46 A MONOGRAPH OF TUE TERTIARY POLYZOA OF VICTORIA. 



1. L. fjifonnis, n.sp. PI. XXII., fig. 13. 



Zoariiiui circular, slighlly raised in the centre. Zoctfcia in regular radiating 

 series, distinct, slightly raised di.stally ; margins granular, sloping inwards at the 

 sides; area in outer zou'cia entir(>ly open, in the central zoa'cia largely filled in by 

 a depressed strongly granular calcareous lamina ; \ ibracularian colls situated at the 

 base of an intercalated series of zoiecia between two zofecia of the contiguous 

 roAvs, elongated, the opening roiuided pro.ximally and ex2)anded distally, with a 

 sharp process projecting inwards from one side. Dorsal siu'facc concave, with 

 radiating ridges, corresponding to the series of zotecia, nodular and with large 

 central pores, separated hy narrow raised lines. 



Cai)c Otway, Mr. Dennant. 



1 am indebted to Mr. Dennant lor two perfect specimens of this line species, 

 in both, the marginal zorocia have the same structiu'e as those of the other species 

 of the genus as here adopted. In all ol' those, however, occupying the central part 

 of the zoariuni the front is largely tilled in by a granular calcareous layer formed 

 by an overgrowth from the margins. 



5. .'' L. anffiUojiora, Tenison Woods. PI. VIII., fig. 1. 



.'' Lnnulites amjulopora , T. Woods, I.e., p. 7 



I have two small fragments, the position of which is very doubtful, but which 

 may be referahle to this species. The larger piece is that figured. It has portions 

 of three rows of quadrate cells distinct throughout their whole thickness. On one; 

 asjicct (the front) arc seen tAvo zoojcia, slightly depressed below the margins, the 

 surface being finely granular. The apertia-e is broadly triangular or sub-trifoliate, 

 the edges distinct and the lower part with a thickened rim ; to one side are two 

 rows of two narrow cells, each cell having a long linear opening dcjwn the centre, 

 slightly enlarged helow, and Avith distinct smooth margins. On the other 

 (posterior) aspect, the cells are uniform in three roAVs, smooth and each having a 

 large opening, Avide and slightly arched above, contracting hy straight sides to the 

 junction of the middle and loA\er thirds, where there is on each side a sharp denticle 

 helow which the o^iening again contracts to form a bluntly angular sinus. These 

 are probably avicidarian. 



Selenaria, Buslc. 



Zoarium more or less orbicular, convex on the frontal side, ])lane or concave on 

 the dorsal Avhich is usually radiately grooved. Zo(ecia broad, ("X[)anded, arched 

 ahove and usually contracted below ; margins thin ; lamina occupying greater part 



