Art. XIX. — FurtJier Descriptions of the Tertiary Poly zoo- 

 of Victoria. — Part III. 



By C. M. MAPLESTONE. 



(With Plates XVII. and XVIII.). 

 [Eead 14th December, 1899.] 



Bigemellaria pedunculata, McG. (PI. XVII., Fig. 1), 



Dr. MacGillivray states in his Monograph that none of his 

 specimens of this species showed the upper termination of the 

 zoarium. I have found a specimen showing it, but the lower 

 portion is broken off. 



The zoarium terminates with two zooecia, between which is a 

 triangular area ; a ridge on each side extends from the upper 

 part of the thyrostome of one zooecium to that of the other, just 

 below which, in the median line, is a small circular opening 

 indicating that the zoarium, when perfect, consisted of inter- 

 nodes as in Cellaria, and that it was branched dichotomously. 



Liriozoa laevigata, Waters, sp. (PI. XVII., Fig. 2). 



I have found many specimens of this species of which Dr, 

 MacGillivray found only two, and while his figure is much 

 better than that of Mr. Waters in Q.J.G.S., 1882, pi xii., it does 

 not show any perforations in the wall of the zooecia nor does 

 he mention them in his description. Mr. Waters describes the 

 zooecia as "coarsely punctate," but also says "dorsal and anterior 

 surface smooth." Some of my specimens are perfectly smooth, 

 without any perforations and agree with Dr. MacGillivray's 

 description and figures. Others have a few scattered perfora- 

 tions (or rather minute circular depressions, as they do not 

 extend far down in the cell wall) over the zooecia with two 

 rows of perforations on the back of the central zooecium, but 

 I have met with none that T would call " coarsely punctate." 



