reported by Shirshov (1938). Grice (1962) reported S. 

 abyssalis var. pygmaeus, which was probably S. 

 longicornis. Scotto di Carlo (1968) and Hure and Scot- 

 to di Carlo (1968, 1969) reported S. abyssalis var. 

 pygmaeus which they later (Hure and Scotto di Carlo, 

 1971) equated with S. parabyssalis Park. Hughes' 

 (1968) specimens were examined and found to be S. 

 longicornis. G. A. Heron (pers. commun.) identified 

 S. longicornis (females, males, and juveniles) from 

 Weather Station "P" in the northeast Pacific, from 

 four 55-m depth intervals between 220 and 440 m; six 

 females were examined in the present study. 



Arctic Ocean 

 Central: Bogorov (1946a), 10-750 m. — Brodsky 



(1950, 1957), 25-3,000 m. 

 Eurasian Basin: Sars (1900), 100-500 m. — Mra- 



zek (1902), 0-100 m. —Shirshov (1938), 3-1,000 



m. —Grice (1962), 110 m. 

 Canadian Basin: Bogorov (1946b), 0-300 m. — 



Brodskv and Nikitin (1955), 0-3,260 m. —Hughes 



(1968), 25-185 m. — Vidal (1971). —Present 



study, 80-2,500 m. 

 Pacific Ocean 

 Northeast: von Vaupel-Klein (1970), 0-1,200 m. 



—Present study, 220-440 m. 

 Atlantic Ocean 

 Northeast: Farran (1926), 200-2,700 m. 

 East: Present study. 

 Mediterranean Sea: Scotto di Carlo (1968), 200- 



1,000 m. —Hure and Scotto di Carlo (1968, 



1969, 1971), 50-1,000 m. —Grice (1971), 750- 



1,400 m. 

 Caribbean Sea: Park (1970), 200-950 m. 



Spinocalanus abyssalis has been reported from the 

 Arctic without size indications: Bernstein (1934) and 

 Khmyznikova (1936) for the Kara Sea; Johnson 

 (1963a) and Minoda (1967) for the Central Arctic; and 

 Jaschnov (1948), repeating the Kara Sea and Sars' 

 Polar Basin records. Jaschnov's figures are copied 

 from Sars' (1901, 1903) figures of S. brevicaudatus. 

 These records may represent S. longicornis, but they 

 may also include 8'. elongatus or other species. 



Norman's (1905) reference to specimens of S. 

 longicornis obtained from Sars could be either to Arc- 

 tic S. longicornis or Norwegian S. brevicaudatus. 

 Ostenfeld (1909) reported S. longicornis from the 

 Atlantic (identified by Farran) and the North Sea 

 (identified by T. Scott); both records could include S. 

 brevicaudatus. 



Von Vaupel-Klein's (1970) record of a male S. 

 longicornis from the northeast Pacific is considered 

 here (see also S. abyssalis). 



(3. Spinocalanus schaudinni Mrazek, 1902) 



See Spinocalanus longicornis Sars, 1900. 



4. Spinocalanus magnus Wolfenden, 1904 



(Figures 35-42, 150) 



Spinocalanus magnus Wolfenden, 1904, p. 118. — Far- 

 ran, 1905, p. 30-31, pi. 3, fig. 1-12. —Wolfenden, 

 1906, p. 41-43, pi. 14, fig. 1-5. -van Breemen, 1908, 

 p. 29, fig. 29. —Wolfenden, 1911, p. 216-217, fig. 8; 

 pi. 25, fig. 3-5. -Sars, 1924, 1925, p. 33-34, pi. 9, 

 fig. 8-15. —Rose, 1933, p. 85, fig. 43. —Davis, 1949, 

 p. 22-23, fig. 25-26. —Brodsky, 1950 (part), p. 123- 

 124, fig. 43; "female T" only. —Farran and Ver- 

 voort, 1951a, p. 2-3, fig. 2b, g. — Tanaka, 1956, p. 

 391-392, fig. 15. —Grice, 1971, p. 275-280, fig. 1, 

 3G-H. 



Spinocalanus latifrons Sars, 1907, p. 5. 



Spinocalanus heterocaudatus Rose, 1937, p. 151-157, 

 fig. 1-3. —not Rose, 1942, p. 315-318, 15 figs. 



Spinocalanus pacificus Mori, 1942, p. 568, pi. 14, fig. 

 1-6. 



Spinocalanus spinipes Brodsky, 1950 (part), p. 126- 

 127, fig. 45; male only. 



Type SPECIMEN: Unknown. 

 Type Locality: Northeast Atlantic, 500-1,800 m. 

 Material StlidieD: 2 females (2.77, 2.90 mm), sample 

 2 (Table 3); 1 female (2.1 mm), sample 27; 2 females 

 (1.98, 2.05 mm), sample 30; 36 females (1.95-2.20 mm, 

 mean = 2.08 mm) and 1 male (1.80 mm), sample 31; 3 

 females (2.2-2.4 mm), sample 33; 1 female (2.32 mm), 

 sample 34; 6 females (1.87-2.42 mm, mean = 2.10 

 mm), 3 female stage V (1.85, 1.92, 1.95 mm), and 4 

 male stage V (1.88, 2.00, 2.00, 2.02 mm), sample 41. 



Description 



PI Ri with 3 inner setae; P2 Ri2 with 1 outer seta. 



Female,— Length 1.87-3.1 mm (Figs. 35-38). 

 Prosome in dorsal view relatively slender, long ovoid. 

 Head rounded in dorsal view, in lateral view with gen- 

 tle, uneven forward slope. Th4 and Th5 separate; Th5 

 lateral corners prolonged, variable, reaching about 

 midgenital segment; projections sometimes more or 

 less closely surrounding genital segment (Fig. 38). 

 Thl-Th4 without lateral spinules. Prosome length 3'/* 

 times urosome. Area of attachment proximal to 

 genital segment without dorsal spinules. Genital seg- 

 ment about as long as wide, protruding ventrally one- 

 half depth of rest of urosome; caudal rami length 

 about 1^/3 times width, left ramus longer and wider 

 than right. Caudal setae also asymmetrical: left ter- 

 minal seta second from inner, very thick, length ex- 

 ceeding 3 mm. 



Al reaching midcaudal rami; terminal segments 

 (Fig. 150) of moderate length and width. Apparent | 

 deviations: I-2s; XV-ls; remainder as Table 4. 



A2 Rel without setae. 



Mn palp Without setules on inner distal B2; Ril 



26 



