272 RECORDS OF THE AUSTRALIAN MUSEUM. 



The pores on the surface of the zooecia are not always open ; 

 many are closed with a calcareous layer which in some bears a 

 small perforation ; the margins of the pores are very slightly 

 raised and expanded, showing a suture between them. The 

 thyrostomes are very irregular in shape owing to the presence 

 sometimes of more than one mucro ; the avicularia have a semi- 

 circular cavity and lateral processes at the basal end. 



Cellepora doliaris, sp.nov. 



(Plate lxxviii., figs. 10a, 10b.) 



Zoaria encrusting. Zooecia harrel-shaped, with encircling ribs, 

 with small pores in the depressed spaces between the ribs ; closely 

 aggregated. Thyrostomes orbicular. Peristomes thickened, with 

 broad, flattened spines surrounding the thyrostomes. Small 

 cornucopia-form avicularia between the zooecia. 



Obs. — A very singular species. The upper surface shows a 

 series of orbicular thyrostomes surrounded by high, flattened 

 spines, and a few small cornucopia-shaped avicularia. The side 

 view shows it as an aggregation of annulated barrels with a row 

 of small pores between the rings with the funnel-like avicularia. 

 The annulated and perforated side walls are very distinctive 

 features. 



Zeuglopora, gen.nov. 



Zoarium bilaminate, lanceolate. Zooecia on both surfaces, 

 immersed, undefined. Thyrostome suborbicular, with a raised 

 semi-elliptical ridge on proximal margin. 



Obs. — This is a very interesting form of an escharine char- 

 acter. The shape of the zoarium is very like a long lanceolate 

 leaf with crenulated edges. The thyrostome with the semi- 

 elliptical ridge extending up each side is very distinctive and 

 warrants the establishment of a new genus for its reception. 



Zeuglopora lanceolata, sp.nov. 



(Plate lxxviii., tig. 11.) 



Zoarium bilaminate, lanceolate, with crenulated edges. Zooecia 

 on both surfaces, immersed, totally undefined ; surface covered 

 with scattered mamillations and some small oval avicularia. 

 Thyrostome suborbicular with a raised semi-elliptical ridge on 

 the proximal margin and extending about half-way up the sides. 

 Under the microscope the cumulated edges of the zoarium are 

 seen to be due to the projecting parts of the marginal zooecia. 



