COPEPODS FROM EQUATORIAL WATERS OF PACIFIC OCEAN 

 Family AUGAPTILIDAE 



223 



Haloptiliis acutifrons (Giesbrecht, 1892) 



(Plate 25, figs. 1-8) 



Pacific records: Vervoort, 1957. Also, Johnson, 1942; 

 Brodsky, 1950; Tanaka, 1953; Anraku, 1954b; Chiba, 

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

 1956; Yamazi, 1958a. 



Vessel : Station Occurrence 



Hugh M. Smith __ 94 1 female, 3.80 mm. 



Remarks: Although closely resembling H. 

 oxycephalus. H. acutifrons may be distinguished 

 by (1) its small size, (2) less produced fore- 

 head (fig. 1) and (3) structure of the gnathal 

 lobe of the mandible (fig. 3). 



Haloptilus jerlilh {Giesbrecht, 1892) 

 (Plate 25, figs. 9-11) 

 Pacific recoi'ds: none. 



Vessel: Station 



Hugh M. Smith __ 32 __. 



Occurrence 

 1 male, 2.47 mm. 



Remarks: The male is recognized by its 

 small size and structure of the fifth feet (fig. 

 11). 



Haloptilus longiconiis (Glaus, 1863) 



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

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

 Brodsky, 1950; Wilson, 1950; Tanaka, 1953; Yamazi 

 1953c; Chiba, Tsuruta, and Maeda, 1955; Nagaya et 

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

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



Vessel : 



Hugh M. Smith 

 Do 



Station 

 . 94 __. 

 132 __. 



Occurrence 



present. 

 9 females, 



mm. 

 present. 

 Do 

 Do 

 Do 

 Do 

 Do 

 Do 

 Do 

 5 females, 



mm. 



1.80-1.90 



1.77-1.83 



Remarks : The long first antennae which ex- 

 ceed the end of the furca and the knob-like 

 button on the forehead will identify the female. 

 No males were found. 



As the occurrence records indicate, this was a 

 widespread species in the present collections. 

 It was also the most abundant species of Halop- 

 tilus and occurred in fair numbers in several 

 samples (Smith 94, 144, 31). 



Haloptilus ornutus (Giesbrecht, 1892) 



(Plate 25, figs. 12-16) 



Pacific records: Scott, 1909; Mori, 1937; Johnson, 

 1942; Wilson, 1942; Wilson, 1950; Tanaka, 1953; An- 

 raku, 1954b; Chiba, Tsuruta, and Maeda, 1955; Nagaya 

 et al., 1955; Chiba, 1956. 



Vessel: Station 



Hugh M. Smith __ 63 __. 



Occurrence 

 1 female, 4.56 mm. 



Remarks: This is a large species and has a 

 rounded forehead. As in other species of Ha- 

 loptilus. the form of the gnathal lobe of the 

 mandible is also diagnostic (fig. 13). 



Haloptilus spiniceps (Giesbrecht, 1892) 



(Plate 25, figs. 17-20; plate 26, figs. 1-5) 



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

 Mori, 1937; Dakin and Colefax, 1940; Johnson, 1942; 

 Wilson, 1942; 1950; Tanaka, 1953. 



Vessel: Station Occurrence 



Hugh M. Smith __ 94 1 female, 3.99 mm. 



Stranger 34 1 female, 3.70 mm. 



Orsom 10 present. 



Horizon 32 1 female, 3.80 mm. 



Satsuma 32 1 female, 3.80 mm. 



Remarks: The short pointed forehead (fig. 

 17) which is curved downward in lateral view 

 (fig. 18) and the structure of the gnathal lobe 

 of the mandible (fig. 20) will identify the fe- 

 male of this species. No male has been found. 



Haloptilus austini Grice, 1959 

 Pacific records: Grice, 1959. 



Vessel: Station Occurrence 



Hugh M. Smith __ 94 2 females, 3.16, 3.33 



mm. 



Remarks : I have recently described this spe- 

 cies. It has a rounded forehead and, as in other 

 species of Haloptilus. the gnathal lobe of the 

 mandible is diagnostic. 



