RATHBUN: CRABS FROM THE MALDIVE ISLANDS. 133 
is spinulous, the last three joints of the legs are provided with denticulations. 
According to Alcock, who may have had small specimens, the chelipeds are 
quite smooth except for a few granules at the inner angle of the wrist, and the 
last three joints of the legs are without any denticulations or have only a trace 
of them on the propodite. 
In the Maldive examples of K. nitida Stimpson, the surface of the chelipeds 
and legs is similar to that of K. hendersoni, the rugee of the palm being a little 
more distinct. The dactyli of the legs are considerably longer and slenderer ; 
in the second pair they are 4 times, in K. hendersoni 3 times, as long as wide. 
Furthermore, in K. niteda, the notch below the outer angle of the orbit is more 
pronounced, the basal antennal joint is narrower, the color of the thumb does 
not run back on the palm as in K. hendersont. 
Dimensions. — Male from Nallandu : Length, 7.7 mm.; width, 8.4 mm. fronto- 
orbital width, 5.4 mm. 
MAIIDZ:. 
Oncinopus aranea pe Haay, 
Oncinopus aranea AxLcock, Journ. Asiatic Soc. Bengal, LXIV. 183, 1895, and 
synonymy. 
Nallandu, 24 fathoms, at anchorage, January 18; one young male. 
Halimus tenuicornis (Pocock), 
Hyastenus tenuicornis ALcock, Journ. Asiatic Soc. Bengal, LXIV. 215, 1895, and 
| synonymy. Illus. Zool. Investigator, part VI. pl. XX XIII. fig. 4, 1898. 
Nallandu, 24 fathoms, at anchorage, January 18; 2 females (one with eggs). 
Halimus agassizil, sp. nov. 
Fig. 6. 
Carapace oblong-triangular, slightly pointed behind, the regions well-defined, 
sparsely setose, tuberculated, or spinulous, as follows: —7 sharp tubercles or 
spinules disposed in a cross on the gastric region, 3 on the median line, 4 form- 
ing a Y on the cardiac region, one near the lateral boundary of that region, one 
on the intestinal region, 3 spines near the outer margin of the branchial region, 
2 smaller spines further in, one marginal hepatic spine. Posterior margin 
granulate; parallel to it another row of granules. 
The rostrum consists of 2 slender slightly divergent spines, which in the male 
are one-half as long as the carapace proper; margins rough with fine spinules 
and fringed with sete. 
The angles of the supra-ocular eave are produced, the anterior is acuminate, 
