296 
THE VOYAGE OF H.M.S. CHALLENGER. 
The purple spots which cover the legs are fewer and larger than the spots on the 
carapace, and the penultimate joints and dactyli of the first, third, and fourth ambulatory 
legs are marked with a large purple blotch in the two males, but not in the female. 
The striations of the dactylus of the mobile finger of the chelipedes are nearly 
obsolete. 
Adult $ . Lines. Millims. 
Length and breadth of carapace, . . . . . 12-J- 26 - 5 
Matuta Isevidactyla , Miers. 
Matuta lunciris, Miers, torn, cit., p. 247, pi. xl. figs. 10, 11, 1877 ; nec Cancel' lunaris, Herbst. 
„ Isevidactyla, Miers, Ann. and Mag. Nat. Hist., ser. 5, vol. v. p. 316, 1880. 
Port Jackson, 3 fathoms (a small male). 
Its dimensions are as follows : — 
Lines. Millims. 
Length of carapace, ..... 
7 
15 
Breadth of carapace, nearly .... 
7 
14-5 
Length of a chelipede, ..... 
6 
12-5 
In this specimen the striated ridge of the outer surface of the dactyl of the chelipede 
is obsolete, and this joint is externally smooth. The series of tubercles on the outer 
margin of the palm is parallel (nearly) with the lower margin. The front is distinctly 
notched, and (the specimen being of small size) all the tubercles of the dorsal surface of 
the carapace are distinct. 
Matuta inermis, Miers. 
Matuta inermis, Miers, Crust, in Rep. Zool. Coll. H.M.S. “Alert,” p. 256, pi. xxvi. fig. C, 1882. 
Torres Strait, 6 fathoms, in lat. 10° 36' 0" S., long. 141° 55' 0" E. (Station 187). 
An adult female and three smaller males are in the collection. 
The female is of much larger size than the type of the species described in the above 
report, having the following dimensions : — 
Adult $ . 
Lines. 
Millims. 
Length of carapace, nearly . . . . 
16 
33-5 
Breadth of carapace, nearly .... 
15 
31-5 
Length of a chelipede, nearly 
14 
29-5 
Length of second ambulatory leg, 
22 
46 '5 
The colour (in spirit) is yellowish-brown, purple on the anterior part of the carapace, 
sides of the branchial regions, and the dactyli of the fifth ambulatory legs. 
