ON SOME TEETIAET AUSTEALIAK" POLTZOA. 149 



EscHAEA LiVEESiDGEi, U.S. 'Fig. XI, iiat. size ; fig. XII, 

 magnified ; fig. XIII, liigUj magnified. 



Polyzoary expanded, cells obscure, mouth rounded above, 

 expanded below, underneath three large pores disposed in a 

 triangle, or two above and one below ; on each side of the lower 

 one obscure pores may be traced ; lower lip of orifice with a 

 narrow sinus. Mount Grambier ; not common. 



I have dedicated this species to your Secretary, the learned 

 Professor of Mineralogy. 



EsCHAEA OCIJLATA, U.S. Eig. XIY. 



Polyzoary expanded or dichotomously branched, cells much 

 raised, subtubular, and covered with irregularly- shaped pores of 

 various sizes disposed unsymmetrically ; mouth circular, simple. 

 The irregularity on the pores of this species makes it difficult to 

 recognize if it is at all worn. In the old specimens they coalesce 

 and look like mouths, in the younger species it appears as if 

 there were always three oval pores radiating symmetrically from 

 the mouth. Mount Grambier -, common. 



EsCHAEA TaTEI, U.S. Eig. XY. 



Polyzoary dichotomously marked with elongated cells sur- 

 rounded by a raised margin, which is expanded above, and 

 slightly concave about the mouth ; two rows of pores with four 

 or five in each ; mouth round, with a raised margin, which is 

 sinuated below. 



Observation. — This fossil when worn and the mouth obliterated 

 shows only the raised margin of the cell with the pores enlarged, 

 so as to form a kind of net-work in front. The pores sometimes 

 join to form one row at the base of the cell if it is narrow, 

 which, as the cells are crowded and not regularly quincuncial, is 

 frequently the case. 



This species I have dedicated to Professor Tate, of the Adelaide 

 University. 



EscHAEA BrsKii, n.s. Eig. XYI highly magnified, fig. XA^I 



nat. size. 



Polyzoary expanded, branched ; the branches lobate, cella 

 quincuncially arranged ; mammillated so as to make a rounded 

 raised margin to the cells, which gives the frond a warty 

 appearance, very porous, with three larger pores on the inferior 

 lip triangularly disposed, orifice round and immersed. A ver/ 

 common fossil at Mount Grambier. 



I have named this species after Professor Gr. Busk, E.E.S., &c., 

 the greatest living authority on Polyzoa, and almost, we may say, 

 the founder of its classification. 



