166 Annals of the South African Museum. 



Telson suboval, longer than broad, the rounded apex with '2 small 

 submedian spines and a small lobe between them, 2 spines on rounded 

 lateral angles. 



First antenna shorter than second, 1st joint equal to 2nd and 3rd 

 together, flagellum longer than peduncle, 32-joiuted, not calceoliferous. 



Second antenna, ultimate and penultimate joints subequal, flagellum 

 oa. 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 spiuiform 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 Avith 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 guathopod, 5th joint 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 palm. 



Second guathopod similar, but 5th joint Avith 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 1st 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- 

 inally as distally, hind margin faintly crenulate, setose, distal joints 

 lost. 



