J4(! Ann-ah of tin 3 South African Museum. 



Fifth peraeopod, 2nd joint not so broad as in 3rd and 4th peraeopods, 

 upper posterior angle quadrate. 



Third uropod, inner ramus i length of outer, 2nd joint of outer 

 smaller than inner ramus, with 2 apical setae. All the uropods 

 without lateral spines or setae, except for one spinule on each peduncle 

 and ramus in 1st and 2nd uropods. 



Length : 3 mm. ; ? 3 - 5 mm. 



Colour : Yellowish straw colour, 5th peraeou and 1st pleon segments 

 with a transverse band of brown speckling, side-plates and pleura also 

 speckled with brown, eyes black. 



Locality : Durban Bay. July, 1915. (H. W. Bell-Marley.) 1 J . 

 1 ovigerous ? . (S.A.M. No. A3869.) 



A second and, in my opinion, not quite mature male from the same 

 locality (S.A.M. No. A3840) is the connecting link between the above 

 described specimens and Walker's. Without it one Avould have been 

 bound almost to make a new species of these specimens in spite of 

 their likeness in some characters to Walker's lonyimauus. 



This second male agrees with Walker's description and figures 

 except that the lobe of the 5th joint of the 2nd gnathopod is not so 

 prominent and the hind margin is longer proportionately to the palm 

 (approaching thus the form of the ? described above), and the first 

 of the two palmar teeth is short, blunt and knob-like. The 2nd joint 

 has the ear-like lobe as described above, but of which Walker makes 

 no mention. 



Another featui-e is the telson, which agrees with that described 

 above ; Walker says of his specimens " telson ... of the usual 

 form." In the absence of a more definite description, I think this 

 point need not form a stumbling block, especially as the gnathopods 

 correspond very closely. When more specimens come to light from 

 both localities I think that any doubts there may be as to the specific 

 distinctness of these two forms will vanish. 



This male measures 2'75 mm. and possesses a 2nd gnathopod appi-oxi- 

 matiug to that of the ? . Walker's specimens show the defining 

 tooth shifting back, i.e., the reduction of the hind margin at the 

 expense of the palm, until it is right at the base of the joint, when it 

 is bent inwards at a right angle to the hand, as in the first ^ described 

 above. It is legitimate to suppose that this last infolding of the tooth 

 and the development of the incurved lobe on 3rd joint occur only at 

 the last moult and are signs of sexual maturity ; they would certainly 

 form most efficient " claws " for holding the female. 



The markings of this second male are a little different from that 

 given above : ground colour as before yellowish, head a little deeper, 



