REPORT ON THE BRACHYURA. 
119 
sutures very distinct. The front is bilobate or indistinctly quadrilobate, the antero- 
lateral margins are regularly arcuated and divided into lobes which are rounded and 
often obscurely defined. The orbits are small and are usually marked with two or three 
closed fissures. The post-abdomen in the male is five- to seven -jointed. The eyes are 
set on short thick pedicels. The basal antennal joint is short and reaches the infero- 
lateral process of the front, but not the extremity of the interior subocular lobe of the 
orbit ( Psaumis , Kossmann), or more generally, enters slightly within the interior hiatus 
of the orbit, and then may reach the extremity of the subocular orbital lobe ; the 
flagellum lies within the interior orbital hiatus. The exterior maxillipedes present 
nothing remarkable, having the merus-joint quadrate, distally truncated, and slightly 
emarginate at the antero-internal angle. The chelipedes are subequal and moderately 
developed, with the wrist and palm usually granulated and the fingers distally acute or 
subacute, not excavated ; the ambulatory legs are of moderate length and are usually 
compressed, not distinctly carinated, but the superior margins of the merus-joints are 
sometimes acute. 
The species of this genus (even if Actseodes be excluded) are numerous and of small 
size, and are widely distributed both in the Atlantic and Oriental or Indo-Pacific 
regions. 
The nearest ally to Actsea is undoubtedly Actseodes , Dana, which is distinguishable 
merely by the excavated fingers of the chelipedes, and which is united with Actsea by 
Milne Edwards and Kossmann, but in the absence of any complete revision of the 
numerous genera of the Cyclometopa or Cancroidea since that given by Dana, I have 
followed his classification, in which they are referred to distinct subfamilies . 1 
The following are species which are referable to this genus, and are either not 
included in Milne Edwards’ monograph of the genus {tom. cit.), or have been described 
since its publication : — 
Actsea peronii (Milne Edwards )= Xantho spinosus, Hess. Australia. 
Actsea parvula (de Haan). Cape of Good Hope ; Natal. This may be a species 
of Actumnus. 
Actsea consobrina, A. Milne Edwards. Upolu, Samoan Islands. 
Actsea margaritaria, A. Milne Edwards. Cape St. Vincent. 
Actsea dovii, Stimpson. San Salvador, Panama. 
Actsea hystrix, n. sp. Off Cape York. 
Actsea spinifera, Kingsley. Plantation Key. 
Actsea glabra (Kossmann). Red Sea . 2 
1 If (as would probably be done in a more natural system), Actseodes be united with Actsea, then it will probably 
be necessary to unite also Garpilodes with Liomera, Leptodius with Xantho, Lophozozymus with Zozymus, &c. 
2 Actseodes xantho, Lockington, according to a MS. note in the author’s copy of his paper, is synonymous with 
Actsea sulcata, Stimpson. 
