166 Annals of the South African Museum. 
Telson suboval, longer than broad, the rounded apex with 2 small 
submedian spines anda small lobe between them, 2 spines on rounded 
lateral angles. 
First antenna shorter than second, Ist joint equal to 2nd and 3rd 
together, flagellum longer than peduncle, 32-jointed, not calceoliferous. 
Second antenna, ultimate and penultimate joints subequal, flagellum 
ca. 84-jointed, not calceoliferous. 
Upper lip rounded, broader than long, distal margin nearly straight, 
setulose. 
Lower lip, outer lobes ovate, setose, inner lobes well-marked, 
rounded. 
Mandibles, cutting-edge straight with one tooth at one end and two 
at the other, secondary cutting-edge in left 4-dentate, in right repre- 
sented by a stout spiniform deeply bifid process, spine-row with 5 
spines, palp long, 2nd joint nearly straight, 3rd joint equal to 2nd. 
First maxilla, inner plate with 2 apical setae and some very fine 
setules on inner margin, outer plate with 9 spines, 2nd joint of palp 
apically subacute, 4 setae on outer margin and numerous setae on inner 
distal margin. 
Second maxilla, outer and inner plates subequal in width. 
Maxilliped as figured by Sars for H. longicaudatus Boeck. 
First gnathopod, 5th joit produced in a fairly broad lobe, not quite 
reaching end of inferior margin of 6th, spinose, 6th joint ovate, palm 
setose, longer than inferior margin, defined by a stout palmar spine, 
finger as long as palin. 
Second gnathopod similar, but 5th joint with a longer and narrower 
process, 6th joint more elongate (twice as long as wide), palm longer 
than inferior margin, but not so much as in Ist gnathopod, defined by 
a palmar spine. 
First and second peraeopods, none of the joints expanded, 5th joint 
shorter than 4th or 6th which are subequal, 6th joint rather narrower 
than 4th or 5th, all with long setae, 7th as long as or a little longer 
than 6th. 
Third peraeopod, 2nd joint somewhat pear-shaped, broader proxi- 
mally, front margin straight, both front and hind margin setose, distal 
joints lost. 
Fourth peraeopod, 2nd joint not so pear-shaped, front margin convex, 
4th joint longer than 6th, somewhat expanded on hind margin, 6th 
joint longer than 5th, 7th joint equal to 4th. 
Fifth peraeopod, 2nd joint strongly expanded, twice as wide proxi- 
mally as distally, hind margin faintly crenulate, setose, distal joints 
lost. 
