COPEFODS FROM EQUATORIAL WATERS OF PACIFIC OCEAN 



203 



Vessel: Station Occurrence 



Giesbrecht and Schmeil, 



1898 (tropical Pacific) ___ 3.3 mm. 2.75 mm. 

 Heinrich, 19o8b (tropical 



Pacific) 2.5 mm. 



Farran, 1936 (inside Barrier 



Reef) 3.25-3.40 2.54-2.76 



mm. mm. 

 Farran, 1936 (outside Bar- 

 rier Reef) 2.36-2.67 



mm. 

 Dakin and Colefax, 1940 



(Australia) 3.75 mm. 2.6 mm. 



Sewell, 1929 (Indian Ocean) 2.5-3.5 2.4-3.0 



mm. mm. 



Wolfenden, 1905 (Indian 



Ocean) 2.75-3.0 



mm. 



In view of the wide size range in both sexes 

 and the variable nature of the genital segment 

 in the female, it seems best to consider E. con- 

 similis as a synonym of E. concinna. 



Euchaeta longicornis Giesbrecht, 1888 



(Plate 14, figs. 14-20) 



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

 Mori, 1937; Wilson, 1950; Honjo, 1952; Nakai, 1952; 

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

 JIaeda, 1955; Nagaya et al., 1955; Honjo et al., 1957; 

 Tanaka, 1958. 



Vessel : Station Occurrence 



Hugh M. Smith __ 94 3 females, 2.88 mm. 



' Do 132 8 females, 2.65-2.92 



mm.; 1 male, 2.65 

 mm. 



Remarks : The female genital segment has a 

 large protrusion on the right side from which 

 arises a smaller spine-like process. 



Wilson (1950) described the male sex of this 

 species. I have compared my single male spe- 

 cimen (except the body, which was destroyed 

 in dissection) to one identified by G. 0. Sars 

 and loaned to me by the U.S. National Museum. 

 The two are unispecific. In the Museum speci- 

 men a small spine is present on the superior- 

 lateral margins of the fifth thoracic segment as 

 is also found on the male of E. wolfendeni (see 

 plate 13, fig. 7). I probably overlooked these 

 spines in my specimen and therefore they are 

 not shown in the figure given of the male (fig. 

 18). 



Euchaeta spinosa Giesbrecht, 1892 



(Plate 14, figs. 21-23) 



Pacific records: Esterly, 1905; Johnson, 1942; Brod- 

 sky, 1950; Wilson, 1950; Tanaka, 1953; 1958. As male 

 of Undeicchaeta major; Esterly, 1905. 



Vessel : Station 



Hugh M. S7nith __ 29 __. 



Occtirrence 

 1 female, 6.94 mm. 



Remarks: The ventral projections of the 

 genital segment (fig. 22) are visible in dorsal 

 view. The middle spine on the outer margin 

 of the third exopodal segment of the second 

 feet is greatly elongate, and the spine on the 

 second exopodal segment surpasses the tip of 

 the first spine on the third segment (fig. 23). 



Family PHAENNIDAE 



Phaenna spinifera Glaus, 1863 Remarks : The globular thorax, small ab- 



(Plate 15, FIG. 1) domen, and lack of fifth feet (in the female) 



make this species easily recognized. Vervoort 



Pacific records: Scott, 1909; Farran, 1929; Mori, ng-^Q) placed Wilson's Onclwcalanus nudipes 



1937; Wilson, 1942; 1950; Tanaka, 19.53; Anraku, ^ ' . „,•„,-/„..„ 



1954b; 1954c; Tsuruta and Chiba, 1954b; Chiba, Tsu- m synonymy with Phaenna spinifera. 

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



Xagaya et al., 1955; Chiba, 1956; Honjo et al., 1957; Xanlhocalanus dilatus n. sp. 



Vamazi, 19.'i8a. As Onchocalanus nudipes; Wilson, fPL4TE 15 KIC! ''-ID 

 1942. 



Vessel: Station Occurrence 



^"^'t'- , „ c • , ^ n'"" Occurrence ^^ ^^^^.^^^ _ ^^^ _ ,, j^^^,^^^ ^ 5^^ ^ g^ 



Hur/h M. Smith — 94 present.  



Do 132 3 females, 1.87-1.90 



mm. Description : The head and first thoracic seg- 



Do 31 __-_ 1 female, 1.60 mm. ^^^^^ ^^^^ iom'th and fifth thoracic segments 



o..s.„!r.::::::::: S :::: ilemaie, 1.87 mm. are separate (figs. 2, 3). The posterior lateral 



Horizon 32 present. margins of the first thoracic segment are dis- 



