24 Proceedings of the Royal Society of Victoria. 



however, from that species in the zooecia being much longer, and 

 in having the surface covered with tubercles instead of " rounded 

 deep pits," and the large peristomial pore is not simply 

 " rounded," but is transversely elliptical, with a curved over- 

 arching upper margin or lip ; a side view of it is shown on the 

 left side of the figure near the bottom of the upper left-hand 

 zooecium, and it is clearly quite different from that of P. 

 cribraria. 



Lagenipora mopningtoniensis, n. sp. (PI. II., Fig. 16). 



Zooecia ventricose, surface granulated, with median or lateral 

 ribs. Thyrostome suborbicular ; peristome elevated distally, and 

 laterally forming an irregularly trilabiate orifice ; a round 

 avicularium at the end of a subtubular process, adherent to the 

 wall of the zooecium. 



Locality. — Moz'nington (T. S. Hall). 



The shape of the zooecium and the irregularly elevated 

 peristome are very similar to L. simplex, McG. 



Lagenipora airensis, n. sp. (PI. II., Fig. 17.) 



Zooecia ventricose ; a slightly -raised scutiform area below the 

 thyrostome, radially divided into subtriangular elevations, below 

 which are sometimes one or two ribs enclosing a subtriangular 

 area. Thyrostome orbicular or horseshoe shaped with a sinus at 

 each proximal angle ; peristome elevated distally, and laterally, 

 forming a trilabiate orifice. 



Localities. — Aire Costal Beds (Hall and Pritchard) ; Mitchell 

 Hiver (J. Dennant). 



This is a remarkable form, and in some respects resembles 

 L. morningtoniensis, but it is much larger ; the peristome rises 

 round the thyrostome in collar-like elevations, distally and 

 laterally ; there are one or more ribs on the front of the cell. I 

 have several specimens, and they show considerable variation 

 owing, chiefly, to the difference in the zoarial growth. The 

 specimens from which the figures are taken are from the Aire 

 Coastal Beds, they are glomerate, and were chosen for illustration 



