135 



Spinocalanus brevicaudatua 



Figure 130.— Female, Mxp Bl-2; sample 17 (Table 3); scale D. 



Figure 131.— Female, P2; sample 17; scale D. 



Figure 132.— Male, PI, left; sample 20; scale D. 



Figure 133.— Male, P2. left; sample 20; scale D. 



Figure 134.— Male, P3, left; sample 20; scale D. 



Figure 135.— Male, P4, left; sample 20; scale D. 



Figure 136.— Male, P5; sample 20; scale D. 



female (1.45 mm), sample 25; 1 female (1.47 mm), 

 sample 26; 1 female (1.68 mm), sample 30; 1 female 

 (1.95 mm) and 1 male (1.90 mm), sample 31; 1 female 

 (1.85 mm), sample 33. 



Description 



Pi Ri with 2 inner setae; P2 Ri2 with 1 outer seta. 



Female. — Length 1.40-2.4 mm. Prosome in dorsal 

 view ovoid, head slightly truncate. In lateral view 

 with fairly abrupt forward slope. Th4 and Th5 

 separate; Th5 lateral corners rounded, not prolonged; 

 Thl-Th4 without lateral spinules. Prosome/urosome 

 ratio variable; prosome 3-4 times urosome. Genital 

 segment as long as wide, protruding ventrally one-half 

 depth of rest of urosome. Caudal rami as long as wide, 

 symmetrical. Caudal setae symmetrical. 



Al exceeding caudal rami by about 2 segments; ter- 

 minal segments (Fig. 157) of moderate length and 

 width. Most segments damaged on material studied. 



A2 Rel with 2 setae. 



Mx2 posterior surface of lobe-5 base apparently 

 without spines. 



Mxp (Fig. 130) with typical number of setae; Bl 

 surface with few rows of setules. B2 with transverse 

 spine-comb about one-third length on outer surface; 

 inner longitudinal row of stiff hairs. Ri4-5 outer setae 

 nude, bladelike, tapering toward each end; not as 

 shown by Sars (1901). Ri5 with inner spinules. 



PI similar to that in S'. elongatus, Re3 posterior sur- 

 face without spines. Sars' (1901) figure lacks 1 inner 

 seta on Re3. 



P2 (Fig. 131) Bl outer surface with few spinules; in- 

 ner posterior surface with setules. P3 Bl outer surface 

 with few setules, spinules, and weak spines; inner 



54 



