272 The Malacostraca of Durban Bay 
dithcult to determine any effective lines of division between the last 
five segments of the pleon. In the male, however, the sides of the 
sixth segment begin hy diverging and end by converging, with tuber- 
culiform elevations in between. Centrally to the rear it carries a 
pointed upraised process. The seventh segment is triangular, with 
blunt apex. The pleon of the female is remarkably broad. 
The mandible has a very broad, angled but not denticulate cutting 
edge, against which lies the palp with setose terminal joint. The 
maxille I could not satisfactorily determine. The very delicate first 
and second maxillipeds are figured, I think, for the first time for this 
genus. In the second it will be noticed that the penultimate joint of 
the endopod is broader than either the fifth or seventh. For the 
third maxillipeds neither as to Lewcisca nor Carcinaspis do the authors 
make any mention of the three terminal joints. These are, I believe, 
rudimentary, affixed low down on the inner margin of the sharply- 
pointed fourth joint. 
The chelipeds are nearly alike, that of the male on the right rather 
the larger. In the female they are similar to those of the male, but 
not quite so large. The under surfaces are white and smooth, while 
the upper are ridged and have colour markings on various parts. The 
movable finger is curved, with inner margin minutely denticulate. 
The ambulatory limbs are much smaller than the chelipeds, and the 
last pair are the shortest. The narrow, nearly straight, fingers have 
dark curved tips. 
Genus ACT AXOMORPHA, Miers. 
1877. <Actwomorpha, Miers, J. Linn. Soc. London, Zvol., vol. xiii, 
no. 67, p. 184. 
1896. A., Alcock, J. Asiat. Soc. Bengal, vol. Ixv, pt. 2, pp. 166, 
DEO Ma iia 
This genus is near to Oreophorus, Riippell, but the carapace, though 
granular and pitted, is not honeycomb and only partially covers the 
ambulatory limbs in flexion. The front is broad, the buccal cavity 
arched, the pleon narrowly oval and seven-segmented in both sexes. 
The eyes are small, the first antenne obliquely folded, the second 
almost obsolete. Mandibles normal. First maxilla with inner plate 
narrow, outer distally broad, palp two-jointed. Second maxille with 
lower lamina almost linear, upper very unequally bilobed, apical part 
of endopod narrowly produced from a wide base. First maxilliped 
