48 A MONOGRAPH OF THE TERTIARY POLYZOA OP VICTORIA. 



3. S. squamosa, n.sp. PI. VII., figs. 10, 11, 12. 



Selenaria marginata, Waters, Q.J.G.S., Aug. 1881, p. 344; Lunulites initia, 

 Waters, Q.J.G.S., Aug., 1883, p. 442. 



Zoarium small, discoid, slightly convex. Zooecia rounded or ovate, the margins 

 thin, raised, sometimes slightly overlapping the zocecium beyond; lamina finely 

 granular, depressed inferiorly; aperture lofty, arched above, hollowed below; 

 vibracular cells small, irregularly placed among the zooecia, elliptical, cribriform. 

 Dorsal surface divided in an irregularly radiating manner by grooves, between 

 which the surface is convex but not pitted or porous. 



Var. Incens. Vibracular cells finely porous or punctate. Dorsal surface with 

 irregularly radiating and branched grooves, the intervening elevations smooth, 

 shining and glassy. 



S.P. ; M.C.; Bel.; C.C. (W.) Living. Australia. 



Var. pulchella, PL VII., fig. 13. Zooecia broad, rounded or lunate, very little 

 or not at all overlapping ; margins thin ; lamina finely granular ; aperture lofty, 

 wider above, contracted below, the lower edge slightly convex and the angles 

 slightly incised ; vibracular cells about half the size of the zooecia, with a thin 

 margin and finely perforated surface. Dorsal surface of zoarium with radiating, 

 dichotomously divided raised lines, the intervening broad ridges granular and with 

 a few pores. 



Bel. 



I was at first inclined to refer this species to T. Woods' S. marginata, as has 

 been clone by Waters, but the description given by Woods disagrees with it in 

 several particulars and is so imperfect as to make the identification exceedingly 

 doubtful. Under these circumstances I think it advisable to give the present 

 species a different name. 



The vibracular cells vary a good deal. They are occasionally very small, 

 pointed, and with one to three or four seriated pores. These occur not only at the 

 growing edges of the zoarium, but in some specimens also scattered among the 

 internal zooecia. They are usually about half the size of the zooecia, irregularly 

 shaped, with a thin border and the surface finely cribriform. In var. luccns the 

 pores on the vibracularia are very minute, and the surface may be only finely 

 punctate. 



4. S. concinna, Tenison Woods. PL VII., fig. 15. 



Selenaria concinna, T. Woods, I.e., p. 10; Waters, A.M.N. H., Sept., 1887. 



Zoarium discoid, raised in the centre, concave posteriorly. Zooecia arranged 

 in radiating lines, lunate or semicircular, not overlapping; margins thin, crenulated; 



