8 The Malacostraca of Natal 
pleon, distinctly seven-jointed and rather narrow in the female, the 
limbs and the third maxillipeds, carry on the scheme of coloration by 
numerous spots variously disposed. The fingers of the equal chelipeds 
are very dark with white teeth; those of the walking legs are coated 
above and below with a dark felt which leaves bare a curved unguis ; 
the three preceding joints are smooth, broad, and sharp-edged. 
The three-jointed palp of the mandible by its colour contrasts with 
the whiteness of the trunk. The inner plate of the first maxilla is 
very narrow. The fourth joint of the third maxillipeds is less than 
half the length of the third, but distally sightly broader. 
Carapace 29 mm. broad by 21 mm. long. ° 
Mr. Bell Marley recording this specimen from Isipingo Beach, near 
Durban, notes that it burrows in sand very quickly. 
= 
Genus XANTHO, Leach. 
1814. Xantho, Leach, Edinburgh Encyclopedia, vol. vii, p. 430.. 
XANTHO HYDROPHILUS (Herbst). 
1790. Cancer hydrophilus, Herbst, Krabben und Krebse, vol. i, pt. 
- 8, p. 266, pl. 21, fig. 124. 
I have already discussed the synonymy of this species in the Ann. 
S. Afr. Mus., vol. vi, pt. 1, p. 7, 1908. See‘also vol. vi, pt. 4, p. 297, 
1910. 
Now I have to acknowledge a specimen obtained by Mr. Bell 
Marley, which is nearly of the same size as that figured by Herbst, ~ 
and also exhibits remarkable agreement with it in coloration, having 
a large red blotch on the gastric region, with the rest of the carapace 
uniformly light, described by Mr. Bell Marley as white in the living 
state. The specimen is a male, with the third, fourth and fifth 
segments of the pleon coalesced, but their limits well defined. 
XANTHO QUINQUEDENTATUS, Krauss. 
1843. Xantho d-dentatus, Krauss, Siidafrik, Crust., p. 30, pl. 1, fig. 
3, ac. 
A prettily marked specimen agrees well with the figure and 
description given by Krauss. It is, however, a female laden with eggs 
which, as preserved, are a bright red. The width of the carapace at 
the penultimate tooth is 20 mm., the median length 13 mm. Krauss 
gives, apparently for the male, breadth 7:2 lines, length 5:3 lines. The 
