CRUSTACEA OF THE MERGUI ARCHIPELAGO. A7 
35. ACTUMNUS SETIFER, de Haan. 
Cancer (Pilumnus) setifer, de Haan, Fauna Japonica, Crustacea, p. 50, 
pl. iii. fig. 3. 
Actumnus tomentosus, Dana, l. c. t. 1. p. 243, pl. xiv. fig. 2. 
Actumnus setifer, Alph. Milne-Edwards, Nouv. Arch. du Muséum Hist. 
Nat. t. i. p. 287, pl. xviii. fig. 5. 
Actumnus tomentosus, Alph. Milne-Edwards, 1. c. p. 285, and Nouv. 
Arch. Mus. Hist. Nat. t. ix. p. 194. 
Actumunus setifer, Miers, Report on the Zoological Collections made 
during the Voyage of H.M.S. ‘ Alert,’ Crustacea, pp. 225 & 226. 
A small male specimen, which I refer to this species, was col- 
lected in the Mergui Archipelago. 
The antero-lateral margins are armed with three small spini- 
form teeth behind the scarcely prominent, though acute external 
orbital angle, and some small acute granules occur between 
these spiniform teeth. The lobes of the upper surface of the 
cephalothorax are very distinct and covered with small acute 
_ granules anteriorly and on the antero-lateral regions, those of 
the hepatic region being the largest and most prominent. The 
specimen has lost one chelipede. In the preserved chelipede, the 
outer and upper surface of the hand is covered with many acute 
granules, which even occur at the base of the index; the mobile 
finger is covered with some acute granules at its base. The 
fingers appear to be smooth and their tips are pointed; the 
index is provided with a small tuft of hair on its outer and on its 
inner surfaces, near the dentiferous margin. The outer surface 
of the hand is rather convex, whilst the inner surface is nearly 
plain and almost perfectly smooth, which is also characteristic of 
the inner surface of the fingers. 
Actumnus setifer has been recorded from Japan, Tahiti, and 
New Caledonia. 
36. ACTUMNUS ELEGANS, 0. sp. | 
Of this new species, seven specimens (5 d', 2 2 ) were collected 
at Sullivan Island. It is most closely allied to Actumnus obesus, 
Dana, from the Sandwich Islands, which evidently represents this 
form in the Mergui Archipelago. 
It may be distinguished at first sight from A. obesus by the 
antero-lateral margins being armed with six acute spinuliform 
granules, behind the acute granuliform external angle of: the 
orbits, arranged in three groups, two together. 
