AUSTRALIAN MALACOSTKACA. 9 



Carapace smooth ; antero-lateral margins acute ; gastric region 

 with three low tubercles arranged in a triangle with the base 

 forwards ; cardiac region with a low tubercle. Antero-lateral 

 borders with a sharp process on either side of the base of the 

 rostrum, and in the female two broad processes behind, the 

 anterior bilobed at the extremity, the posterior and larger trilobed ; 

 in the male one bilobed lateral process at the postero-lateral 

 angle. Rostrum obliquely deflexed, bifurcate at the tip. 

 Anterior limbs with a small tooth at the distal extremity of the 

 third joint. Three posterior pairs of limbs, each with a small 

 spine in the middle of the under surface of the fifth joint. 



Port Jackson ; Port Stephens ; Port Philip. Also occurs in 

 New Zealand. 



15. Huenia proteus. A.M. 

 Huenia protens, De Haan, Faun. Japou., Crust., p. 95, pi. xxiii., 



tigs. 4-6 ; Adams and White, Zoology of the "Samarang," Crust., 

 p. 31, pi. iv., figs. 4-7 ; Haswell, 1. c, p. 437. 



Lower border of the front acute. Carapace in the male 

 elongate, with one or two lamellar lobes ; front much produced, 

 longer than the carapace. Carapace in the female expanded; 

 sides with two lamellar projections ; front scarcely exceeding in 

 length half the rest of the carapace. Ambulatory legs with the 

 anterior margin strongly carinate. 



Torres Straits. Occurs also on the coasts of Japan and China. 



Genus Mex/etiius, Milne-Edwards. 



Carapace subtriangular. Rostrum slender, acute. Pra>ocular 

 spine well developed. Anterior legs with the palm slightly 

 compressed, fingers arcuate. Ambulatory legs not compressed. 



16. Mensethius monoceros. A.M. 

 Pisa monoceros, Latr., Eneycl., t x., p. 139. 



JMencetltius snb-serratns, Adams and White, Yoy of H.M.S. 

 " Samarang," Crust., p. 18, pi. iv., figs. 1 and 2. 



Mencethius monoceros, Milne- Edw., Hist. Nat. Crust., t. i., 

 p. 339 ; Heller, Verhandl. der K. K. Zoologish-botan. Gresellsch. 

 in Wien, 1801, p. 4 ; A. Milne-Edwards, Nouv. Arch, du Mus. 

 t. vii., p. 252. 



