312 PROCEEDINGS OF THE NATIONAL MUSEUM. voL.xxn. 



Family ALPHEID^. 



Genus ALPHEUS Fabricius. 



KEY TO THK WEST AFRICAN SPECIES OF THE GENUS ALPHEUS. 



A. A deep fissure the length of the orbital lobes separating them from the 



rostrum intrinsecus. 



A'. No deep fissure between rostrum and orbital lobes. 

 B. Orbitnl arches armed with a spine. 



C. Hands tuberculate on inner face tuierczilosus. 



C. Hands not tuberculate on inner face macrocheles. 



B'. Orbital arches entire. 



C. Rostrum carinated. Merus of large claw without a spine houvieri. 



C. Rostrum not carinated. Merus of large claw with a spine at distal end of 

 lower margin paracrinitus. 



ALPHEUS BOUVIERI A. Milne-Edwards. 



Alpheus edivardsii Dana, Crust. U. S. Expl. Exped., 1, 1852, p. 542; 1855, pi. xxxiv, 



fig. 2. Not A. edwardsii Audouin. 

 Alpheus houvieri A. Milne-Edwards, Bull. Soc. Philom. Paris (7), II, 1878, 



p. 231. 



West African localities. St. Jago, Cape Yercle Islands (Dana); off 

 St. Vincent, Cape Verde Islands (Bate, as echcardsii); Cape Verde 

 Islands (A. Milne-Edwards); Bibundi, Kamerun (Aurivillius, as 

 edwardsi). 



ALPHEUS MACROCHELES (Hailstone). 



Hippolyte macrocheles Hailstone, Mag. Nat. Hist., VIII, 1835, pp. 395, 549, 



552,553. 

 Alpheus megacheles Norman, Ann. Mag. Nat. Hist. (4), II, 1868, p. 175. 

 Alpheus 2}ontedcriw Rocn^SRVi^E, Bull. Soc. Philom. Paris (7), VII, No. 4, 1883, 



p. 174. 



Range. — Euroi)e; West Africa. 



West African locality. — Senegambia (Eochebrnne), in Poniederia 

 natans, rivers of Leybar, Thiank, and Dakar-Bango, where they empty 

 into the sea. 



Contiere^ says that Hailstone uses the specific Jia,me ^' megacheles^^ 

 on the figure, ^^ macrocheles^^ in the text.^ Norman also ^ refers to 

 '■''Hippolyte megacheles Hailstone."* In the copies of the eighth volume 

 of the Magazine of Natural History, to which I have access, the name 

 '''■ megacheles'^'' is not given. On page 395 the name '■hnacrocheles'''' is 

 used, and there is no figure on that page. ''^Macrocheles'''' is used 

 again on pages 549, 552, and 553. Figure 49, on page 553, has no name 

 beneath it, but in the list of engravings on page vii is given as 

 " macrocheles.^^ 



'Ann. Sci. Nat. (8), IX, 1899, p. 10. ^ Ann. Mag. Nat. Hist. (4), II, 1868, p. 175. 



2 Mag. Nat. Hist., VIII, 1835, p. 395. ^ Mag. Nat. Hist., VIII, p. 395. 



