OF CONCHOLOGY. 9 



Muretia, D'Orb., Voy. Amer. Meridionale, v, pp. 470, 682 



(pars). 

 Siplionaria, D'Orbigny (non Sby.), Ibid. pp. 470, 682, 741. 

 Clypem^ Scacchi (non Brod.), Osserv. Zool. 1833. 

 G-ardinia, Pictet, Traite de Paleon. vol. iii, p. 293, 1855. 



(err. typog.) 

 Rowellia, Cooper, Proc. Cal. Acad. Nat. Sci. 1865, p. 188. 



(= G-adinia jun.) 

 Gadinia, H. & A. Adams, Gen. Rec. Moll, i, p. 463. Chenu, 



Man. de Conchyl. i, p. 375, et auctores omnes nov. q. v. 

 Pileopsis (sp.), Payr, (non Lam.), Catal. 1836. 

 Lepas (sp), Adanson, Hist. Nat. du Senegal, 1757, p. 33. 

 Patella (sp), of the older authors. 



Testa univalvis, non symmetrica, oblique conica ; vertice ob- 

 tuso, subpostico apertura suborbiculata, irregularis ; cavitas sim- 

 plex, sulco in latere dextro, prope limbum anticum impressionis 

 muscularis ; impressionis muscularis elongata arcuata submar- 

 ginalis. (Gray.) 



Animal pulmone distincto prseditum, branchiis nuUis ; rostro 

 bifido, infundibulato. 



Type. 

 Gadinia afra, Gray. 



Patella afra, Gmelin, 3715. Dillwyn, Rec. Shells ii. 1046. 



Hanley's Wood's Index Testae, pi. xxxvii. fig. 65a. 

 G-adinia afra, Gray, Tilloch's (London) Phil. Mag. Ixiii, 1824, 



pp. 274, 277. Isis, von Oken, Heft, v, col. 460, 1834. 



H. and A. Adams, Gen. Rec. Moll, i, p. 463, vol. iii, pi. 



Iii, fig. 8, a. Chenu, Man. de Conchyl, vol. i, p. 375, fig. 



2818. 

 Lepas gadin, Adanson, Hist. Nat. du Senegal, (Genus Lepas, 



species " Le Gadin "), p. 33, pi. ii, fig. 4. 



G. afra testa oblique conica, alba, radiatim striato-costata, 

 subsquamosa, vertice subljBvi, marginibus crenulatis. 



Hah. West coast of Africa. 



This is the typical species. The name of the genus is derived 

 from Adanson's trivial name. He found it on the rocks of the 

 island of Goree and at Cape Manuel on the adjacent coast of 

 Africa. He says they were particularly abundant from January 

 until May. At that time they may change their station for the 

 pnrpose of depositing their ova. He does not describe the 

 animal. 



