218 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



Remarks : Only a single male of this species 

 was found. It is distinguished from males of 

 abdominalis and other species by the symmetri- 

 cal abdomen (fig. 1), divergent furcae (fig. 3) 

 and absence of teeth on segment 17 of the right 

 first antenna (fig. 4). The first segment of 

 both endopods of indica are indented and claw- 

 like (fig. 5) in contradistinction to abdominalis 

 which has this claw-like indentation on only 

 one endopod. 



Pleiiromamma qiiadrungiilata (Dahl, 1893) 



(Plate 22, figs. 8-12) 



Pacific records: Vervoort, 1957. Also, Brodsky, 

 1950. 



Vessel: Station Occurrence 



Hugh M. Smith __ 29 1 female, 3.77 mm. 



Do 63 1 female, 3.51 mm. 



Remarks: The above specimens are refer- 

 able to forma typica Steuer, 1932. It is dis- 

 tinguished from forma psychrophila Steuer, 

 1931, by the presence of a large curved tooth 

 on the fourth segment of the first antennae 

 (fig. 11). In forma psychrophila this tooth is 

 reduced in size and not curved. 



Vleiiromavima gracilis (Claus, 1863) 



(Plate 22, figs. 13-15) 



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

 1929; 1936; Mori, 1937; Taiiaka, 1937; Dakin and 

 Colefax, 1940; Johnson, 1942; Mori, 1942; Wilson, 

 1942; Brodsky, 1950; Wilson, 1950; Anraku, 1952; 



Honjo, 1952; Tanaka, 1953; Anraku, 1954b; Tsuruta 

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

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

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

 1958a. 



Vessel: Station Occurrence 



Hugh M. Smith __ 94 1 female, 1.80 mm. 



Do 29 6 females, 2.01-2.07 



mm. 



Do 63 1 female, 1.90 mm. 



Horizon 32 1 female, 1.94 mm. 



Satsuma 32 1 female, 1.97 mm. 



Remarks : All the specimens obtained of this 

 species are referable to Steuer's (1932) forma 

 minima. This form is distinguished from forma 

 pi^eki (Farran, 1929) and maxima (Steuer, 

 1932) by the divergent margins of the anal 

 segment (fig. 14) and by the fused second basal 

 and exopodal segments of the fifth feet (fig. 

 15). In most of the present specimens the left 

 furca is enlarged (fig. 14). 



Pletiromamma borealis (Dahl, 1893) 



(Plate 22, figs. 16-18) 



Pacific records: Farran, 1929; Brodsky, 1950; Wil- 

 son, 1950. 



Vessel: Station Occurrence 



Hugh M. Smith __ 63 1 female, 2.01 mm. 



Orsom 10 1 female, 1.83 mm. 



Satsuma 32 2 females, 1.90 mm. 



Remarks: The long spines on the fifth feet 

 of the female (fig. 18) distinguished this spe- 

 cies from the preceding one. 



Family CENTROPAGIDAE 



Cenlropages gracilis (Dana, 1849) 



(Plate 23, figs. 1-3) 



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

 1936; Mori, 1937; Dakin and Colefa.x, 1940; Mori, 1942; 

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

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

 Chiba, 1956; Honjo et al., 1957; Yamazi, 1958a. 



Vessel: Station Occurrence 



Hugh M. Smith _^ 132 3 females, 1.90-1.97 



mm. 



Do 153 present. 



Do 178 2 females, 2.00 mm. 



Vessel: Station Occurrence 



Do 30 3 females, 1.97-2.01 



mm. ; 1 male, 2.04 

 nun. 



Stranger 34 1 female, 1.90 mm. 



Satsuma 32 1 male, 1.84 mm. 



Remarks: The female is recognized by the 

 spines on the sides on the second abdominal 

 segment and the short spine-like protrusions 

 on the inner sides of the second exopodal seg- 

 ments (fig. 1) of the fifth feet. The thumb of 

 the chela of the right foot of the male has a 



