LICHENOPORIDJS. 471 



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

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

 it less uncommon in Shetland. 



GEOGRAPHICAL DISTRIBUTION. (Esterraat, 70-80 

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

 on Oculina, 150-200 fathoms (Sars) : off Bergen (Hoegh). 



Family IV. Lichenoporidae. 



DISCOPORAD.E, Busk, Brit. Cyclopaod. 

 CAVEID-* (part,), D'Orbigny. 

 Trni<;Ei:u>.E (part.), id. 

 LniiFNOPOBiDjE, Smitt. 

 DISCOPORELLID.E, Busk, B.M. Cat. 



ZOARIUM discoid, simple or composite, adnate, or partially 

 free and stipitate. ZO<ECIA tubular, erect or suberect, 



disposed in more or less distinct series, which radiate 

 from a free central area; the intermediate surface 



cancellated or porous. 



Genus LICHENOPORA, Defrance. 



Der. From \et\i]v, lichen, and Tropos. 



MADREPORA (part.), Fabr. : Esper. 



LICHEN.. I-OBA, Defrance (1823): Blainvillc: Michelin : Smitt (1878). 

 DISCOPOBELLA, Gray, B.M. Rid. : Busk: Smitt (1866). 

 DIBCOPORA (part.), Flem. : Busk, Encyclopaed. Brit, 



I.IPORA (part.), Johnston : auctt. 

 MELOBESIA, Audouin. 



RADIOI-ORA, D'Orbigny (for species with confluent dinks). 

 UXICAVEA (p.), id. 

 DISCOCAVKA (sp.), id. 

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



DlSCOTVBIGERA, id. 



HETEROPO BELLA (p.), Hincks. 



GENERIC CHARACTER. ZOARIUM discoid, raised, simple, 



