Contributions to the Crustacean Fauna of South Africa. 429 



" limbe posterieur " entire, the curved process at exterior angle strong. 

 Ovarian bosses absent or not yet developed. Epimera conspicuous, 

 extending whole length of segments. Pleou of G distinct segments, 

 pleura entire, only the 4th and 5th strongly produced as lamellae, 5th 

 segment embracing 6th, which is broader than long. 



Antenna 1 3-joiuted, 1st and 2nd joints stout, 3rd minute, tipped 

 with setae. 



Antenna 2 5-jointed, 1st and 2nd joints stout, 3rd and 4th elongate, 

 5th minute, tipped with setae. 



Maxilliped, anterior portion quadrangular, exterior angle rounded, 

 margins setose, posterior portion more semicircular than triangular, 

 inner apical angle acute, ending in a small spine, inner margin setose, 

 palp absent. 



Only the first pair of marsupial plates meet in the centre ; the 

 others apparently are not fully developed. First pair with the 2 

 lobes subtriangular and about equal in size, overlapping ridge entire 

 and smooth. Inner and hind margins of 2nd-5th pairs and inner 

 margin of the distal lobe of 1st pair setose. 



Pleopods probably not fully developed, inner ramus broadly lanceo- 

 late with acute apex, larger than outer ramus, which is quadrate, with 

 the postero-exterior angle a little produced. 



TJropods biramous, attached to the lateral angles of 6th pleon 

 segment, rami subequal, ovate, apical margins finely setulose. 



Male. Nearly parallel-sided, anterior margin of head convex. 

 Peraeou segments all distinct, laterally somewhat pointed, 1st with 

 the median ventral papilla pointed, segments 2-6 with the papilla 

 rounded, with a small pit in the middle. Pleou segments all distinct, 

 pleura developed as blunt lamellae, the 5th segment embracing 6th, 

 which is as broad as long, ovate and cleft nearly to the base. 



Pleopods on segments 1-5 lobe-like. 



Uropods lamellate, uniramous, obovate, extending a little beyond 

 apex of 6th segment, apical margins finely setose. 



Length: $ 7'5 mm., 3mm.; breadth: 9 4mm., $ 1mm. 



Colour : In spirit yellowish-white. 



Locality: Off Buffalo River, East London. 300 fathoms. 1 

 and ? . s.s. " Pieter Faure." 24/4/01. (S.A.M. No. A2277.) 



Host : Munida sancti-pauli Henderson. In the branchial cavity. 



GEN. HEMIARTHRUS Giard & Bonn. 



1843. Phryxus Rathke, Nova Acta Ac. Leop. -Carol. Naturae Curios. 



p. 40. 



