duced; Mxp Ri2 length more than 1 Vi times 

 Ril. Male: Length less than 1.5 mm . . 

 10. M. heronae, new species 



Female: Length greater than 2.0 mm; Th4 and 

 Th5 separate; inner caudal seta reduced; Mxp 

 Ri2 length less than 1 ' a times Ril. Male: 



Length greater than 1.5 mm (7) 



7. Female: I'rosome robust ovoid, Th5 lateral cor- 

 ners reaching midgenital segment; PI Re2 

 outer spine extending two-thirds length oi 

 Re3; P2-P4 Re3 spiniform distal process about 

 equaling size of Re3 outer distal spine; P2-P4 

 Re terminal seta with less than 75 teeth. 

 Male: Prosome robust ovoid; P5 left Rel 

 longer than Re2 2. M. nudus 



Female: Prosome ovoid, Th5 lateral corners 

 reaching beyond midgenital segment; PI Re2 

 outer spine reaching distal edge of Re3; P2-P4 

 Re3 spiniform distal process about one-half 

 size of Re3 outer distal spine; P2-P4 Re ter- 

 minal seta with more than 75 teeth. Male: 

 Prosome elongate ovoid; P5 left Re2 longer 

 than Rel 9. M. suicifrons 



1. Mimocalanus cultrifer Farran, 1908 



(Figures 164-168) 



Mimocalanus cultrifer Farran, 1908, p. 23-24, pi. 1, 

 fig. 5-9. —Rose, 1933, p. 86, fig. 47. —Davis, 1949, 

 p. 24. —Farran and Vervoort, 1951b, p. 2-3, fig. la- 

 b, d. —Vervoort, 1957, p. 42-44, fig. 11-15. — ?Grice, 

 1971, p. 278-279, fig. 3C-D. 



Type SPECIMEN: Holotype, female, BM 1908.7.6.4. 

 Type LOCALITY: Northeast Atlantic, 720-1,800 m. 

 Material Studied: 1 female (1.57 mm), sample 37 

 (Table 3). 



Description 



PI Ri with 2 inner setae; P2 Ri2 with no outer seta; 

 P3-P4 Ri3 with 1 outer seta. 



Female.— Length 1.0-1.70 mm(?) (Figs. 164, 165). 

 Prosome in dorsal view fairly robust ovoid; head 

 rounded, with slight bulge. In lateral view with fairly 



Mimocalanus cultrifer, female 



Figure 1B4. — Habitus, dorsal view; sample .'17; scale A. 

 Figure 1ti.5.— Habitus, lateral view; sample .')7; scale A. 

 Figure 166.— PI; sample 37; scale I). 

 Figure 167.— P2; sample .37; scale D. 

 Figure 168.— P4; sample .37; scale D. 



68 



