General Ilisforf/ of the Mariiic PoJijzoa. 281 



a very small segment on each side, occupied by a deep 

 bluntly-pointed sinus ; peristome not elevated, unarmed ; on 

 each "side of the orifice a tall, stout, tower-like process, 

 bearing either at the back (usually) or on one side a large erect 

 avlcularium^ extending from the base to the top of it ; man- 

 dible broad and triangular below, slender and much produced 

 above, directed upward. Ooecium gigantic, suborbicuUvr, 

 extending almost to the orifice of the cell above, the surface 

 sloping down gradually on all sides from the elevated centre 

 to the base (in the centre commonly a very prominent smooth 

 umbo), thickly punctured and nodulated, the punctures gene- 

 rally concealed more or less by the smooth superficial invest- 

 ment ; the two aviculiferous processes projecting one on eacli 

 side in front of the ovicell. 



Zoariam of a rather light yellowish-brown colour, incrusting 

 a seaweed, and sending oft' free bilaminatc expansions, short 

 and broad, at intervals, which have a tendency to arrange 

 themselves in whorls. 



Log. Port Phillip Heads {J. B. Wilson). 

 The tower-like processes constitute the striking feature of 

 this species ; they roughen the surface and give a scabrous 

 ap})earance to the crust. Occasionally the avicularium is 

 absent. The lower portion of the processes is invested by the 

 superficial covering, which spreads over a great part of the 

 zoarium ; but it does not extend to the smooth and polished 

 apex. 



Schizojjorella msigm's, MacGillivray. 



Schizoporella insignis, MacGillivray, Proc. Roy. Soc. Victoria, 1882. 



Under this name MacGillivray has described a species 

 which he had obtained off Port Phillip Heads, and which also 

 occurs amongst Mr. Wilson's dredgings. It seems to me to 

 be identical with Schizoporella conservata^ Waters, a Tertiary 

 fossil from South-west Victoria. I have recorded the occur- 

 rence of this form in Australia as a recent species (' Annals ' 

 for August 1882). In any case the name insiynis could not 

 be retained, as it had already been conferred on an African 

 species (" Contributions " &c. ' Annals ' for August 1881). 



Family Escharidae (part.), Smitt. 

 Lepealia, Johnston (part.). 

 Lejjralia hifrons, n. sp. (PI. VIII. fig. 3.) 

 Zooecia elongate, subrectangular, quincuncially arranged, 



