﻿4 Annals of tlic South African Musemn. 



outer lateral margins are convex, with no such concavity as is shown 

 in the figures of P. jcffrcysii and P. spinosus. In P. paradoxus the 

 sides of the telson are sinuous in the figure, hut in the description 

 the telson is said to he " hroadly emarginate hehind and excavate on 

 the sides." 



The first antennae have a first joint rather longer than the second, 

 with an apical tooth on one side and one below the apex on the 

 other ; the third joint is rather shorter than the second ; the prin- 

 cipal flagellum is subequal in length to the peduncle, its fii'st half 

 broad, with very long plumose setae, the whole nearly twice as long 

 as the slender companion flagellum. The peduncles are perhaps 

 scarcely as long as the eyes. Benedict, in comparing P. gilli with 

 P. paradoxus, remarks that in the latter species these peduncles do not 

 reach the corneae, while in the former they pass them. But it may 

 be asked whether he is not comparing the peduncles of his own 

 species fully extended with those of Milne-Edwards' figured in 

 their natural geniculate position, which shows the second joint end 

 on, thus giving no idea of its actual length. 



The long third joint of the mandibular palp is partially fringed 

 with setules. The middle plate of the first maxillae is fringed with 

 numerous strong spines, the narrow one-jointed "palp" has six 

 slender spines at the apex. The long sinuous apical joint of the 

 second maxillae, broad at its base, is drawn out to a fine point at 

 the lightly armed apex. In the third maxillipeds the third joint is 

 armed with a long row of teeth, the fourth joint has two teeth at the 

 outer apex, the sixth joint is elongate, carrying the short spinose 

 seventh at its end, with no suggestion of the chelate character which 

 makes these appendages notable in Pyiochelcs. 



The first pex'aeopods are not symmetrical, that on the left side 

 being considerably the larger. In both, the fourth, fifth, and sixth 

 joints are furnished with numerous teeth, the fingers of the left 

 chela being stout, shorter than the palm, while those on the right 

 are subequal to it in length. The small but sturdy fifth peraeo- 

 pods have the sixth joint fringed with close-set spines, the short 

 finger closing tightly on the truncate or slightly concave apex. 



The first pleopods of the male are set rather near together, mem- 

 branaceous, fringed with setae, in shape like a flat spoon, the handle 

 curved, of uniform width, the bowl pointed. The second pair wide 

 apart, with stiff peduncle, the single ramus ending in a membrana- 

 ceous trowel- shaped expansion. The three remaining pairs all mem- 

 branaceous, each with a long and a short ramus. Peduncle of 

 the uropods with a small tooth at each apex, both rami fringed 



