180 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



a small notch. In forma typica, both segments 

 6 and 7 of the first antennae have a row of 

 spinules along the distal margin (fig. 2). The 

 left fifth thoracic mai'gin is somewhat vari- 

 able in shape. Typically, it is produced into a 

 point which is directed ventrally (fig. 3). In 

 a few individuals this margin was expanded 

 and rounded (fig. 4). In forma symmetrica, a 

 row of spinules is also present on segments 6 

 and 7 of the first antennae, but the two thoracic 

 margins are symmetrical (figs. 5, 6). In forma 

 intermedia, spinules are present on segments 3 

 through 7 of the first antennae, and the left 

 fifth thoracic margin is usually more or less 

 triangular in shape (fig. 7). In several speci- 



mens, this margin was rounded similar to that 

 of forma symmetrica (fig. 8). Most examples 

 of forma intermedia also had a small group 

 of spines situated on the left mid-lateral margin 

 of the second abdominal segment. 



Chiba (1953a) has recently discussed and 

 presented figures of small (40-60/i) spherical 

 bodies which he detected within the furcae of 

 the female of this species. He considered these 

 objects to be eggs and analogized the "egg 

 chamber" (furca) to the brood sac of daphnids. 

 I too have seen these bodies in the furcae of 

 this species. They are possibly protozoan para- 

 sites but not the reproductive eggs of the 

 species. 



Family EUCALANIDAE 



Eticalanns attenuatus (Dana, 1849) 



(Plate 2, figs. 10, 11) 



Pacific records: Vervoort, 1946. Also, Yamada, 

 1933a; Tanaka, 1935a; Mori, 1937; Johnson, 1942; 

 Mori, 1942; Wilson, 1942; Brodsky, 1950; Wilson, 1950; 

 Anraku, 1952; Honjo, 1952; Tanaka, 1953; Yamazi, 

 1953c; Anraku, 1954b; Johnson, 1954; Tsuruta and 

 Chiba, 1954b; Yamazi, 1954d; Brodsky, 1955; Chiba, 

 Tsuruta and Maeda, 1955; Hida and King, 1955; Mo- 

 toda and Anraku, 1955; Nagaya et al., 1955; Rose, 

 1955; Yamazi, 1955a; 1955d; Chiba, 1956; Tanaka, 

 1956a; Honjo et al., 1957; Heinrich, 1958a; 1958b; 

 Yamazi, 1958a; Brodsky, 1959; Lindberg, 1959; Pono- 

 mareva, 1959. 



Vessel : Station Occurrence 



Hugh M. Smith __ 132 1 female, 3.89 mm. 



Do 153 present. 



Do 178 2 females, 3.61, 3.80 



mm.; 1 male, 2.96 

 mm. 



Do 30 1 female, 3.16 mm. 



Do 31 5 males, 2.92-3.06 



mm. 



Do 63 2 females, 3.90, 4.08 



mm. 



Stranger 34 1 female, 3.06 mm. 



Horizon 32 7 females, 3.90-4.28 



mm.; 1 female 

 (stage V) 3.20 

 mm. 



Remarks: Vervoort (1946) noted that there 

 were large variations in the sizes of his speci- 

 mens (females, 3.5.5-5.80; males 2.95-4.35) 

 from the Netherlands East Indies, but he could 



find no anatomical differences between the size 

 groups. Tanaka (1956a) likewise observed 

 that there were large size variations (female, 

 4.32-6.19; male, 3.24-4.67) in the lengths of 

 specimens obtained from the Izu region of 

 Japan. He reported differences (shape of geni- 

 tal segment, presence of hair on female, rela- 

 tive lengths of segments of fifth pair of feet in 

 the male) between the larger specimens of this 

 species and suggested that a northern variety 

 may have been present. The lengths of the 

 present specimens were not nearly so variable 

 as those reported by Vervoort or Tanaka. 



Eucalantis mucronattts Giesbrecht, 1888 



(Plate 2, figs. 12-18) 



Pacific records: Vervoort, 1946; 1957. Also, Ya- 

 mada, 1933; Tanaka, 1935a; Honjo, 1952; Nakai, 1952; 

 Tanaka, 1953; Yamazi, 1953a; Anraku, 1954b; Chiba, 

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

 Nagaya et al., 1955; Tanaka, 1956a; Honjo et al., 1957; 

 Yamazi, 1958a; 1958b. 



Vessel : Station Occurrence 



Horizon 32 1 female (stage IV), 



2.07 mm.; 1 male 

 (stage V), 2.55 

 mm. 



Remarks: Juveniles of this species were 

 found in one collection. They are easily recog- 

 nized by the pointed forehead, which is present 

 in both sexes. 



