68 A MONOGRAl'II OF THE TERTIARY TOLYZOA OF VICTORIA. 



S.P. ; -M.C. Living. Australia. 



Vur. liitenliyitala, fig. 6. Zooecia irregular in shape, sejiaratcvl by sinuous 

 divisions, the lohes or ]irocesses from contiguous zod'cia frequently interdigitating. 



S.P. 



2. A. cellulosa, McG. PL IX., fig. 4. 



Blclyopora cellulosa, McG., P.Z.V., 17 ; Adeona cellulosa, Kirclienpauer, Ucber 

 die Adeona, 10 ; McG., C.V. ; Microporella cellulosa, form Adeona, Waters, 

 Q.J.G.S., 1883, p. 437. 



Zoarium expanded, bilaminate, fenestrate, proliferous and cavernous (recent 

 specimens) ; edges of the fenestra" ^vith pitted or granular nodules. A large 

 avicularium in front, with the mandible long, directed upwards and outwards, and 

 reaching half-way up the side of the thyrostome. 



S.]'. Living. Australia. 



One or two imperfect fragments seem referable to this species. 



A. grisea and eellnlosa are very closely allied. The only difference in the zocteia 

 is that in tlie former th(> avicularian mandibles are shorter and do not extend up the 

 side of the thyrostome as they do in the latter. The fossil specimens are only small 

 fragments, and do not shew the structure of the zoarium. This, hoAvever, in recent 

 specimens is so different in the two forms that in my opinion they must be considered 

 to be specifically distinct. In A. grisea the zoarium is broad, flabelliforin and flat, 

 not convoluted, and in all the specimens I have seen consists of a single plate. 

 Kirchen})auer, however, says that it is sometimes proliferous. In A. cellulosa it is 

 mucli larger, jjrolilVrous, and forming large cavernous cells. The colour, which in 

 this genus is a character of some value, is dark grey or nearly black in the former, 

 while in the latter it is In-own, of a rather light tint. 



**Zoarium attached by a rigid base. 



(Adeoiiellops/x, ]\1 cG.) 



3. yl. ohliqua, n.sp. PI. IX., figs. 7-11. 



Microporella violacea, xav.Jissa, Waters, Q.J.G.S., 1881, p. 829. 



Zoarium erect, bilaminate, divided into flat lobes. Zooecia arranged in oblique 

 series directed from the centre outwards on either side, ovate ; surface round the 

 margins punctured ; a depression in the centre, Avith a small pore (try])a), Avhich is 

 seen posteriorly as a linear denticulate fissure ; an elevation on oiu' or occasionally 

 on both sides (one then not so conspicuous) below the thyrostome ; thyrostome 



