On Some ISew Species of Catenicella and Dictyopora, &c. 85 



part triangular, with the point directed upwards and out- 

 wards. In the outer edge, immediately below the partition, 

 is a small avicularian cup. Back of cell minutely sulcate. 

 Port Phillip Heads, Mr. J. B. Wilson* 



G. Wilsoni. 



Cells large, squared at both ends. Mouth deeply arched 

 above, the lower lip straight and entire. A space down the 

 centre of the cell, of the same width as the mouth, occupied 

 by a double row of (usually) 7 large, closely set, shallow 

 fenestras. The sides slope backwards, from the margin of 

 the fenestrate area, leaving on each side a smooth, slightly 

 hollowed space, nearly as wide as the central division, with 

 an avicularian chamber at the upper angle. Back of cell 

 with a prominent central band extending the whole length, 

 and at about a third of the distance from the top, giving off 

 a similar transverse band on each side. Ovicell large, 

 galeate, terminal, thickly fenestrate. 



Port Phillip Heads, Mr. J. B. Wilson. 



Family, ? 



Genus, Upceolipora. 

 Polyzoary continuous, dichotomously-branched ; cells 

 urceolate, alternate, in a more or less regular double series, 

 the front of the cells being directed outwards. Ovicell galeate, 

 surmounting a cell and united to the base of the cell above. 



U. nana. 

 This species forms small, dichotomously-branched, rigid 

 tufts, about half an inch high, growing on Retepora and 

 other Polyzoa. The cells are alternately arranged in a 

 double row, the fronts facing outwards. They are urceolate, 

 much elongated and narrowed downwards. The mouth is 

 terminal, opening almost horizontally upwards, and at each 

 side is a small projecting process. The ovicell is of moderate 

 size, galeate, surmounting a cell opening and incorporated 

 with the base of the cell above ; surface minutely cribriform, 

 or marked with radiating, beaded lines. 



Family, ESCHARIDjE. 

 Genus, Dictyopora. 

 D. Wilsoni. 

 Of this species I have only seen one specimen. It consists 

 of a tuft of four separate plates, the stems arising from the 



* This species may prcrve to be identical with Maplestone's C. fiilchella, 

 the figure of which it much resembles, but the ornamentation in front of 

 which is described as consisting of round bosses. 



