A MONOGRAPH OF THE TEKTIARY POLYZOA OF VICTORIA. 99 



front, frequently in a neck-like manner, and supportino; a small mncro ; upper lip 

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

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

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



opening upwards and forwards. Ocecium rounded, usually contracted below, raised,. ^ '^ ''''''';;) 

 in the centre and surrounded by a row of deep converging arcohe. f^^ \'\- 



S.P. ; M.C. ; E. ; M. Living. Australia and New Zealand. <Uc«j3V.'-> 



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

 Zoarium crustaceous. Zooecia 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. OcBcium 

 small, rounded. 



S.P. ; C.B. 



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



Zoarium bilaminatc. Zooecia indistinct, entirely occupied by close, irregidarly- 

 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, Avhieh seems to be part of a rather narrow rounded 

 branch. 



4. 31. teres, Hincks. PI. XIII., fig. 7. 

 Mucronella te)-es, Hincks, A.M.N.H., Aug., 1881 ; 31. Icecls, McG., P.Z.V., IIG. 



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

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

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

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



M.C. Living. Australia. 



I now believe that 31. teres and 3£. Itevis arc the same species. 



5. .^ If. oultu); Hincks. PI. XIII., fig. 1. 

 3Iucronella viMiu; Hincks, A.M.N.H., 5, X., sep. U8. McG., P.Z.V., 116. 

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



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