204 A Catalogue of the 



0. dissimilis, Busk B.M.C.,PartI., p.51; P.Z.Y.,45 ; C.R, p. 56. 

 C pisciformis, ^M5^. B.M.C.,PartI.,p. 50; P.Z.V.,45;aP.,57. 

 0. indivi^.a, BicsL B.M.C., Part L, p. 53 ; P.Z.V., 45. 

 Yar. cyathiformis, M^G. P.Z.V., 45. 



C. elegans, -Bwsy^. B.M.C., Part I.,p. 53; PZ.V., 45; C.P., p. 56. 

 0. (Flustra) reticulum, Hinds. A.M.N.H., Aug., 1882; 

 T.R.S.V., Nov., 1884. 

 Port Phillip Heads, J.B.W. 



Euthyris, Hinchs. 



{== Carbasea, part.) 



Zoarium expanded, lobulate, erect. Zooscia in a single layer ; 

 operculum complete, distinctly articulated. OcBcia external, 



E. episcopalis, Bush sp. B.M.C., Part I., p. 52; P.Z.V., 45. 



Spiralaria, Bush. 



Zoarium a narrow, ribbon-shaped lamina, spirally twisted round 

 an imaginary axis. Zooecia entirely membranous in front, in a 

 single layer, opening on the inner surface of the lamina. 

 S. fiorea, Busk. P.Z.V., 46. 



Grasped ozoum, W-G. 



Zoarium erect, in ligulate divisions, uni- or bilaminate, eacL 

 branch bordered throughout its whole extent by a bundle of radical 

 fibres springing from the bases of the lateral zooecia. Zocecia quad- 

 rate, aperture partly filled in by a thickened lamina. Ooecia ex- 

 ternal. 



C roboratum, Hinchs sp. A.M.N. H., Aug., 1881. 

 ( = Membranipora roborata, Hinchs.') 

 C. ligulatum, M^G. T.R.S.Y., Nov., 1885. 

 C. spicatum, M^G. T.R.S.Y., Nov., 1885. 



Port Phillip Heads, J.B.W. 



Family. Farciminariid^. 



Zoarium erect, branched, membranaceous or corneous ; branches 

 cylindrical or prismatic. Zooecia distinct, arranged around an 

 imaginary axis, almost entirely membranous in front j mouth incom- 

 plete, projecting. 



Farciminaria, Bush. 



Zooecia oblong, elongated, closely contiguous, depressed in front, 

 with raised margins ; mouth close to the summit. Avicularia, when 

 present, sessile or sub-immersed at the bottom or on the front of the 

 zooecia. Ocecia prominent, superior. 

 F. aculeata, Bush. B.M.C., Part I., p. 33. 

 F. uncinata, Hinchs. A.M.N.H., Oct., 1884. 



F. simplex, M'G. T.R.S.Y., Nov., 1885. 



