4 Proceedings of the Royal Society of Victoria. 



Amphiblestrum concavum, n. sp. (PI. I., Fig. 10.) 



Zooecia of very irregular shape, from triangular to oblong ; 

 surface slightly concave, the niai-ginal portion being raised, 

 especially in the distal part, but not thickened in any way ; 

 opesia also irregular in form, oval to quadrate, margins slightly 

 thickened ; surface covered with minute granulations ; narrow 

 sulci between the zooecia ; avicularia raised, oval, with triangular 

 mandible, a bar and semicircular cavity. 



Locality. — Mitchell River (J. Dennant). 



A single specimen. 



Pyripora catenularia, (Jameson, sp.) 

 In some material from Spring Creek I have found a specimen 

 of this species. Mr. Waters records it from Curdie's Creek in 

 Q.J.G.S., Yol. XXXYIL, p. 323, under the name of Membrani- 

 pora catenularia. Dr. IMacGillivray in P.Z.V., dec. XI., gives 

 reasons for retaining D'Orbigny's genus Pyripora. It is not 

 included in the species described in his monograph. 



Selenaria cpibposa, n. sp. (PI. II., Fig. 11). 



Zooecia irregularly hexagonal, with wide inwardly sloping 

 margins ; aperture arched above, sides and lower margin straight, 

 edges crenulated ; vibracular area very large, cribriform. Dorsal 

 surface furrowed, very slightly granulated. 



Locality. — Gippsland (Rev. A. W. Cresswell). 



In the two specimens I have, the large cribriform vibracular 

 plates (much larger than the zooecia) are mostly broken away, 

 the open spaces show as vacuities sufficiently large to be visible 

 to the naked eye, and give a peculiar spotted appearance to the 

 zoarium. This and the shape of the aperture (opesia) show it to 

 be quite distinct from any other species. 



Caleschapa parva, n. sp. (PI. II., Fig. 12). 



Zooecia ovate, not contracted below ; an open space below the 

 thyrostome, from the thickened lower margin of which a narrow 

 calcareous plate projects, and is united to the underside of the 

 proximal margin of the opening. Ooecia quadrate, but globose. 



Locality. — Mitchell River (J. Dennant). 



