38 A MONOGRAni OF THIi TERTIARY POLYZOA OF VICTORIA. 



12. JU. coucinua, ii sp. PI. V., fig. 4. 



Zoariimi l)il;iniinatc. Zoa-cia irregular in shape, rounded above, sejiarated by 

 thick, raised, strongly-granulated margins, surmounted l)y a narrow smooth raised 

 line and descending abrujjtly to the fiat granular lamina ; a})erture occupying about 

 one-fifth of the area, extending laterally to the margins, flie lower edge straight or 

 with a slight sinus at each angle ; avicularian cells intercalated among the zoa-cia, 

 granular, the triangular mandible directed upwards. 



s.r. 



Distinguished by the ;>l)ruptness with which the margins descend to the broad, 

 nearly fiat, granular lamina, and the width of the aperture which extends quite to 

 the margins. 



13. 31. delicatitla, Eusk. PL V., fig. 5. 



Bijlnsh'ft deUcatiila, Busk, Crag Polyzoa, p. 72; McG., P.Z.V., 57; Mem- 

 bronipora dellculala, Ilincks, A. M.N. II., July, 1880; J/. 6«<;ar^/(!', Waters, Q.J. G.S., 

 1885, p. 286. 



Zoarium bilaminate. Zoceeia quadrate but bulging on the sides; margins 

 granular; a granular lamina filling part oi" the area below; aperture rounded or 

 elliptical, occupying three-fourths of the area. 



13. Living. Australia. 



Var. acicidala, McG. PI. V., fig. 9. 



Biflustra acicidcda, McG., T.E.S.V., Nov., 1890. 



IJavitig a low of very minute acicular denticles projecting inwards from the 

 edge of tlic apcrl lire. 



M.C. Livin"'. Port Jackson. 



'a* 



lli. 31. mcarlii. PI. V., tigs. 0, 7. 



Bijlmlra savartll, McG., T.ll.S.V., Nov., 1890; f 3Iembranipora trij'olliim, 

 var. minor, Hincks, A.M.N. 11., July, 1880. 



Zoarium encrusting. Zoceeia ovate or elliptical ; area partly filled in by a 

 sloping, finely-granular narrow lamina ; aperture elliptical, occupying the greater 

 part of the area ; zotecia extending slightly l)elow the area ; small avicularia, with 

 the mandibles directed upwards, genendly placed on each side of the base of a 

 zocecium. 



.M.C Living. Australia. 



