A MONOGRAPH OF THE TERTIARY POLYZOA OF VICTORIA. 65 



avicularium, with a pointed, frequently vibraculoid, mandible directed upwards and 

 outwards on one side of the zooecium. Ooecia large, granular. 



Var. spicata, McG., P.Z.V., 175. Zocecia finely granular or perforated ; a stout 

 conical process directed upwards from the front of the zoceciuni below the try pa 9 

 which it conceals. 



M.C. A common cosmopolitan living species. 



The only specimens I have seen are of the variety spicata. The zooecia are 

 granular, or probably from the granulations being worn off, perforated with small 

 pores. In many of the zooecia the peristome is raised and produced inwards on each 

 sides so as to be nearly personate. 



2. M. diadema, McG. 



Lepralia diadema, McGr., P.Z.V., 37 ; L. canaliculata, I.e. ; Microporella 

 diadema, McG., T.R.S.V., Nov., 1884 ; P.Z.V., 175 ; Hincks, A.M.N.H., March, 



1885; M. decorata, Waters, Q.J.G.S., 1882, p. 508; id., 1887, p. 54; id., 

 A.M.N.H., Sept., 1887. 



Zoarium encrusting. Zocecia broad, distinct, areolated round the margins ; 

 trypa round or lunate ; an avicularium on each side, with the long pointed mandible 

 directed upwards and outwards. Ooecia in recent specimens with a beaded rim. 



B. Living Australia and New Zealand. 



Waters considers this species identical with the JEscliara decorata of Reuss, a 

 determination which I consider at least doubtful. The only fossil specimen I had 

 was unfortunately mislaid before a drawing was made. For the varieties see 

 P.Z.V., 175. 



3. M. malusii, Andouin, sp. PL IX., fig. I. 



Lepralia malusii, Busk, B.M.C., Pt, II., 83 ; Crag. Pol. 53 ; McG., P.Z.V., 36 ; 

 Microporella malusii, Hincks, B.M.P., 211 ; Waters, Q.J.G.S., 1883, 437 ; id., 1887, 

 p. 54; Busk, C.P., 137; McG., P.Z.V., 175. 



Zoarium encrusting. Zooecia distinct, ovate or pyriform, convex ; trypa lunate, 

 from a third to half-way down the zooecium ; numerous stellate pores arranged in 

 one or more rows round the margin and beneath the lower lip of the thyrostome, 

 leaving a clear space above the trypa ; four or five oral spines. 



S.P. A cosmopolitan living species. 



4. M. rudis, n.sp. PI. IX. fig. 2. 



Zooecia large, obscurely hexagonal ; surface sparsely perforated and closely and 

 minutely punctate ; trypa semilunar, the convex edge above ; thyrostome slightly 



