ATJSTEALIAN MALACOSTBACA. 9 



Carapace stnootli ; 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 proteus, De Haan, Faun. Japon., Crust., p. 95, pi. xxiii., 



figs. 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. 



G-enus Mekzethus, Milne- Edwards. 

 Carapace subtriangular. Rostrum slender, acute. Prse-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., Encycl., t x., p. 139. 



Mencsthius sub-serratus, Adams and White, Voy of H.M.S. 

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



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

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

 in Wien, 1861, p. 4; A. Milne-Edwards, ' Nouv. Arch, du Mus. 

 t. vii., p. 252. 



