AUSTEALIAN MALACOSTEACA. 133 



Carapace quadrate, dilated, ornamented with compressed 

 granules which are larger towards the margin ; gastric region 

 with three tubercles ; cardiac region with a large tubercle cir- 

 cumscribed by a very narrow fissure ; posterior margin with two 

 tubercles ; anterior legs long, granulated. 



Bass' Straits (Grodeffroy Museum). 



G-enus Act^omoepha, Miers. 



Carapace convex, with the antero-lateral margins arcuate as 

 in the Cancroidea. Buccal cavity broader and less decidedly 

 triangulate than is usual in the Oxystomata. Abdomen of the 

 male seven- jointed. 



255. Actseomorpha erosa. 



Actceomorpha erosa, Miers, Journ. Linn. Soc, Zool., Vol xiii., 

 p. 1, pi. xiv. 



Carapace everywhere granulated, the granules interspersed 

 with small deep pits. A large rounded elevation behind each 

 orbit, one on the cardiac region, aud one on each branchial region 

 near the lateral margin. Anterior legs obscurely granulated, 

 robust ; arm very short, hand but little longer than the wrist ; 

 fingers straight, acute. Ambulatory legs short, nearly smooth, 

 laterally compressed. Tarsi very small, slender and acute. \_M.~\ 



Port Curtis (Brit. Museum). 



Family II. MATVTIBM. 



Afferent canal to the branchiae entering at the side of the 

 pterygostomian region. Terminal joints of the external maxilli- 

 pedes concealed, third joint triangular, palp scarcely longer than 

 the second joint. Male genital appendices arising from the base 

 of the fifth pair of legs. Legs usually natatorial. 



Genus Matuta, Fabr. 



Carapace sub- orbicular, with a strong spine at the junction of 

 the antero-lateral and postero-lateral margins. Four posterior 

 pairs of legs with the last and penultimate joints expanded. 



256. Matuta victrix. A.M. 

 Cancer victor, Pabr., Spec. Ins., ii., Append., p. 502 (1781) ; 



Ent. Syst., ii., p. 419 (1798). 



