A MONOGRAPH OP THE TERTIARY POLYZOA OP VICTORIA. 99 



front, frequently in a neck-like manner, and supporting a small mucro ; upper lip 

 depressed, with four straight spines (seldom visible in the fossils) ; an avicularium 

 directed outwards on one or both sides of the projecting peristome on a raised 

 process, the base of which has three or four pores, the large spatulate avicularium 

 opening upwards and forwards. Ooecium rounded, usually contracted below, raised 

 in the centre and surrounded by a row of deep converging areola?. 



S.P. ; M.O. ; B. ; M. Living. Australia and New Zealand. 



2. M. lata, n.sp. PI. XIII., fig. 3. 



Zoarium crustaceous. Zocecia broadly ovate, moderately convex, separated by 

 narrow raised lines or grooves, obscurely granular, with a few small round pores 

 close to the margins ; thyrostome arched above, slightly contracted opposite the 

 angles of the mucro ; mucro large, broad, straight and expanded above, the angles 

 being produced laterally ; four spines articulated above ; occasionally a large 

 spatulate avicularium directed upwards by the side of the thyrostome. Ooecium 

 small, rounded. 



S.P. ; C.B. 



3. M. spongiosa, n.sp. PI. XIII., fig. 8. 



Zoarium bilaminate. Zocecia indistinct, entirely occupied by close, irregularly- 

 shaped pores, giving the whole a cancellated honeycombed appearance ; thyrostome 

 cresentic with rounded angles, the lower lip projecting upwards as a wide shallow 



mucro. 



M. 



A single small fragment, which seems to be part of a rather narrow rounded 

 branch. 



4. M. teres, Hincks. PL XIII., fig. 7. 



Mueronella teres, Hincks, A.M.N.H., Aug., 1881 ; M. Icevls, McG., P.Z.V., 116. 



Zoarium encrusting. Zocecia distinct, ovate, convex, smooth, a row of small 

 areolations round the margins ; thyrostome arched above, lower lip with a small 

 acute mucro pointing upwards, six spines on the upper edge. Ocecia small, round, 

 smooth, two or three spines on each side in front. 



M.C. Living. Australia. 



I now believe that M. teres and M. Iceois are the same species. 



5. ? M. mdtur, Hincks. PL XIII., fig. 1. 

 Mueronella vultur, Hincks, A.M.N. H., 5, X., sep. 98. McG., P.Z.V., 116. 

 I have a small fragment from Moorabool which I refer very doubtfully to this 



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