V 



A MONOGRAPH OF THE TERTIAKY POLYZOA OP VICTORIA. 79 



28. L. vallafa, n.sp. PI. X., fig. 19. 



Zoa3cia elongated, wider in the middle, nearly straight above and Ix^low, 

 separated laterally by thick much-raised margins; surface with numerous small 

 round pores ; thyrostomc large, contracted below to the lower lip, which is slightly 

 elevated in the centre ; peristome thickened, especially below where it supports an 

 avicularium. / 



' ^' '''■■ ,H, 



Only the fragment figured and another smaller seen, but it seems very distinct 

 from any other species. 



Bulbijiora, n.g. 



Zoarium encrusting. Zoo3cia with posterior part decumbent, anterior portion 

 raised, much enlarged and turned forwards ; thyrostonie terminal, arched ;il)ove, 

 lower lip straight or nearly so, and entire. 



1. B. areolata, n.sp. PI. XIII., fig. 15. 



Zoa^cia distinct, narrowed posteriorly, a row of deep areolations along the 

 margin leaving a central smooth space ; anterior half swollen and bulbous, directed 

 forwards, smooth ; thyrostome large, rounded above, slightly narrowed below, the 

 lower lip straight or very slightly projecting ; several spines on the uppcn- margin. 

 Ooecia round, smooth, situated above the thyrostome and incorporated with the 

 zooecium above. 



M.C., on a Retepore. 



Plagiopora, n.g. 



Zoarium erect, unilaminate, biserial. Zoweia with the thyrostome placed 

 obliquely across the extremity, lofty, narrow, arched above, hollowed below and 

 contracted abovit the junction of the middle and lower thirds ; distinctly separated 

 behind ; an avicularium in front to the side of the thyrostome and one externally 

 beneath the upper angle. 



1. P. disticha, n.sp. PI. XIII., fig. 14. 



Zoarivim in narrow, unilaminate, biserial branches. Zocecia alternate, the inner 

 borders forming a zigzag line down the centre of the branch ; each zooecium wider 

 and more prominent above, the inner part inserted between two zocecia of the 

 opposite series ; the lower part depressed, hollowed and smooth, an oblique vitta-like 

 baud, with a row of small inconspicuous pores, separating this from the ujjper more 



