NO. 1199. CBUSTACEANS OF WEST AIBIGA—BATHBVN. 299 



Genus LEUCOSIA Fabricius. 



LEUCOSIA SPINOSA (Miers). 



Ilia spinosa Miees, Ann. Mag. N. H. (5), VIII, 1881, p. 265, pi. xv, fig. 3. 



West African localities. — Canary Islands; Goree Bay, Senegambia, 

 9 to 15 fathoms (Miers). 



Family DOEIPPID^. 



KEY TO THE WEST AFRICAN GENERA OF THE FAMILY DORIPPIDJi. 



A. The anterior extremity of the buccal cavern passes between the antennules to or 

 even beyond the tip of the front; the afferent branchial apertures are 

 situated in front of the bases of the ohelipeds, a bridge of the carapace 

 intervening Dorippe. 



A'. The anterior extremity of the buccal cavern either stops at, or does not reach as 

 far as the basal joint of the antennules; the afferent branchial openings are 

 situated immediately in front of the bases of the ohelipeds Etliasa. 



Genus DORIPPE Fabricius. 



DORIPPE ARMATA Miers. 



Dorippe armata White, Manuscript, Miers, Ann. Mag. N. H. (5), VIII, 1881, p. 

 269, pi. XV, fig. 4. 



West African localities. — Goree Bay, Senegambia, 9 to 15 fathoms 

 (Miers) ; Island of St. Thomas (Osorio) ; Kongo Expedition (White's 

 type) ; Benguela (Osorio). 



Genus ETHUSA Roux. 



ETHUSA MASCARONE (Herbst). 



Cancer mascarone Herbst, Natur. Krabben u. Kxebse, I, 1785, p. 191, pi. xi, 



fig. 69. 

 Ethiisa mascarone Roux, Crust. Medit., 1828 [p. 83], pi. xviii. 



Range of typical form. — Mediterranean; West Africa. 

 West African localities. — Canary Islands (Miers); Goree Bay, Sene- 

 gambia, 9 to 15 fathoms (Miers). 



Family EANINID^. 



Genus RANINA Lamarck. 

 RANINA RANINA (Linnaeus), 



Cancer raninus LiNNiEUS, Sys. Nat., 10th ed., 1758, p. 625. 

 Banina serrata Lamarck, Desmarest. 

 Banina dentata Latreille, Milne-Edwards. 



Range. — Oriental region; West Africa (Osorio). 

 West African locality. — Island of St. Thomas (Osorio, 1887). 

 In 1889 Osorio expresses doubt as to the correctness of the label " St. 

 Thomas." 



