Crustacean Fauna of South Africa. 185 
below, 4 rather strongly emarginate, 5 and 6 with hind-lobe deeper 
than anterior. Postero-inferior 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 2—3 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, Ist joint longest and stoutest, 3rd 2 2nd, 
flagellum ca. 50-jointed in ¢@, in 2 ca, 40-joited, every alternate 
joint broader distally and bearmg in ¢ 3, in 2 2 linear sensory 
filaments or calceoli (only 1 near the end of the flagellum), accessory 
flagellum distinct, 1-jointed. 
Second antenna either equal to or a trifle longer than Ist antenna, 
ultimate peduncular joint a little longer than penultimate, flagellum 
ca. 65-jointed in ¢, in 2 ca. 45-jointed, shortly setose but not 
calceoliferous. 
Lower lip, inner lobes obsolete. 
Mandibles, cutting-edge 7-dentate, the 2 anterior teeth longer than 
the rest, secondary cutting-edge 5-dentate in left, feeble and tridentate 
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. Rep. vol 29, pl. 75.) 
First gnathopod, 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 gnathopod, 5th distinctly shorter than 6th, 6th oblong, wider 
than, 5th, and a little wider distally than proximally, palm more 
transverse than in Ist 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 peraeopods, 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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