Description 



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



Female. — Length 3.7-4.7 mm. Prosome in dorsal 

 view slightly robust ovoid. Head somewhat truncate 

 in dorsal view, in lateral view with abrupt forward 

 slope. Th4 and Th5 separate; Th5 lateral corners 

 prolonged, reaching to or slightly beyond midgenital 

 segment (Sars, 1924, fig. 15). Thl-Th4 without lateral 

 spinules. Prosome length 4 '/a times urosome. 



Al incomplete on specimen examined; Al scarcely 

 exceeding length of prosome, according to Sars. 



Mxp without spine-comb on Bl-2. Ri4-5 outer setae 

 missing on specimen studied. Ri5 inner edge without 

 spinules. 



PI as shown by Sars, without posterior surface 

 spines on Re3. 



P2-P4 Bl surface very setulose, as shown by Sars; 

 specimen examined lacked Re2-3 and Ri. P2 Rel out- 

 er spine small, straight, not sharply curved. 



Male. — Length 4.4-5.08 mm. Prosome anterior 

 irregular in dorsal view, posterior somewhat rounded; 

 in lateral view with fairly abrupt forward slope. Ce 

 and Thl partly fused. Prosome length slightly over 2 

 times urosome. Anal segment not reduced, two-thirds 

 length of caudal ramus. 



Al incomplete on specimen studied. Mxp with 

 thick, not expanded, hirsute terminal setae; Ri4-5 

 with reduced outer setae. Ri5 inner edge without 

 spinules. 



PI Rel outer spine very wide, straight; no posterior 

 surface spines on Re3. 



P2-P3 Re and Ri missing on specimen examined. P4 

 Bl without inner seta; outer surface with proximal 

 setules and distal spines. P4 Re missing. P4 Ri2 

 posterior surface with 1 proximal row and 1 distal 

 cluster of spines; Ri3 with 2 clusters of spines. 



P5 biramus, about as described by Grice and 

 Hulsemann (1967), except perhaps longest basal 

 segments on left (left-handed) rather than right. 

 Anterior/posterior slope of distal B2 edges suggesting 

 this possibility; however, orientation should be reex- 

 amined in situ. Each Re with small bladelike terminal 

 seta in addition to long terminal seta shown by Grice 

 and Hulsemann. 



Remarks 



Sars (1920) briefly described S. validus; his record 

 of finding the species at "Stn. 1851" must have been 

 an error, since S. validus is not on that station's list of 

 species, and the station is not mentioned in 1925. 



Rose's (1933) description and records are repeated 

 from Sars. 



Grice and Hulsemann (1967) briefly described the 

 male of S\ validus, but they also found females (un- 

 published records); a male is in the USNM (113512) 

 and was examined in the present study. 



Distribution 



There have been only three additional reports of S. 

 validus, all of which are summarized below: 



Pacific Ocean 



Indo-Pacific: Vervoort (1946), 653-1,000 m. 

 Indian Ocean 

 West: Grice and Hulsemann (1967), 350-2,000 

 m. 

 Atlantic Ocean 

 Northeast: Sars (1920; 1924, 1925), 0-1,400 m. 

 —Grice and Hulsemann (1965), 1,500-4,000 

 m. — Vives (1970), 300-700 m. 



13. Spinocalanus angusticeps Sars, 1920 



(Figure 85) 



Spinocalanus angusticeps Sars, 1920, p. 3. — Sars, 

 1924, 1925, p. 30-31, pi. 8, fig. 1-9. — Farran 

 and Vervoort, 1951a, p. 2-3, fig. 3a-b, d. — Tanaka, 

 1956, p. 392-394, fig. 16. 



Spinocalanus longipes Tanaka, 1956, p. 394-395, fig. 

 17. —Grice and Hulsemann, 1967, p. 21, fig. 26- 

 27. 



Spinocalanus sp. —Wheeler, 1970, p. 9, fig. 23-26. 

 Not Spinocalanusl sp. Johnson, 1963a. 



Type Specimens: Syntypes, females (2.10 mm), Mu- 

 see Oceanographique de Monaco (Belloc, 1960); on 

 slides F5037, F5047, OSLO. 

 Type Locality: Northeast Atlantic, 0-2,000 m. 



Spinocalanus angusticeps, female 

 Figure 85.— P3; sample 13; scale C. 



42 



