AUSTEALASIAN SPECIES. 181 



is that to the naked eye the ventral surface appears quite pale 

 with coloured papillae projecting from it. The predominant 

 pigment of the ventral surface is the blue^ but orange is 

 present. The hind end of the ventral surface in the region of 

 the last three legs is darker than elsewhere, in consequence of 

 the great number of the pigmented papillae. 



In addition to the above characters, it may be mentioned 

 that the genital papilla of the female is remarkably prominent, 

 and bears at its free end a longitudinally disposed slit. In the 

 male the genital papilla is fairly prominent, but its aperture is 

 wider and more rounded, resembling the same structure in 

 both sexes of the New Zealand species. I append a short 

 general description of the two specimens. 



There are fifteen pairs of legs. The ventral surface is pale, 

 dotted uniformly with pigmented papillae, which are more 

 numerous behind. The dorsal surface is dark, and has a 

 median white line. The pigment is of the two colours found in 

 the New Zealand species, viz. bluish to green, and orange to 

 brown. The blue pigment is much the most conspicuous on 

 the dorsal surface. The antennae are blue mainly, but possess 

 some orange pigment arranged in rings round their basal 

 halves. 



The genital papilla, which is remarkably prominent in the 

 female, is between the legs of the fifteenth pair. The feet 

 and legs resemble exactly, so far as could be made out, those of 

 the New Zealand species. The feet have the median dorsal 

 papilla so characteristic of that species ; there are three pads 

 on the legs, and a patch of blue pigment round the opening of 

 the nephridia. 



If there is any difference, it relates to a faint double row of 

 somewhat turgid papillae proceeding outwards from the open- 

 ing of the nephridium along the ventral surface of the leg. 

 The same feature is present in a much more marked form in 

 P. capensis. The opening of the nephridium is perhaps 

 slightly more conspicuous than in the New Zealand species. 

 The last leg of the male presents a white papilla on its ventral 

 surface. The outer blade of the jaw has an accessory tooth, 



