62 A MONOGRAPH OF THE TERTIARY POLTZOA OF VICTORIA. 



I have little doubt that the zooecia are at first united by connecting tubes as in the 

 Diachoridan form, of Beania and Membranipora radicifera. 



I have much pleasure in associating with this interesting species the name of 

 Mr. T. S. Hall, well known for his geological researches, to whom I am indebted for 

 many valuable contributions. 



2. H. monoceros, Busk, sp. PL VIII., fig. 22. 



Lepralia monoceros, Busk, B.M.C., Pt. I., p. 72 ; id., C.P., Pt. I., p. 133 ; 

 McGr., P.Z.V., 35 ; Cribrilina monoceros, Hincks, A.M.N.H., July, 1881 ; id., Oct., 

 1884 ; id., Dec, 1891 ; McG., P.Z.V., 187 ; Waters, Q.J.G.S., 1882, p. 507 ; Arach- 

 nopusia monoceros, Jullien, Cap Horn Bryozoaires, p. 62. 



Zooecia indistinct, with numerous large pores ; thyrostome arched above, lower 

 margin straight, or with a central pointed inucro ; a round pore, marking the 

 articulation of a spine, at one angle within the peristome. 



M.C. ; B.(W.) A common living Australian and New Zealand species. 



The specimens are in a very imperfect state, but there is no doubt of the 

 identification. For description of recent specimens see P.Z.V. To this I may add 

 that in a very perfect specimen the posterior surface of the zooecia, as seen through 

 the fenestra of a Betepore in which it grows, are furnished with distinct calcareous 

 radical tubes. 



3. K. magna, n.sp. PL VIII., fig. 23. 



Zooecia large, broadly ovate, separated by narrow, raised margins ; surface with 

 numerous large, round pores; thyrostome wide and lofty, arched above, lower 

 margin straight, with a slight inucro in the centre. Dorsally the zooecia are 

 obscurely hexagonal, with thin perforated raised margins, the surface smooth. 



The separate margins seen posteriorly may possibly be the bases of another 

 layer of zooecia, the zoarium being really bilaminate. 



M.C. 



I refer this species very doubtfully to the present genus. 



4. R. liversidgei, Tenison Woods, sp. PL IX., figs. 21, 22. 



Eschara liversidgei, Tenison Woods, T.B.S.N.S.W., 1876, p. 119; Micropo- 

 rella ferrea, Waters, Q.J.G.S., 1881, p. 330; var. porosa, I.e., 1882, p. 267; 

 Mucrouella mucronata, Waters, I.e., 1881, p. 328. 



Zoarium bilaminate, branched. Zooecia indistinct, surface irregular ; usually 

 3-5, occasionally one or two, pores of varying size, and mostly having a small, simple 



