116 A MONOGRAPH OF THE TERTIARY POLTZOA OP VICTORIA. 



13. R. baimsdalei, n.sp. PI. XV., fig. 14. 



Fenestrse elongated, narrower than the trabecular ; the transverse bars joining 

 the branches non-celliferous. Zooecia indistinct, raised anteriorly ; surface smooth, 

 thyrostome (primary) immersed, rounded above with a sinus in the lower lip ; in 

 most zooecia the peristome much produced on one side of the sinus (less on the 

 other), thick, projecting forwards and seemingly (?) having an avicularium on its 

 margin. Dorsal surface finely granular, divided into irregular spaces by narrow 

 vibices. 



B. 



14. R. coriensis, n.sp. PL XV., fig. 19. 



Zoarium branched. Zooecia irregularly rhomboidal or hexagonal, separated 

 by narrow raised lines; surface smooth; thyrostome rounded, straight below; 

 peristome raised, with a stout spine on either side about or a little above the 

 middle ; a linguiform avicularium on its lower edge, the base at the middle of the 

 lower lip and the mandible extending to one side obliquely outwards and down- 

 wards ; a small sessile or immersed avicularium about the middle of the zooecia. 

 Dorsal surface smooth, divided into large irregular spaces by narrow sharp vibices. 



C.B. 



15. R. subimmersa, n.sp. PL XV., fig. 16. 



Fenestras elongated, j)ointed above and below, wider than the trabecular. 

 Zocecia narrow, elongated, separated by narrow raised lines; surface smooth or 

 very faintly granular; thyrostome rounded, peristome thickened, with a distinct 

 rounded sinus interiorly. Ooecia inconspicuous, convex, partly immersed. Dorsal 

 surface smooth or faintly granular, traversed by irregular narrow vibices. 



B. 



16. R. sinuosa, Kirkp. PL XV., figs. 1, la. 



R. sinuosa, Kirkp., A.M.N.H., 1888. 



Zoarium fenestrate ; fenestrse small, elongated, rather narrower than the 

 trabecular. Zooecia irregularly shaped, separated by prominent raised lines ; 

 thyrostome rounded above and finely denticulate or crenulate, with a deep rounded 

 sinus in the lower lip much contracted at its commencement, so as to give the 

 whole a clithridiate aj)pearance ; surface irregular, with scattered elliptical avicularia 

 and pores. Dorsal surface divided by distinct but little elevated vibices, each area 

 with a small rounded or elliptical avicularium. 



S.P. Living. Australia. 



