetrical and finely pubescent on the lateral 

 margins (fig. 16). The terminal finger of the 

 distal segment of the fifth foot is finely serrate 

 along its outer distal margin (fig. 10). The 

 proximal seta on the internal margin is slightly 

 shorter than the distal one. The male thorax 

 and abdomen are symmetrical (figs. 11, 12). 

 Segment 16 of the right first antenna is pro- 

 duced into an elongate process (fig. 14). The 

 distal spine on the terminal segment of the 

 right fifth foot (fig. 15) is considerably larger 

 than the preceding two spines. The terminal 

 seta on some specimens is articulated to this 

 segment while in others it is not. 



Familv PONTELLIDAE 



Pontella securifer Brady, 1883 



(Plate 34, figs. 1-3) 



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

 and Colefax, 1940; Wilson, 1942; 1950; Tanaka, 1953. 



Vessel: Station Occurrence 



Hugh M. Smith __ 30 2 females, 4.40, 4.46 



mm. 

 Do 31 1 male, 4.40 mm. 



Remarks: Both sexes have a large lens sit- 

 uated at the base of the rostrum. Figures of 

 the male sex are given (figs. 1-3). 



Pontellj tenniremis Giesbrecht, 1889 

 (Plate 34, figs. 4-7) 

 Pacific records: Wilson, 1942; 1950. 



Vessel : Station Occurrence 



Horizon 32 1 male, 2.80 mm. 



Remarks: The structure of the fifth feet 

 (figs. 6, 7) distinguishes the male of this spe- 

 cies from other Pontella. No females wei'e 

 found. 



Lahidocera detriincata (Dana, 1849) 



(Plate 34, figs. 8-10) 



Pacific records: Scott, 1909; Yamada, 1933; Farran, 

 1936; Mori, 1937; Dakin and Colefax, 1940; Mori, 

 1942; 1950; Tanaka, 19.53; Anraku, 1954b; Chiba, 

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

 1956; Yamazi, 1958a; 1958b. 



Vessel : Station Occurrence 



Hugh M. Smith — 30 1 female, 2.72 mm. 



Do 32 1 female, 2.68 mm. 



Remarks: The lateral margins of the last 

 thoracic segment (figs. 8, 9) are pointed and 

 the genital segment is asymmetrical. These 



