A MONOGRAPH OF THE TERTIARY POLYZOA OF VICTORIA. 47 



of the area, depressed, slightly rising to the aperture. Vibracularia irregularly 

 distributed or arranged in lines between the zocecia. 



In several of the species of this genus, the aperture is occasionally partly or 

 wholly filled by a calcareous overgrowth which commences sometimes at the upper 

 and sometimes at the lower edge. 



1. S. maculata, Busk. PL VII., figs. 5, 6, 7. 



Selenaria maculata, Busk, B.M.C., II., 101; Waters, Q.J.Gr.S., 1883, p. 440, 

 Aug., 1885, p. 309; A.M.N.H., Sept., 1887, p. 201; S. alata, T. Woods, T.B,.S.S.A., 

 1879, p. 11 ; Waters, Q.J.G.S., Aug., 1881, p. 345. 



Zoarium discoid, elevated towards the centre. Zocecia in more or Jess radiating 

 lines, separated by prominent raised margins, broad, arched above, contracted below, 

 concave and finely granular; aperture rounded above, the lower angles deeply 

 incised so as to make the whole almost trifoliate ; vibracular cells large, rounded, 

 with distinct narrow margins, cribriform, encroaching on the zoarium above. 

 Dorsal surface of zoarium with narrow, branched, radiating, raised lines, the spaces 

 between the lines convex, granular and nodulated, and with numerous distinct 

 pores. 



S.P. ; M.C. ; Belm. ; G. ; L.B. ; W.P. (W.). Becent Australia. 



The markings on the posterior ridges vary a good deal. They are sometimes 

 entirely granular and nodular, but there are usually numerous irregular pores ; 

 occasionally (fig. 7«) these pores are large, very numerous, closely crowded and 

 occupying the whole surface. 



2. S. punctata, Tenison Woods. PL VII., figs. 8, 9. 



Selenaria punctata, T. Woods, I.e., p. 9; Waters, Q.J.G.S., Aug., 1883, p. 440; 

 A.M.N.H., Sept., 1887, p. 201; S. fenestrates, Haswell, Pr. Linn. Soc. N.S.W., 1880, 

 p. 42. 



Zoarium discoid, convex. Zooecia in irregularly radiating series, rounded, 

 wider above, lamina finely granular, inferior and lateral parts depressed, rising to 

 the aperture below which on each side is a large stellate pore; aperture large, 

 rounded above, straight or slightly hollowed below ; vibracular cells large, with a 

 distinct margin, cribriform. Posterior surface of zoarium with radiating convex 

 ridges, with large round pores, and separated by deep furrows at the bottom of 

 which are narrow raised lines. 



M.C. ; L.B. ; W.P. (W.) Becent New South Wales. 



Differs from S. maculata, to which it is closely allied, in the large size of the 

 zocecia and the two stellate pores below the aperture. 



