AUSTEALIAN MALACOSTEACA. 83 



This species is allied to O. Itevis, A. Milne-Edwards, but differs 

 from it in having only four teeth on each lateral border ; from 

 C. rotundifrons, of the same author, it differs in having the front 

 dentate, and from G. polita, Heller, in not having a ridge on the 

 gastric region, besides other points. 



G-enus Lissocaecintjs, "White. 

 Carapace sub- orbicular, smooth, sub-porcellanous. Front pro- 

 duced. Basal joint of the antennae short, the following joint 

 scarcely remote from the orbit. Legs naked ; the anterior pair 

 short, the arm scarcely reaching beyond the carapace ; hand very 

 short. 



142. Lissocarcinus polybioides. A.M. 

 Lissocareinus polybioldes, Adams & White, Voy. of H.M.S. 



" Samarang," Crust., p. 46, pi. xi., fig. 5. 



Carapace five-sided, produced in front, narrowed behind, very 

 smooth on the upper surface ; a strong line extending from the 

 antero-lateral angle across the carapace towards the middle line. 

 Front lamellar, produced, obscurely emarginate, its sides straight. 

 Antero-lateral margins with four well-marked teeth behind the 

 external orbital angle. Anterior legs with the hand bicarinate 

 above, the outer carina ending in a tooth. 



Port Jackson. 



Grenus Amphitbite, De Haan. 

 Carapace rather narrow, the frontal and antero-lateral margins 

 meeting at an angle which is usually spinif orm, the antero-lateral 

 rarely shorter than the postero-lateral. Flagellum of antennae 

 not exclnded from the orbit ; basal joint thick, scarcely narrower 

 than the orbital hiatus. 



143. Amphitrite tenuipes. A.M. 

 AmpMtrite tenuipes, De Haan, Faun. Jap., Crust., p. 39, pi. i., 



fig. 4. 



Front with five teeth, the central one scarcely smaller than 

 the rest. Teeth of the sides short. Posterior spine recurved. 

 Arm with the internal carina 3-dentate ; carpus uni-dentate on 

 each side and at the apex ; hand trigonal, bicostate externally. 



Port Denison ; Darnley Island. 



