434 Annals of the South African Museum. 



not greatly expanded, epipod with outer margin angular not rounded 

 as in /. marina, reaching to middle of 5th joint. 



Peraeopods all similar, the posterior ones rather longer, the first 

 apparently uniunguiculate, the rest biunguiculate. 



First pleopods elongate, outer angle of peduncle produced into a 

 long thin point exceeding in length the rami, which are well developed 

 with blunt setose apices. 



Second pleopods, peduncle ovate, apically acute, setose on apical 

 distal margin, outer ramus large, bilobed, near apex of peduncle, 

 inner rarnus (= penial filament) very bulbous at base, the distal 

 portion narrowing to a long thread nearly twice length of pleopod. 



Third pleopods, inner ramus with 2 apical setae, outer ramus 

 about as long, 2-jointed, the second joint setose. 



Fourth pleopods, inner ramus with 2 apical setae, outer ramus 

 shorter, narrow, pointed, 1-jointed. 



Fifth pleopods, small, only one ramus (with apical setae ?). 



Uropods short, peduncle stout, setose around the bases of the 

 rami which are elongate lanceolate, the inner longer than the 

 outer. 



Length: 2mm.; breadth: -5mm. 



Colour : Whitish. 



Locality: Sea Point, near Cape Town. 29/11/13. (K.H.B.) 1 3 

 (S.A.M. No. A2633.) 



Though assigned to the genus Jaera this species is not in full 

 accord with the definition of that genus or the figures of J. marina 

 given by Sars. Firstly, the presence of a distinct scale on the third 

 peduncular joint of the second antennae brings it into harmony with 

 the great majority of the genera in the family ; Jaera (as defined by 

 Sars) and Jaeropsis being the only genera in which it is lacking. 



Secondly, the maxilliped resembles that of Janira, and differs 

 completely from that of Jaera marina in having an angular outer 

 margin to the epipod. 



Thirdly, the first pleopods are quite peculiar, but as Tattersall (I.e.) 

 has shown that this pair of pleopods differ very considerably in 

 Jaera marina and Jaera nordmanni, two species otherwise very 

 hard to separate, this feature has little importance in deciding on the 

 systematic position of the present species. These pleopods approxi- 

 mate somewhat to those of Janira, as do also the third pleopods. 



Fourthly, the elongate, parallel-sided body is rather different from 

 the more oval shape of the typical species. 



However, the shape of the head, the peraeon segments without 

 distinct epimera, the short first antennae and the uropods all 



