660 MISS M. J. RATHBUN ON CRUSTACEA 
PILUMNUS VESPERTILIO (Fabricius). 
Pilumnus vespertilio Alcock, Jour. Asiat. Soc. Bengal, vol. Ixvii. 
1898, p. 192, and synonymy. 
Under stones, Home Lagoon, Hermite; July 1912; No. 106: 
EONS 
PILUMNUS CHRULESCENS A. Milne-Edwards, var. 
? Pilumnus cerulescens Aleock, Jour. Asiat. Soc. Bengal, vol. 
Ixvii. 1898, p. 196; Rathbun, Kgl. Danske Vidensk. Selsk. 
Skrifter, 7 Rekke, naturv. og mathem., vol. v. p. 355, pl. 1. 
fig. 15. 
Under stones, Home Lagoon, Hermite; July 1912; No, 106: 
orc 
Dimensions. Length of carapace 12:6 mm., width 16°8 mm. 
This is the same form as that which I recorded from the Gulf 
of Siam (doc. cit.). The specimen is considerably larger than any 
examined at that time, and some of the features are more sharply 
marked. Although all of the regions are ornamented with 
granules, they are not closely placed. The outer dentiform lobe 
of the front is separated from the rest of the front by a U-shaped 
gap. The two emarginations in the upper border of the orbit 
are well marked. The antero-lateral projections and also the 
subhepatic one are well developed spines; the orbital and sub- 
hepatic spines are shorter than the other three; these last have 
a stout base and form at the middle a shoulder from which a 
cluster of hairs proceeds. A striking feature of the cheliped is 
the presence on the upper margin of the merus of two strong 
white spines, one terminal, the other subterminal and larger. 
The carpus is armed with short, stout spines, the manus with 
granules; neither spines nor granules are closely placed, and the 
granules are absent from the lower distal corner of the larger 
palm. The ornamentation of the whole upper surface is obscured 
by the coarse hairs of uneven length. 
The colour in formalin and glycerine is brownish; the carapace 
has a ground of yellowish-brown, overlaid with patches of reddish- 
brown ; upper surface of legs with two patches of brownish-red 
on the merus, the carpus, and the propodus. 
ACTUMNUS SETIFER (de Haan). 
Actumnus setifer Alcock, Jour, Asiat. Soc. Bengal, vol. Ixvii. 
1898, p. 202. 
Monte Bello Islands: 1 ¢@. 
The areole of the undenuded carapace are high and very deeply 
separated and the lateral teeth very prominent; otherwise this 
individual does not differ from typical specimens from Japan. 
