122 
THE VOYAGE OF H.M.S. CHALLENGER. 
From the Australian form, designated by White Actsea carcharias, 1 which is probably 
to be regarded merely as a marked variety of Actsea granulata (Audouin), it is at once 
distinguished by the non-punctulated carapace, the punctulated post-abdomen, which 
is smooth in the middle line, and the much longer spinules of the ambulatory legs ; the 
latter character also distinguishes it from the Australian Actsea calculosa, Milne Edwards. 
Actsea peronii (Milne Edwards). 
Xantlio peronii, Milne Edwards, Hist. Nat. Crust., vol. i. p. 392, 1834. 
„ spinosus, Hess, Arcliiv f. Naturgesch., vol. xxxi, p. 132, pi. vi. fig. 3, 1865. 
Actsea peronii, Haswell, Cat. Australian Stalk and Sessile-Eyed Crust., p. 46, 1882. 
Off East Moncoeur Island, Bass Strait, in 38 to 40 fathoms, Station 162 (several 
males and females) ; South Australian coast ? “ 2 to 10 fath., April 1874 ” (a male). 
The colour (in spirit) is pinkish or orange. In the largest examples the tubercles 
of the carapace and spines of the legs are very prominent, and traces of the former are 
discernible even on the posterior and postero-lateral parts of the carapace, which, in the 
smallest examples, is perfectly smooth in its posterior part. 
The largest male measures as follows : — 
Adult £ . 
Lines. 
Millims. 
Length of carapace, .... 
4 
8-5 
Breadth of carapace, .... 
10-5 
Length of a chelipede, 
H 
10-5 
Length of first ambulatory leg, 
H 
10-5 
Actsea rufopunctata (Milne Edwards), var. nodosa. 
Actsea nodosa, Stimpson, Ann. Lyc. Nat. Hist., New York, vol. vii. p. 203, 1862. 
,, „ A. Milne Edwards, Nouv. Archiv. Mus. Hist. Nat., voL i. p. 266, pi. xvii. fig. 6, 
1865; Crust, in Miss. Sci. au. Mexique, pt. 5, p. 245, 1879. 
Bahia, shallow water, September 1873 (an adult female). 
This specimen differs in nothing from Oriental examples of Actsea rufopunctata, 
unless it be in the somewhat more closely and finely granulated prominences of the 
carapace, and I have observed a specimen from the Mauritius, in the collection of the 
British Museum, which resembles it in this respect. The carapace, although faded, yet 
presents distinct traces of the characteristic red colour of Actsea rufopunctata . 2 
Adult $ . Lines. Millims. 
Length of carapace, rather over . . . . . 6 13 
Breadth of carapace, nearly . . . . . 9 18 - 5 
1 Proc. Zool. Soc. Lond., p. 224, 1847. 
2 I have already noted the occurrence of Actxa rufopunctata in the Atlantic Region, Proc. Zool. Soc. Lond., p. 68, 
1881. 
