406 Annals of the South African Museum. 



median ones being large, the lateral portion bears 1 tubercle. 

 Ventrally the pleuron of 2nd segment does not hide the 7th peraeon 

 segment. 



The telson has 5 transverse rows of tubercles, the 1st with 4 

 small, the 2nd with 6 large, the 3rd with 6 small, the 4th and 5th 

 each with 4, of which the 2 subrnedian ones in the 4th row are 

 large, the rest small ; telsonic apex in $ with a narrow slit widening 

 anteriorly into a transverse oval foramen, in 5 entire, subacute, a 

 little upturned with 2 (in adult, 1 in young) small tubercles. Ventral 

 groove in both sexes very shallow and open. 



First antenna, 1st joint stout, 2nd half as long as 1st, 3rd slender, 

 longer than 2nd, flagellum equal to first 2 joints together, 18 

 joints. 



Second antenna, reaching to middle or end of 4th peraeon seg- 

 ment, 2nd-4th joints subequal, 1st shorter, 5th half as long again as 

 4th, flagellum a little longer than peduncle, 17-jointed. 



Epistome not greatly expanded distally, proximal end transversely 

 bifid, labrum with distal margin slightly convex, setose. 



Lower lip with short, broad lobes, apices rounded. 



Mandibles, cutting-edge 4-dentate, secondary cutting-edge in left 

 tridentate, spine-row with ca. 10 spines in left, ca. 15 in right, palp 

 stout, 1st and 2nd joints subequal, 3rd a little shorter. 



First maxilla, outer plate with 8-9 spines, inner ones denticulate, 

 inner plate with 4 setae. 



Second maxilla, outer and middle plates each with 11 denticulate 

 setae. 



Maxilliped, 2nd joint as long as inner plate, which has 1 coupling- 

 hook about the middle of the margin, 3rd, 4th and 5th joints 

 internally lobed. 



First peraeopod, middle of outer margin of 3rd joint with 1 out- 

 standing spine, 4th joint externally produced, with 3 spines on apex, 

 5th small triangular, inner margins of 4th-6th joints thickly furred, 

 inner margin of 7th minutely denticulate. 



Second to seventh peraeopods similar to 1st, but 5th joint oblong, 

 apex of 5th in 3rd-7th peraeopods with spines all round, apex of 4th 

 with 6 or more spines ; fur on 4th and 5th joints in 7th peraeopods 

 not so strong as on other peraeopods, absent on 6th which is sparsely 

 setulose. 



Male appendages on 7th peraeon segment short, stout, some 

 distance apart, apices blunt. 



Marsupial plates not overlapping, the brood developed in internal 

 pouches. 



