A MONOGRAPH OF THE TEllTIARY POLYZOA OF VICTORIA. 13 



6. A. anmilns, Manzoni, sp. PI. VI., fig. 3. 



Memhranlpora amiulus, Manzoni, Bryoz. Foss. Ital., ki, cent., p. 7 ; Id., Bryoz. 

 di Castacaro, 12; Waters, Q.J.G.S., 1887, p. -17; M. dentata, Waters, Q.J.G.S., 

 1883, p. 2(53; .^31. gatelta, Busk, P.M.C., PL II., p. 02 ; /(/., Zool. Kerguelen 

 Isl., Phil. Tr. CLVIIL, 195. 



Zoarium encrnsting. Zowcia irregularly arranged, distinct, short and wide ; 

 margins raised, the npper part thickened and projecting forwards, Avith fonr large 

 spines situated two on each side ; area largely filled in by a depressed calcareous 

 lamina ; aperture large and nearly circular with a thickened annular rim ; a small 

 elliptical or pointed avicularium surmounting the zoojcia, and frequently one or t\\ o 

 at the base. 



M.C. ; B. ; M. Living Falkland and Kerguelen Islands. 



Waters (Q.J.G.S.), 1887, p. 17) describes the oarium as " widely open with a 

 raised line arching across the front, a short distance above the opening, enclosing a 

 narrow depressed area." 



7. A. cylindriforme, Waters, sp. PI. VI., fig. 2. 



Membr.anipora cylindriforme. Waters, Q.J.G.S., 1831, p. 323 ; id., L882, p. 263. 



Zoarium small, cylindrical. Zocecia separated longitudinally by a small tract 

 which may be considered an extension of the cell downwards ; area broad below, 

 nax'rowed above, triangular, with the angles rounded; lamina smooth or subgranular; 

 aperture large, subcircular ; four spines above, of Avhieh the lateral are consideral)ly 

 the larger ; an avicularium, Avith pointed mandible, directed upwards or occa- 

 sionally laterally, on a raised process at the apex of the zoreeium ; another 

 avicularium, with the mandible directed transversely, on an elevation below the 

 area. 



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



8. A. ocGidliitnin, Waters, sp. PI. V., fig. 15. 



Memhranipora occnUata, Waters, Q.J.G.S., 1887, p. 18. 



Zoarium encrusting. Zoceeia quadrate ; aperture large, occupying about half 

 the area, lower edge straight, arched above, sides straight or slightly contracted 

 about the middle, granular; with age the sides and lower parts of the zooicia 

 elevated by a calcareous overgroAvth, those of the contiguous zotecia coalescing and 

 becoming continuous so that the aperture appears to l)e deeply buried ; a small 

 rounded avicularium below or on one or both sides of the elevated portion. 



G-2 



