220 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



pronounced triangular protrusion which is ab- 

 sent in other species in the genus (fig. 3). 



Centropages elongatus Giesbrecht, 1896 

 (Plate 23, figs. 4-12) 



Synonymy: 



Centropages pacificus Chiba, 1956, Jour. Shlmonoseki 

 College of Fisheries, 6(1): 47-48. 



Pacific records: Scott, 1909; Mori, 1937; 1942; Wil- 

 son, 1942; Johnson, 1954; Tsuruta and Chiba, 1954b; 

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

 Yamazi, 1958a. 



Vessel : Station Occurrence 



Hugh M. Smith __ 153 1 female, 1.87 mm. 



Horizon 32 2 males, 1.74, 1.76 



mm. 

 Satsuma 32 1 female, 1.66 mm. 



Remarks : The female genital segment is only 

 slightly asymmetrical (figs. 4, 5) and the ab- 

 domen lacks the spines which are present in 

 the preceding species and in a related species 

 (C. violacens) . The spine-like extensions of the 

 second exopodal segments of the fifth feet ex- 

 ceed the distal end of the third exopodal seg- 

 ments (fig. 6). The male is recognized by the 

 structure of the fifth feet, particularly the long 

 external spine near the distal end of the thumb 

 (fig. 10) and the form of the left exopod (figs. 



11, 12). 



Chiba (1956) has described a new species, 

 C. pacificus (based on males), from specimens 

 collected in the Bikini area. I believe these 

 specimens are the males of C. elongatus, a spe- 

 cies which has also been reported from Bikini 

 by Johnson (1954). 



Mori (1937) stated in his discussion of this 

 species that the last thoracic segments of the 

 female are pointed. He also presented a figure 

 showing this point on one lateral margin. How- 

 ever, no mention was made of the pointed mar- 

 gins of the last thoracic segments by Gies- 

 brecht (1896) in his original description of 

 the species nor in the synopsis of this species 

 presented later by Giesbrecht and Schmeil 

 (1898) . The latter authors stated that C. elon- 

 gatus is related to C. violaceus which has round 

 posterior thoracic margins. The present spe- 

 cimens also have rounded margins (fig. 5) . 



Centropages calaninus (Dana, 1849) 



(Plate 23, figs. 13-18) 



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

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

 1942; 1950; Tanaka, 1953; Tsuruta and Chiba, 1954b; 

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

 Chiba, 1956; Gilmartin, 1958; Yamazi, 1958a. 



Vessel : Station Occurrence 



Hugh M. Smith __ 30 1 female, 2.18 mm.; 



1 male, 2.06 mm. 



Horizon 32 3 females, 1.97-2.04 



mm.; 5 males, 

 1.80-2.00 mm. 



Remarks: The anal segment of the female 

 has a small knob on the ventral surface near 

 the posterior end and the spine-like protrusions 

 of the second exopodal segments of the fifth 

 feet exceed the tip of the third exopodal seg- 

 ments (figs. 13, 14). The male is recognized 

 by the structure of the fifth feet, especially the 

 long and bent thumb of the chela (fig. 17). 



Family LUCICUTIIDAE 



Ltickutia jlavicornis (Glaus, 1863) 



(Plate 24, figs. 1-4) 



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

 1929; Mori, 1937; Dakin and Colefax, 1940; Johnson, 

 1942; Mori, 1942; Wilson, 1942; Davis, 1949; Brodsky, 

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

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

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

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

 1957b; Honjo et al., 1957; Heinrich, 1958a; Yamazi, 

 1958a. 



Vessel : Station 



Hugh M. Smith __ 94 __ . 



Do 132 3 



Do 144 4 



Do 178 3 



Occurrence 

 12 females, 1.46-1.90 

 mm.; 7 males, 

 1.43-1.77 mm. 



3 males, 1.29-1.66 

 mm. 



4 females, 1.63-1.80 

 mm. ; 5 males, 

 1.44-1.48 mm. 



females, 1.36-1.53 

 mm. ; 7 males, 

 1.28-1.42 mm. 



