62 A MONOGRAPU OF TUB TEllTIAUY POLYZOA OF VICTORIA. 



I have little doubt that the zococia are at first uiiitod hy connecting tubes as in the 

 Diachoridan form of Boania and Mcntbraniponi radicij'cra. 



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

 Ml-. T. S. Hall, well knoAvn for his geological researches, to Avhom I am indebted for 

 many valuable contributions. 



2. n. monoceros. Busk, sp. PI. VIII., fig. 22. 



Lepralia monoceros, Busk, B.M.C., Pt. I., p. 72 ; id., C.P., Pt. I., p. lo3 ; 

 McG., P.Z.V., 35 ; Cribrilina monoceroa, llincks, A.M.N.H., July, 1881 ; id., Oct., 

 1881; id., Dec, 1891; McG., P.Z.V., 187; Waters, Q..T.G.S., 1882, p. 507; Amch. 

 nopunia munoceron, .TiilHeii, Caj) Horn Bryozoaires, p. 02. 



Zoa>cia indistinci, with numerous large pores; thyrostomc arched above, lower 

 margin straight, or with a central pointed mucro ; a round pore, marking th(^ 

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



M.C. ; ]}.(AV.) 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 zoa-cia, as seen through 

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

 radical tubes. 



Z. n. ma(jiia,n.i^l). PI. VIII., fig. 23. ' ■ /, f'^'v''^'^ 



ZotLcia large, broadly ovate, sirparated by narrow, raised margins; surface Avith 

 iimiierous large, rcmnd pores; thyrostomc wide and lofty, arched above, lower 

 margin straight, with a slight mucro in the centre. Dorsally the zooicia are 

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



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

 layer of zocecia, the zoai'ium being reaUy bilaminate. 



M.C. 



I refer this species very doubtfully to the present genus. 



1. II. Ucersklgei, Tenison "Woods, sp. PI. IX., figs. 21, 22. 



Eschum Ik-ersidgei, Tenison Woods, T.B.S.N.S.W., 187(3, p. US); Jlicropo- 

 rella ferrea. Waters, Q.J.G.S., 1881, p. 33U; var. porosa. I.e., 1882, p. 207; 

 Macronella mmvonata. Waters, I.e., 1881, p. 328. 



Zoarium bilaminate, branched. Zocrcia iiulistinct, surface irregular; usually 

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



