42 A MONOGRAPH OF THE TERTIARY POLYZOA OF VICTORIA. 



Zoarium in narrow, Hat, bilaniinato l)i'anclios. Zou'cia quincuncial, separated 

 by raised niai'i;ins, elongated, liexai;'onal ; aperf uvo occupying about half the area, 

 not (piitc rcacliing' the margins of tlio zoa'ciuin. with a slightly thickened and raised 

 rim ; lamina eaieareoiis, linely granular. 



M.C.; B.ll.; W.P. (W.) 



4. A. coriense, n.sp. PI. VI., fig. 1. 



Zoarium imilaininate. Zcxucia large, regulai-ly arranged alternately in longi- 

 tudinal series, hexagonal; margins raised, linely granular; aperture occupying 

 about hall' llie area, trifoliate; lamina minutely granular, sloping. Avicularia very 

 lai-ge, situated between the zoo'cia, lower part nn(dy granular, with a longitudinal 

 narrow oj)ening, mandibular portion very long, curved and scimitar-shaped, being 

 ojjliquely truncated at the extremity. Ocvcia prominent, rounded, finely granular, 

 thickened at (he inlerior edge, especially in the middle. Zoa?eia ])Osteriorly distinct, 

 enlarged above, narrowed below, \\\i\\ a large circular mark (probal)ly indicating 

 the attachment of a radical fibre) in Ww centre of each. 



C.B. 



Allied to A. Jleminyii and A. trifolinm. The only avicularium present in tlie 

 specimen is that figured. Tn one or two only of the zocecia, all of wliieli are 

 surmounted by ocecia, there are indications of a spine at an upper angle. 



5. A. prrnnm/tiim, Ilincks, sp. PI. V., fig. 19. 



3Iembra)iii)ora permunita, Ilincks, A.M.N.H., 1881 ; Amphihlestrnm, per- 

 mnnitiim, :\rcG., P.Z.A^, 100; M. michaiKliana, Waters, Q.J.G.S., Aug., 1885, 

 p. 289. 



Zoarium encrusting. Zorccia elongated, Avider at the middle; margin raised, 

 granular; a finely granular lamina sloping anteriorly to the aperture, whicli 

 occupies about a third of the area and has a sti-aight lower border ; avicularia at tlie 

 base of t'tborted zomcia, Avith a falciform mandible directed upwards and to one side. 

 Ooecia small, prominent, rounded, a semicirculni- or triangular space in front marked 

 off by a slightly raised band, the ujjper angle of which frequently pi-qjects forward 

 as a point. 



M.C. Living. Australia. 



Waters refers this species to D'Orbigny's Cellcpora michandiitiia, a determina- 

 tion which seems to me at least doul)t liil. ;ind T, thcrcfoiv. rdain tlic name by 

 whicli the recent form is known. 



