212 Annals of the South African Museum. 



GEN. ANTAKCTQEUS, zur Strassen. 

 ANTAECTUBUS KLADOPHOROS, Stebbing. 



(Plate XVIII. B.) 



1908. Antarcturus kladophoros, Stebbing, S.A. Crust, pt. 4, p. 53, 

 pi. 32 (where also a discussion of the genus will be 

 found). 



Stebbing's description was based on a single female. The 

 following is a description of the male. 



Body narrow and cylindrical, without setae. 



Head, anterior margin with semicircular excavation, antero-lateral 

 angles blunt, shorter than diameter of the large and prominent eye, 

 inferior margin straight, without cheeks but with 2 small teeth, 



2 low blunt tubercles between the eyes and behind these 2 long 

 spines, knobbed at ends and standing on broad boss-like bases. 

 Peraeon segments 1-3 not quite as long as head, subequal, covered 

 with scattered granules, 1st not produced downwards and forwards. 

 Fourth segment as long as head and first 3 peraeon segments 

 together, granular dorsally and ventrally, the largest of the granules 

 tooth-like and pointing backwards, 2 large teeth on posterior margin 

 curving backwards, postero-lateral angles produced into rounded 

 lobes. Sixth and seventh segments rather shorter than fifth, all 

 three granulate. 



Side-plates distinct, 5th 6th and 7th triangular, 2nd and 3rd 

 small and not prominent, 1st and 4th forming downwardly produced 

 rounded lobes. 



First antenna, 1st joint without spine, flagellum longer than 

 peduncle, with apical setae and 20 marginal filaments in pairs. 



Second antenna, 1st joint with 1 blunt tubercle, 2nd joint with 



3 on upper surface, 3rd joint with 3 on upper surface and 6-7 on 

 lower surface, 4th joint shorter than 5th, both long and slender 

 with a few setules, flagellum two-thirds fifth joint, 6-jointed, last 

 joint with small apical tooth. 



Upper and lower lips as in ? . 



Mandibles as in $ , spine-row with 3 spines, molar strongly 

 denticulate. First maxilla, outer plate with 11 spines, inner with 3 

 (2 long and 1 short) plumose setae. 



Second maxilla, outer plate with 5 plumose setae, middle one with 

 3, inner plate with numerous plumose setae. 



Maxillipeds as in ? , inner plate squarely truncate, with plumose 

 setae but no coupling-hook, epipod obovate reaching to end of 

 2nd joint. 



