's RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 225 
than in the other species, its length slightly exceeding the breadth at 
the base and the length of the preceding segment, whereas 
both in Cl. balansae and Cl. merÿuiense the length of the last segment 
distinctly exceeds its breadth at the base and is twice as long as the 
preceding segment (de Man 1896). | 
All the minute characters of the chelipeds are, dike those of the 
walking legs, concealed beneath the same continuous fur, that clothes the 
upper surface of the carapace, and among this fur numerous small tufts 
of somewhat longer hairs are freely scattered. Only the fingers of the 
chelae and the tip of the dactyli are free from hairs, the former are of 
an ivory colour, very conspicuous against the general dark hue of the 
palm. If the upper border of the arm of the cheliped be denuded, a 
minute, rectangular subdistal tooth proves to be present, as has been 
observed by Miss Rathbun, but it is wanting in the other species (de 
Man 1896); the anterior and posterior border are smooth, not at all 
toothed, the former scarcely expanded near its distal end. The carpopo- 
dite (wrist) is rugose; the upper surface bears some large tubercles, each 
of which is covered by a tuft of hairs; the inner angle is some- 
what produced in my specimens, though it is described as being 
blunt by Miss Rathbun, as in the other species of this genus. The palm 
(Fig. 3a) is somewhat longer than the fingers, about as long as high, smooth 
and shining, continuously covered at the outer surface with hairs, but 
with denuded patches at the inner face, and with isolated tufts of hairs 
outside the upper border; the latter is somewhat better marked in the 
© than in the © and very finely punctate, but in the latter sex a dis- 
tinct pectinated crest, consisting of more than 30 horny- 
coloured, pointed and erect teeth, is observed, the height of 
which teeth is largest in the middle of the longitudinal crest and de- 
creases towards both ends. A similar crest occurs in the © of the other 
species (de Man 1896). : 
The fingers, as has been said, are naked, with only some patches of 
hairs near the base; they are shorter than the palm, not gaping, straight, 
with smaller and larger pits at both inner and outer surface, arranged 
in indistinct longitudinal rows, but elsewhere smooth and shining; the 
tips are provided with horny margins, and the crenulation of the cutting 
margins is not very prominent; the under margin of the immobile finger 
is in a straight line with that of the palm. The upper border of 
the movable finger of the { presents a longitudinal row 
of 14—15 transverse tubercles, extending to near the tip; the 
proximal tubercle, near the base, is rounded off, but the following are 
oval, their longer axis being not exactly perpendicular to the long axis 
