24.6 Annals of the South African Museum. 
Fifth peraeopod, 2nd joint not so broad as in 8rd and 4th peraeopods, 
upper posterior angle quadrate. 
Third uropod, inner ramus ¢ 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 Ist and 2nd uropods. 
Length: 6 3mm.; 2 35 mm. 
Colour : Yellowish straw colour, 5th peraeon and Ist 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 ¢, 
1 ovigerous 9. (S8.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 would have been 
bound almost to make a new species of these specimens in spite of 
their likeness in some characters to Walker’s lonyimanus. 
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 9 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 feature 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 approxi- 
mating to that of the 9. Walker’s specimens show the defining 
tooth shifting back, 7.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 5rd 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, 
