2Y8 FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



Neocalanus robustior (Giesbrecht, 1888) (1950) speak of the great abundance of this 



(Plate 1 fig. 21) species in the Netherlands East Indies and near 



the Hawaiian Islands, respectively. Scott 



Pacific records: Vervoort, 1946 Also, as Calanus ^g^g^ ^j^^ ^^^^^ j^ abundantly in the Malay 



robustior; Mori, 1937; Honjo, 1952; Yamazi, 1953a; » , . , ... ^ , ,^^.r^s  



Tsuruta and Chiba, 1954b; Chiba,Tsuruta, and Maeda, Archipelago area as did Johnson (1949) in 



1955; Nagaya et al., 1955; Chiba 1956; Honjo et al., Bikini Lagoon and Tanaka (1956a) in the Izu 



1957. As Neocalanus robustior; Wilson, 1942; 1950; region of Japan. In view of its extreme scar- 



Tanaka, 1953; Brodsky, 1955; Tanaka, 1956a; Yamazi, ^ity in the present collections, it is apparently 



1958a ' CI ^ 



more of an insular and nearshore species in 



Vessel: Station Occurrence contradistinction to UncUnula clarivini, a wide- 



Hugh M. Smith __ 153 1 female, 4.08 mm. spread species ill the present collections. 



Do 178 1 female, 3.40 mm. 



Do 63 1 female (stage V), ,r .. , . • wt uu i .o^.x 



2 99 mm 3 fp Undinuta aarwim (Lubbock, 1860) 



males, 3:80-3.89 ^p^^^ 2^ ^^^^_ ^_^^ 

 mm. 



Stranger 34 1 female, 3.61 mm. Pacific records: Vervoort, 1946. Also, as Calanus 



_, 1 m. , • / j_ XI r, ^ darwini; Yamada, 1933a; Mori, 1937; 1942; Anraku, 



Remarks: The large size (greater than 3.4 jggg; Honjo, 1952; Nakai, 1952; Yamazi, 1953a; 1953b; 



mm.) and greatly produced genital segment 1953c; Anraku, 1954b; Chiba and Tsuruta, 1954; Ya- 



(fig. 21) of this species distinguishes it from mazi, 1954b; Motoda and Anraku, 1955; Nagaya et al., 



A^. gracilis. No males were found in the pres- 19^5; Yamazi, 1955a; 1955d; Chiba, 1956; Honjo et al., 



, oyyiTil o 1957; Yamazi, 1958b. As Undinula darivini; Wilson, 



samples. ^^^2- 1950 ; Tanaka, 1953; Johnson, 1954; Brodsky, 



1955; Rose, 1955; Tanaka, 1956a; Heinrich, 1957b; 



Undinula vulgaris (Dana, 1849) 1958a; Yamazi, 1958a; 1958b. 



Remarks : All female specimens of this spe- 



Paciflc records: Vervoort, 1946. Also, as Ca/onits cies have a group of inwardly projecting spines 



vulgaris; Yamada 1933a; Mori 1937; 1942; Chiba ^^ ^^^ ^^^^^^. ^.^^^ ^^ ^^^ ^^^^ thoracic segment 



1952c; Honjo, 1952; Anraku, 1954b; Tsuruta and ,„ ^^ ., , , . ,. n i-,  • j_i 



Chiba, 1954b; Motoda and Anraku, 1955; Chiba, 1956; («&■ D- Also characteristic of this sex IS the 



Honjo et al., 1957. As Undinula vulgaris; Wilson, shape of the genital segment, which m dorsal 



1942; Johnson, 1949; Wilson, 1950; Tanaka, 1953; view, is seen to narrow anteriorly (fig. 1). 



Johnson, 1954; Brodsky, 1955; Hida and King, 1955; The three forms of the female of this species 



Rose, 1955; Tanaka, 1956a; Yamazi, 1958a. (described by Sewell, 1929) are distinguished 



Vessel: Station Occurrence by the shape of the left fifth thoracic margin 



Satsiima 32 1 male, 2.04 mm. and spinulation of the proximal segments of 



T1 1 -n J.1 T7 i. /inj/.s J Tir-1 the first antennae. The right fifth thoracic 



Remarks: Both Vervoort (1946) and Wilson . . ,, ,, „ . , , , , 



margin in all three lorms is rounded and has 



Vessel: Station Occurrence (measurement in mm.; number of specimens in paren.) 



f. typica f. symmetrica f. intermedia 

 female female female male 



Hugh M. Smith 94 (1) 



Do 

 Do 

 Do 

 Do 

 Do 

 Do 

 Do 

 Do 



182 1.97(1) 



144 1.90(1) 1.87-2.04(7) 1.80(3) 



153 1.90-2.00(2) 1.80-1.90(7) present. 



178 present 1.84-1.90(20) 1.60-1.67(4) 



30 . 



31 . 

 29 . 

 63 . 



Stranger 34 



Orsom 10 



Horizon 32 



Satsuma 32 



2.00(2) 1.95-2.04(4) 



1.90-2.18(2) 2.00(1) (2) 



(1) 



1.90(1) 1.94-2.04(5) (8) 



2.04(1) 2.04(1) 2.07(1) (3) 



1.90(1) 1.73(1) 



2.04(1) 1.94-2.07(4) 



1.80(1) 1.84-1.90(5) 1.63(1) 



