130 A MOXOGRAPII OF THE TERTIARY POLYZOA OF VICTORIA. 



Stoma tnpnr;i, Brovn. 



Zonrium adnatc, simple oi- ivnigiilarly l)i"anclie(l ; bvanclirs linear ov ligulate. 

 Zotecia in simple series oi' in more or less rei^ular transverse rows. 



1. S. ma'au(h-iu<i, n.s]). PI. XX., fii;'. 2. 



or this 1 have only a single specimen growing over a lletepore. It forms a 

 long curved zoarium, conv(>x. At the gi-owing extremity the zooccia arc separated 

 liy nari'ow grooves or depi-essions ; at tiie ruUy-formed ])arts tlicy ai'e vei-y indis- 

 linclly arranged, confused (ii- s(>paratod oidy by very faint raised lines. The surface 

 is smooth or dcmsely minutely granular. The thyrostomes arc circular, the peristome 

 thicl<(med and turned al)ruptly forwards and produced. The inner surface is spinous 

 hut without distinct denticles or processes. In the growing part there is a very 

 narrow thin l)asis projecting beyond the edge. 



B. 



2. S. (irwiiiala, McG. PL XX., fig. 1. 



S. gominala, McG., P.Z.Y., pi. 17G; /</., T.R.S.V., XXIII., 1886, p. 36. 



Zoarium branched; l)ranches narrow, consisting of series of pairs of zocccia. 

 ZooDcia vei*y long, narrow, closely united throughout their whole length ; surface 

 minutely granular; tliyrostomc projecting and turned forwards, circidar. 



M.C. Living. Victoria. 



Diastopora, John nt on. 



Zoarium adnate, discoid or t^abelliform or lobed, or wholly or jiartly raised and 

 bilaminate. Zooecia lul)ular, witli an elliptical or subcircnlar thyrostome, crowded 

 and immersed towards the centre, more distinct and partially free towards the 

 margins. 



1. J), dificoidra, n.sp. PI. XX., fig. 3. 

 (For description see Appendix.) 



2. n. palhui, Lamk. PI. XX., figs. 4, 5. 



I>imtopo)-a pallna, Iliucks, B.M.P., 458; Busk, B.M.C., III., 28; McG., C.V., 

 32, ; id., P.Z.V., XV. 



Zoarium thin, crustaceous. Zocecia decumbent and adherent except at the 

 extremities, which are free and slightly turned forwards; thyrostomes elliptical. 



