A MONOGRAPH OF THE TERTIARY POLTZOA OE VICTORIA. 49 



lamina finely granular ; aperture higher than wide, the sides nearly straight, lower 

 edge nearly straight or slightly hollowed ; vibracular cells narrow, elongated, raised, 

 a narrow slit with serrated edges in the centre closed towards the extremity, 

 vibracular pit large encroaching on the zocecium in front. Dorsal surface with 

 narrow, raised, radiating, dichotomously divided lines, the intervening spaces 

 nodular or granular with irregular or round pores. 



M.C. ; G. ; L.B. Living. Port Jackson. 



At once distinguished by the well marked characteristic vibracularia. I am 

 not quite sure that Waters' species is the same, as the vibracularium has not quite 

 the same appearance. 



5. S. cupola, Tenison Woods, sp. PI. VII., fig. 14. 



Lunnlites cupola, T. Woods, I.e., p. 8 ; L. petaloides (D'Orbigny) Waters, 

 Q.J.G.S., 1883, p. 442. 



Zoarium circular, subcorneal. Zooecia in irregular radiating series with deep 

 vibracular channels between, rounded and wide anteriorly and narrower behind ; 

 margins raised and crenulated ; lamina finely granular, rising from the depression 

 within the margins to the aperture ; aperture arched above and contracted towards 

 the straight lower edge ; vibracular cells rather small, with an opening contracted 

 in the middle by a process from each side, the lower edge minutely denticulate. 

 Dorsal surface concave, with irregular slightly prominent ridges separated by 

 distinct narrow sulci. 



S.P.; M.C; C.B. ; Bel.; Birregurra; L.B. 



Very closely allied to D'Orbigny's Lunulites petaloides with which Waters 

 considers it identical. D.Orbigny describes and figures the zooecia as distinct 

 behind, which they are not in our species. I, therefore, consider it advisable to 

 take the name given by Woods. 



It is readily distinguished by the regular arrangement of the zooecial series 

 and the characteristic vibracularia situated between them. 



Pareunia, Pourtales. 



Zoarium calcareous, erect, branching; stems and branches composed of 

 segments united by corneous joints. Zooecia arranged round an imaginary axis, 

 with elevated margins and depressed area which is more or less covered in with 

 membrane. Hincks. 



H 



