LIC1IEN0P0RID.1:. 471 



Localities. Shetland, about 7miles E.S.E, from Balta, 

 in about 50 fathoms, rare (A. M. N.)- Mr. Peach found 

 it less uncommon in Shetland. 



Geographical Distribution. ffisterraat, 70-80 

 fathoms ; Christiansund, &c., 70-100 fathoms ; Mauger, 

 on Oculina, 150-300 fathoms (Sars) : off Bergen (Hoegh). 



Family IV. — Lichenoporidae. 



DiscoPORADxE, Busk, Brit. Oyclopaid. 

 CAveid.e (part.), D'Orbigny. 

 TuBiGEiUD.E (part.), id. 

 LiciiENOPORiD^, Smitt. 

 DiscopoRELLiD-E, Busk, B.M. Cat. 



ZoARiUM discoid, simple or comjwsite, adnate, or jmrtially 

 free and stipitate. Zocecia tubular, erect or suberect, 

 disposed in more or less distinct series, which radiate 

 frotn a free central area; the intermediate surface 

 cancellated or porous. 



Genus LICHENOPORA, Def ranee. 



Der. From Xeix'iv, lichen, aud TTopos. 



Madrefora (part.), Fabr. : Esper. 



LiCHENuPORA, Defrance (1823) : Blainville : Michelin : Smitt (1878). 



DiscoPORELLA, Gray, B.M. Kad. : Busk: Smitt (1866). 



DiscorORA (part.), Flem. : Busk, Encyclop;i;d. Brit. 



TuBULiPORA (part.), Johustou : auctt. 



Melobesia, Audouin. 



Eadiopora, D'Orbigny (lor species with coufluent disks). 



Unicavea (sp.), id. 



DiscocAVEA (sp.), id. 



AcTiNOPORA, id. (for adnate species with multiserial rays). 



DiSCOTUBIGERA, Id. 

 llETEROPORELIiA (sp.), Hincks. 



Generic Character. — Zoarium discoid, raised, simple, 



