Crustacean Fauna of South Africa. 185 



below, 4 rather strongly euiarginate, 5 arid 6 with hind-lobe deeper 

 than anterior. Postero-iuferior angle of pleon segment 1 rounded, of 

 2 quadrate with a small point, posterior margin above straight, of 3 

 rounded-quadrate with small acute point, above which the posterior 

 margin bulges rather strongly. 



Telson cleft for | | of its length, outer margins slightly sinuous, 

 inner margins straight and contiguous, apices of lobes sloping away 

 externally from inner apical angle, cut into 5-8 teeth in the adult, 

 fewer in young specimens (one large <$ has 11 teeth), the intervening- 

 notches either with or without very fine short setules. 



First antenna extending in <$ to end of peraeon, in $ to end of 5th 

 or 6th peraeon segment, 1st joint longest and stoutest, 3rd 2nd, 

 flagelluni ca. 50- jointed in ^, in $ ca. 40- jointed, every alternate 

 joint broader distally and bearing in <$ 3, in ? 2 linear sensory 

 filaments or calceoli (only 1 near the end of the flagelluni), accessoiy 

 flagellum distinct, 1- jointed. 



Second antenna either equal to or a trifle longer than 1st antenna, 

 ultimate peduncular joint a little longer than penultimate, flagellum 

 ca. 65-jointed in <$ , in ? ca. 45-jointed, shortly setose but not 

 calceoliferous. 



Lower lip, inner lobes obsolete. 



Mandibles, cutting-edge 7-deutate, the 2 anterior teeth longer than 

 the rest, secondary cutting-edge 5 -dentate in left, feeble and tri dentate 

 in right, spine-row with 9 spines, palp long, 3rd joint scarcely as long- 

 as 2nd. 



First maxilla, inner plate with ca. 20 setae, outer plate with 10 

 spines, palp with 9 teeth and several seta on apex of 2nd joint. 



Second maxilla and maxilliped as figured by Stebbing for Atyloides 

 australis (Miers). (Challeng. Kep. vol 29, pi. 75.) 



First guathopod, 5th a little shorter than 6th, 6th wider than 5th, 

 ovate, palm oblique, as long as hind margin, defined by a transverse 

 row of 3 setae, finger serrate on inner margin. 



Second guathopod, 5th distinctly shorter than 6th, 6th oblong, wider 

 than 5th, and a little wider distally than proximally, palm more 

 transverse than in 1st gnathopod, shorter than hind margin, defined 

 by a row of 3 setae, hind margin with bunches of setae, finger serrate 

 on inner margin. 



First and second pei-aeopods, 4th and 5th joints subequal, 6th 

 longer than either, its hind margin with 7 pairs of spines, outer 

 margin with 4 pairs of spinules, finger broad basally, rather strongly 

 curved, with a seta at inner apex. 



Third to fifth peraeopods, 5th peraeopod longer, 2nd joint in all 



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