188 AUSTHALIAN HALACOSTRACA. 



a deep longitudinal groove in the anterior half of the external 

 surface, and terminated by an obtuse and very short immobile 

 finger ; the mobile finger equally obtuse and strongly curved. 



[M.-E.] 



Australia (Mus. Paris). 



350. Alpheus frontalis. 



Alpheus frontalis, Milne-Edwards, Hist. Nat. Crust., t. ii., 

 p. 356. 



Carapace slightly carinated in its anterior portion ; front very 

 prominent, nearly triangular, not spiniform. Orbital vaults very 

 prominent. Second joint of the internal antenna? slender and 

 elongated. Lamellar appendages of the external antennae shorter 

 than the peduncle ; no lateral spine at the base. Anterior legs 

 smooth and very unequal ; the large hand swollen, the smaller 

 more or less compressed. \M.-J3.'] 



Australia (Mus. Paris). 



351. Alpheus Edwardsii. 



Alpheus Neptunus, "White, List Crust. Brit. Mus., p. 74, (1847). 

 Zoology Erebus and Terror, tab. 4, f. 3, (1874). 



Athanasus Edwardsii, Audouiu, Savigny's Descr. de l'Egypte, 

 pi. 10, fig. 1 ; not Alpheus Edwardsii, Milne-Edwards, Hist. Nat. 

 des Crust., t. ii., p. 352 : Dana, U. S. Explor. Exped., Crust,, i., 

 p. 512, pi. xxxiv., fig. 2. 



Alpheus Edwardsii, Miers, Zool. Erebus and Terror, Crust., p. 1. 



B,ostrum linear, arising from the front margin of the carapace. 

 Carapace more inflated than in Alpheus strenuus. Hand larger, 

 similar to that of A. strenuus, but the fingers narrower compared 

 with the palm. Eirst joint of the carpus of the second pair of 

 legs longer than the second, the second joint longer than either 

 the third or fourth, and about as long as the fifth joint. 



Port Essington (Brit. Mus.) 



352. Alpheus strenuus. 



Alpheus Boris, "White, List Crust. Brit. Mus., p. 75, (1847) ; 

 Zool. Erebus and Terror, tab. 4, fig. 2 (1874). 



Alpheus Rhode, "White, List Crust. Brit. Mus., p. 75 (1874). 

 Alpheus a carus, (Fabr.) Heller, Beise der Novara, Crust, p. 1U8. 



