26 THE VOYAGE OF H.M.S. CHALLENGER. 



(1) Lichenopora Jlmbriata, Busk. 



Discoporella jimhriata, Bk., Brit. Mus. Cat., pt. iii. p. 32, pi. xxvii. 



Character. — Zoarium stibconical or hemispherical; zocecia indistinctly serial, distant; 

 interstitial cancelli or pores small, circular, often more or less obsolete ; orifice somewhat 

 expanding ; peristome fimbriate, with a variable number of pointed teeth. 



Habitat. — Off Nightingale Island, Tristan da Cunha, 100 to 150 fathoms. 



[Chonos Archipelago, 13 fathoms ; Tierra del Fuego, Cape Horn, 40 fathoms ; Chiloe, 

 96 fathoms, Darwin ; Tasmania, Mr. Smith.] 



(2) Lichenopora hispida, Fleming (sp.). 



Diseoporahispida, Fleming, Blainville, Couch.. 



Tubulipora hispida, Johnst. 



Discoporella hispida, Gray ; Busk, Crag Polyzoa, p. 115, pi. xviii. fig. 5 ; Brit. Mus. Cat., 



pt. iii. p. 30, pi. XXX. fig. 3 ; Smitt, Sars, Alder, &c. 

 Heteroporella radiata, Bk., Crag Polyzoa, p. 127, pi. xix. fig. 2. 

 Heteropiirella hispida, Hincks, Ann. and Mag. Nat. Hist., ser. 3, vol. ix. p. 469. 

 Lichenopora hispida, Hincks, Brit. Mar. Polyz., p. 473, pi. Ixviii. figs. 1-8. 



Charcter. — Zoarium suborbicular, convex, with or without a narrow marginal 

 lamina ; surface uniformly covered with circular openings level with the surface, of 

 tolerably uniform size ; towards the border some of the orifices raised, subtubular, and 

 bi- or tridenticulate, disposed in obscure irregular series. 



Habitat. — Stations 135 to 135g, Tristan da Cunha, 100 to 1100 fathoms. 



[British Coasts, north and south; Northern Seas, Greenland, Labrador, &c. (fossil. 

 Coral Crag ; Post Pliocene, Canada).] 



, Family VI. Frondiporid^, Smitt. 



Fasiculinea (pars), d'Orbigny, Smitt, 1866. 



Fascigeridx (pars), d'Orbigny. 



Froridiporidx, Smitt, Kritisk Forteckn., pp. 407,408 (1866); Busk, Brit. Mus. Cat., pt. iii. 



p. 37. 

 Cerioporidx (pars). Busk, Crag Polyzoa, p. 118. 

 Cerioporinx (pars), Hagenow. 



Character. — Zoarium massive, stipitate, simple or lobate, or ramose. ZocBcia connate 

 throughout, aggregated into fasciculi ; lumen of tubes angular ; walls finely porous ; sides 

 of lobes or fasciculi faintly striated or subporcellanous ; no intermediate pores or 

 cancelli. 



