Zoology.'] NATURAL HISTORY OF VICTORIA. [_Polyzoa. 



Plate 176, Fig. 4. 

 LICHENOPORA BULL ATA (McG.). 



Description. — Zoarium encrusting-, thick, irregular. Zooecia irregular in shape 

 and size, prismatic, with rounded angles ; walls thick, with numerous internal, 

 minute, sharp spines. The zooecia at the edges of the ooecia with an elongated 

 peristome on one side, spout-like or divided, directed towards the elevation. Ooecia 

 scattered over the zoarium, large, buUate, minutely punctate or perforated, the 

 zooecia underneath closed by a minutely punctate membrane or plate. 



Reference. — P. H. MacGillivray, Tr. Roy. Soc. Vict., July 1886. 



Port Phillip Heads, Mr. J. B. Wilson ; Warruambool, Mr. 

 Watts ; Portland, Mr. Maplestone. 



In these two species the cancelli are very obscure or absent ; 

 there are smaller apertures of which it is difficult to say whether 

 they are really cancelli or aborted zooecia. This subject, as well 

 as the relations and differences between the Tubuliporidte and 

 Discoporellidie, will be recurred to when describing the other 

 species. 



The generic name Lichenopora, having priority over that of 

 Discoporella, ought to be retained. 



EXTLANATION OF FlGtTRES. 



Plate 176. — Fig. 4, specimen, natural size. Fig. 4a, portion magnified, showing an ooecium 

 which has been opened to expose the orifices of the subjacent zooecia. Fig. 46 and 4c, zooecia 

 from other parts of the same. 



The specimens figured on this plate have been presented to 

 the National Museum, and the descriptions to this work, by Mr. 

 MacGillivray. 



Frkderick McCoy. 



[281 ] 



