Contributions to the Crustacean Fauna of South Africa. 237 



The Fourth Pcraeopod is a little shorter than the preceding ones. 

 The basos 2^ times as long as broad ; ischios two-thirds length 

 of basos ; meros a little shorter and expanded distally ; carpus as 

 long as meros, rather swollen, anterior margin with 3 apical setae 

 and one further back, posterior margin with 6 very stout and long 

 spines and a few finer setae ; propodos a little longer than and 

 at right angles to carpus, distal end prolonged externally beyond the 

 articulation with the dactylos, anterior margin with an apical tuft 

 and a few setae behind, posterior margin with 3 stout spines on a 

 slightly convex palm and a few fine setae ; dactylos shorter than and 

 at right angles to propodos, curved, with secondary unguis, an 

 outer apical tuft of setae and a few very fine ones on inner margin. 

 The female differs from the male in the following points : the carpus 

 is less swollen ; the propodos more slender, the length being 3 times 

 the breadth instead of twice ; the dactylos less curved ; the convex 

 palm is hardly developed and the spines on both carpus and 

 propodos are more slender. 



The Brood-pouches in the female are developed on the 2nd, 3rd 

 and 4th peraeon segments. 



The Fifth, Sixth and Seventh Peraeopods. The fifth is slightly 

 longer than the preceding ones and the sixth and seventh are longer 

 than the fifth. They agree with each other except in the width of 

 the basos ; this in the 5th and 6th legs is one-half the length, in the 

 7th two-thirds. The ischios joint is three times as long as broad ; 

 the meros a little more than two-thirds the length of the ischios, 

 with a distal prolongation on posterior margin ; carpus joint nearly 

 as long as ischios, its length nearly 4 times its breadth ; propodos 

 as long as carpus but more slender ; dactylos half as long as pro- 

 podos, with secondary unguis, apical tuft of setae and a few fine 

 ones on the inner margin. 



The setae of all the legs, but especially those of the last three 

 pairs, are covered with numerous short-stalked Infusoria. 



The Male appendages on the seventh peraeon segment are curved 

 towards one another, not swollen at the base, with blunt apices and 

 a few hairs, chiefly on the inner margin. 



The First Pleopod. Protopodite rectangular ; exopodite and 

 endopodite lanceolate, the former rather narrower and more pointed 

 than the latter, both with a few plumose setae on outer margins and 

 apices. 



The Second Pleopod. Protopodite subtriangular with 2 setae on 

 its inner distal apex. First joint of exopodite produced proximally 

 into a rounded lobe ; both margins gently convex, the inner with 



