On some South-African Phyllopoda. 21 



antennæ, which thus forms a kind of chela curving back- 

 wards, has the upper edge (in the normal attitude of the 

 animal) minutely denticulate and terminating in a projecting 

 corner, whereas each of the digitiform processes exhibits 

 at its base an obtuse prominence pointing in the opposite 

 direction. The processes are of rather unequal length, the 

 lower one (in the normal attitude of the animal) being 

 about 1 'b longer than the upper, and having its outer part 

 gently curved. 



Of the oral parts, the labrum and the mandibles are 

 easily observable, and exhibit quite a normal structure. 

 The maxillæ, on the other hand, cannot be examined without 

 dissection. The anterior maxillæ (fig. 7), as usual, consist 

 of a thick basal part and an incurved, very mobile lamella 

 carrying on the straight, distal edge a regular series of 

 slender, biarticulate setæ curving inwards to the oral orifice. 

 The posterior maxillæ (fig. 8) are very small, forming 2 

 simple, rounded lobes, which carry on the end a number of 

 short densely ciliated setæ. 



The branchial legs, as in all true Branchipodids, number 

 11 pairs. They increase in size successively from the 1st 

 to about the 5th or 6th pair, from thence diminishing 

 somewhat more slowly posteriorly, the 1st pair being much 

 the smallest. In all pairs (see figs. 9, 10, 11) the following 

 parts are to be distinguished; the stem proper, or endopodite, 

 the exopodite, the epipodite, and the basal plate. The 

 endopodite is rather broad and flattened, with the anterior 

 face somewhat convex, the posterior concave. It terminates 

 in a broad, subangular lobe fringed with short, ciliated setæ. 

 In the middle pairs (fig. 10) the inner corner of this lobe 

 is, moreover, armed with 4 short spiniform, projections 

 curving outwards. Above this lobe, the inner edge of the 



