A MONOGRAPH OF THE TERTIAKY POLTZOA OF VICTORIA. 49 



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

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

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

 vibraeular pit large encroaching on the zooeciura in front. Dorsal surface with 

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

 nodular or granular with irregular or round i^orcs. 



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



At once distinguished by the well marked characteristic vibraculai'ia. I am 

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

 the same appearance. 



5. S. cupola, T(Miison Woods, sp. PI. VII., fig. Ik 



Lunulites cirpolo, T. Woods, I.e., p. 8 ; L. pefaloidos (D'Orbigny) Waters, 

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



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

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

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

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

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

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

 Dorsfll 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 whicli Waters 

 considers it identical. D.Orbigny describes and figures the zoojcia 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 zoojcial series 

 and the characteristic vibracularia situated Ijctween them. 



Earcimia, Pourtcdes. 



Zoarium calcareous, erect, branching ; stems and l)ranches composed of 

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

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

 membrane. Iliucks. 



H 



