REPORT ON THE BRACHYURA. 
25 
long as broad and reaches the front, and has a small tooth at its antero-internal angle • 
the base only of the flagellum is covered by the rostral spines. 
The merns of the outer maxillipedes is produced and rounded at its antero-external 
angle and slightly notched at the antero-internal angle, where it is articulated with the 
next joint. Chelipedes (in the male) of moderate size ; palm somewhat turgid, smooth ; 
fingers distally acute and having between them, when closed, an interspace at the base. 
Ambulatory legs of moderate length, unarmed. 
The single species is restricted in its range to the southern and eastern coasts of 
Australia. 
Gonatovhynchus tumidus, Haswell. 
Gonatorhynchus tumidus , Haswell, Proc. Linn. Soc. N.S.W., vol. iv. p. 437, pi. xxv. fig. 4, 
1880 ; Cat. Australian Crust., p. 10, 1882. 
An adult male, collected on the southern Australian coast in 2 to 10 fathoms, April 
1874, is referred, but somewhat doubtfully, to this species. 
In this example, the close curled pubescence of the carapace is so dense that the 
tubercles cannot be seen ; the chelipedes (imperfect) are more slender than in Haswell’s 
description and figure, the palms of the chelipedes somewhat more slender and more 
elongated, and the fingers less strongly dentated on their inner margins. 
This species is, I think, better referred to the subfamily Inachinse than to the 
Acanthonychidse. 
The Challenger specimen has the following dimensions : — 
Adult Lines. Millims. 
Length of carapace and rostrum, about . . . . 10|~ 22 '5 
Breadth of carapace, . . . . . . . 9J 16 
Anamathia, S. I. Smith. 
Anamatliia , S. I. Smith, Proc. IT.S. Nat. Mus., vol. vii. p. 493, 1884. 
Amathia, Roux, Crust, de la Mediterranee, pi. iii., 1828, with accompanying desorption. 
„ Milne Edwards, Hist. Nat. Crust., vol. i. p. 285, 1834; name previously used. 
Carapace subtriangulate, rounded behind and armed with long spines on the dorsal 
surface ; a prseocular spine present or absent ; postocular spine distinct ; spines of the 
rostrum well developed, slender and divergent. Post-abdomen in the male (in the 
species I have examined) distinctly seven-jointed. Eyes small. The basal antennal 
joint is slender and usually armed with a tooth at its antero-external angle (which is 
absent in the typical species, Anamathia rissoana). The merus of the outer maxillipedes 
is truncated distally and is slightly produced at the antero-external angle ; the next 
(ZOOL. CHALL. EXP. — PART XLIX. — 1886.) Ccc 4 
