108 Proceedings of the Royal Society of Victoria. 



bevelled internally. A transverse avicularium, with large 

 rounded mandible, usually on a considerable mound-like 

 elevation, immediately below and to one side of the mouth. 

 Western Port, Eev. Mr. Porter. 



SCHIZOPORELLA SPECIOSA, n. sp., PL V, Fig. -i. 



Zoarium encrusting. Zocecia very irregular in shape and 

 arrangement, indistinctly separated by very narrow raised 

 lines ; surface rough, with hollow granulations ; mouth 

 arched above, iiigher than broad, a distinct, widely open, 

 shallow sinus iu the lower lip. A transverse elliptical 

 avicularium to one side of the oral sinus. Scattered large 

 vicarious avicularia, with very large thin mandibles. Ocecia 

 reniform, witli thickened rim, and several white-bordered 

 pores, or granulations, on the convex surface. 



With age, the zooecia become highly calcified, the oral 

 apertures, however, remaining on the surface ; the peristome 

 at the sides is much thickened and produced ; the rim of the 

 Goecia is thickened, and the pores very marked ; the surface 

 of the zocecia, also, has numerous pores, or areolations. The 

 edges of the vicarious avicularia are thickened and calcareous, 

 the mandibles remaining thin and membranous. 



Allied to Scliizoporella Maplestoiiei, a variety of which 

 has been described by Mr. Hincks from Western Australia 

 as 8. lucida, from which it differs in the suboral sinus being 

 wide and open above, as well as in the peculiar vicarious 

 avicularia. 



Port Phillip Heads, Mr. J. Bracebridge Wilson ; Western 

 Port, Rev. Mr. Porter. 



SCHIZOPORELLA NODULTFERA, n. sp., PI. V, Fig. 5. 



Zooecia somewhat quadrate, separated by narrow raised 

 lines ; surface (young) granular and perforated, when more 

 fully developed with large shining calcareous nodosities ; 

 oral aperture large, nearly quadrate above ; lower lip straight, 

 with a wide rather deep sinus. A broadly elliptical avicu- 

 larium, with large mandible, usually situated transversely 

 below the mouth, on one side. Ocecia subimmersed, with a 

 thickened border, flattened in front, and usually with seveml 

 large white-bordered pores. 



In this very striking species, the young zooecia have the 

 surface granular and nodular, with perforations Ijetween the 

 nodules ; the oral aperture is very large, with a wide sinus 



