Zoology.'] 



NATUKAL HISTORY OF VICTORIA. 



[Polyzoa. 



Explanation of Figures. 



Plate 48. — Fig. 8, specimen, natural size. Fig. 8a, portion, magnified. Fig. 8b, small 

 portion, more highly magnified, one cell still covered with the membranous layer, the other 

 showing the calcareous lamina and denticulate openings. The small round prominence above 

 the cell on the left has the margin too distinctly rimmed. Fig. 8c, group, to show the ovicell. 

 The cells, except the anterior part of that with which the ovicell is incorporated, are still covered 

 with membrane, and the large operculum of the large cell is seen projecting below the opening 

 of the ovicell. Fig. 8d, small group, to show the anterior membranous part. There is frequently 

 a much larger portion occupied by membrane than is here represented. 



All the Escharidce on this plate have been described, and 

 specimens of each presented to the National Museum, by Mr. 

 MacGillivray. 



Frederick McCoy. 



[46] 



