BY W. A. HASTTELL, M.A., B.SO. 41 



rostrum. An ovate avicularinm on the inner aspect of th e rostrum 

 and others of various sizes and shapes scattered over the zoarium. 



48. Eschara hexagonalis, sp. noi\, Plate III., figs. 1 and 2. 



Branches narrow, strap-shaped. Cells hexagonal, separated 

 by a distinct depressed line, punctate or smooth. Mouth nearly 

 circular, a round aperture below it ; cell- wall bulging below, the 

 prominence armed with a narrow pointed avicularium. 



49. Eschara umbonata, sp. 7wv., Plate II., figs. 5 and 6. 



Cells not defined ; mouth varying in form, the lower lip some- 

 times straight, sometimes with a small sinus, sometimes with a 

 rounded central lobe. Surface ornamented with numerous rounded 

 knobs of various sizes, and small scattered avicularia. [Small 

 pieces only]. 



50. Hemeschara australis, sp. nov., Plate II., figs. 7 and 8. 



Zoarium branching, arborescent. CeUs oblong, defined 

 anteriorly by narrow raised lines, scarcely separated laterally ; 

 surface uniformly punctate. Mouth surrounded by an obscure 

 raised rim which is beaded below ; an open sinus, in the lower lip. 



51. Petepora cellulosa, Jameson, (sp.) 

 Hal. Port Denison ; Holborn Island. 



52. Yincularia novse-hollandiae, sp. nov., Plate IH., fig. 3. 



Zoarium dichotomous, branches sub-compressed. Cell oblong, 

 surrounded by a finely-beaded raised rim ; mouth circular ; 

 anterior surface of cell, granular, much depressed near the mouth 

 and perforated in that situation by two large ovate apertures 

 which are sometimes closed by a thin membrane. 



53. Conescharellina ? depressa, sp. nov., Plate III., fig. 4. 

 Zoarium depressed-conical, with toothed edges formed by the 



projecting outer ro^ of cells. CeU-aperture oyate — the long axis 



F 



