a LF ts 
CRUSTACEA OF THE MERGUI ARCHIPELAGO. 2 
being suleated (as in A. hirsutissima and A. areolata), and by many 
other details in the structure of the legs. 
Actea rufopunctata has been recorded from Mauritius, Ceylon, 
Cocos Island, the Fiji and Samoa Islands, the Red Sea, the 
African coast of the Mediterranean, and even from the Canary 
Islands. Mr. Miers records its probable occurrence at Madeira 
and in the South Atlantic. 
16. Acrma ParvuLA, de Haan. 
Menippe parvulus, de Haan, Faun. Japon., Crustacea, p. 21. 
Menippe parvulus, Krauss, Die siidafrikanischen Crustaceen, 1843, 
p. 34, tab. ii fig. 2. 
Three fine specimens of this apparently very rare species are 
in the Collection. They were all obtained at Owen Island. 
Their measurements are as follows :— 
1. 2. 3. 
millim. millim. millim. 
Length of the cephalothorax.. 16 13 14 
Breadth of the cephalothorax . 223 18 20 
They completely agree with the description and with the 
accurate figure published by Krauss, whose specimens were col- 
lected on the coast of Natal, and determined by M. de Haan 
himself. This species, which belongs to the genus Acteéa, as 
characterized by M. Alph. Milne-Edwards, was not taken up by 
this eminent carcinologist in his Monograph of these Crabs. 
Actea parvula, de Haan, is evidently closely allied to Actea 
setigera, M.-Edw., from the West Indies, and seems to represent 
that form in the Indian Ocean. This species may, however, be 
easily distinguished by a somewhat less enlarged carapace, by the 
nearly straight postero-lateral margins, and also by some other 
characters. 
As regards the proportion of the length and the breadth of the 
cephalothorax, this may be expressed by the numbers 47 and 64. 
The anterior half of the upper surface of the carapace is very 
convex longitudinally, but the posterior half appears much de- 
pressed and flattened, as well longitudinally as transversely. The 
regions are only distinctly indicated on the two anterior thirds 
of the upper surface and separated from one another by rather 
deep interregional grooves, but behind a transverse imaginary 
line bordering the urogastric lobe the surface appears every- 
where depressed, undivided by grooves, and uniformly covered 
