Contributions to the Crustacean Fauna of South Africa. 409 



First peraeopod, 3rd joint nearly equal to 2nd, with a group of 

 spinules on outer distal margin, 4th rather strongly expanded on outer 

 apex, outer apical angle with 1 long seta, inner apical angle of 6th 

 joint with 1 long seta, both inner and outer margins of all the joints 

 setulose, the inner margins more strongly so than the outer. 



Second peraeopod, 4th, 5th and 6th joints more strongly furred on 



inner margin. 



Seventh joint in all peraeopods with 3 lamella-like teeth, secondary 



unguis strong. 



Male appendage on 7th peraeon segment long, narrow, the distal 

 half divided into two slender tapering portions. 



First pleopod, lobes subequal in length, with long plumose setae. 



Second pleopod rather longer than 1st, $ stylet arising from base 

 of inner ramus, 2^ times length of ramus, stout basally but tapering 

 to a fine point, at about half its length doubled on itself. Both 1st 

 and 2nd pleopods with 2 hooked spines on inner apex of peduncle. 



Third pleopod longer than 1st or 2nd, outer ramus unjointed. 



Fourth and fifth pleopods inner ramus strongly plicate, outer 

 ramus membranous, without plicae, 2-jointed, rather obscurely so in 

 5th, squamose projections in 5th small, outer margin of 4th nonsetose, 

 of 5th \vith very fine setules. 



Uropods extending slightly beyond telsonic apex, subequal, inner 

 ramus ovate, apex rounded-subtruncate, distal margin indistinctly 

 serrulate, setose, outer ramus ovate, apex rounded, outer distal 

 margin indistinctly serrulate, whole outer margin setose. 



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



Colour : Brownish, a lighter longitudinal median patch on peraeon 

 segments 4-7 and extending on to the process on pleon, portions of 

 the telson and uropods also lighter. 



Locality: Port Shepstone, Natal. 23/12/12. (K.H.B.) 1 $. 

 Low-tide. (S.A.M. No. A2716.) 



In one character this species differs from all other Sphaeromids 

 known to me : the male appendages on the 7th peraeon segment 

 instead of being separate throughout their length, are here fused in 

 the basal half. 



But for the Hemibranchiate character of the 4th and 5th pleopods 

 this species might be placed in the genus Dynamenella. On the 

 other hand, it cannot be included in any of the Hemibranchiate 

 genera hitherto established on account of the unjointed outer ramus 

 of pleopod 3 (Sphaeroma and Hemisphaeroma being the only genera 

 presenting this feature). 



A new genus is thus unavoidably necessary. This genus together 



