376 Annals of the South African Museum. 



Dr. Tattersall assures me that adult specimens, which I had sent 

 to him, are the same as his species, so that I am able to add the 

 description of the adult $ and 5 . Moreover I am able to confirm 

 his suspicion that this was the species which Krauss mistook for 

 tristcnse (Leach) ; if Dr. Tattersall had seen an adult $ (as was 

 Krauss' specimen) he would have had no difficulty with the 

 adjective " stumpfe," as applied to the telsonic apex, in Krauss' 

 diagnosis. 



Male. The tubercles are obsolete on the anterior peraeon seg- 

 ments and those that are present on the posterior segments are 

 less conspicuous than in the female. The swellings at the junctions 

 of the epimera and body segments are however as strong or even 

 slightly stronger. Tubercles on 4th pleon segment (not 3rd as in 

 Tattersall' s description) not quite as strong. Telson with 2 blunt 

 basal carinae and a median apical one, which latter is fainter in J 

 than in $ . The sides slightly concave, apex obtusely pointed. 



Uropods much larger proportionately than in 5 ; inner ramus 

 nearly reaching telsonic apex, apically subtruncate, with very fine 

 indentations on apical margin ; outer ramus reaching telsonic apex, 

 ovate, apex subacute, outer distal margin minutely serrulated. 



Apex of inner ramus of adult ? blunter than in Tattersall's figure 

 and more resembling that of $ . 



The following details apply to both sexes : 



Anterior margin of head with 2 semicircular indents on either side 

 of median point, the flat, straight keel between these indents and the 

 eyes rather strongly produced. 



The epimera, as compared with those of E. yigas, are more 

 separated, squarer, the antero-lateral angles less rounded. 



First antenna reaching to middle of 1st peraeon segment, 1st 

 joint rather less than twice as long as broad, 2nd as long as broad, 

 nearly ^ 1st, 3rd equal to -J 1st, flagellurn equal to 1st and 

 2nd peduncular joints together, 11-jointed. 



Second antenna reaching almost to end of 3rd peraeon segment, 

 lst-4th joints gradually increasing in length, 5th equal to 1st and 

 2nd together, flagellurn longer than peduncle, 17-jointed. 



Epistonie, width across proximal end nearly equal to that across 

 the arms, proximal margin flatly rounded, sides deeply concave. 



Mandibles, cutting-edge tridentate, secondary cutting-edge in left 

 bidentate, spine-row with 6 spines in left, 10 in right, palp with 

 1st joint stouter than 2nd and 3rd, 1st and 3rd subequal, 2nd 

 longer, 2nd and 3rd with strong fringe of doubly denticulate 

 setae. 



