Zoology.'] NATURAL HISTORY OF VICTORIA. \Polyzoa. 



which induced me to describe these forms as distinct species.. I 

 have since, however, found specimens in which both co-exist, as is 

 shown in that figured. 



Explanation of Figures. 

 Plate 127. — Fig. 5, portion of a specimen, showing the serrated denticles, two ooecia, and 

 an avicularium. Fig. 5a, other zooecia from the same, two of which are unarmed, two with 

 uncinate spines, and the others with the serrated denticles, which are simpler and narrower 

 than in the other figure ; two avicularia are also shown. 



Plate 127, Fig. 6. 

 MEMBRANIPORA CILIATA (McG.). 



As the figure given on Plate 25 is not quite correct, I give 

 another. It is doubtful whether this species ought to be con- 

 sidered as a Membranipora with the cell produced below the area-, 

 or referred to Amphiblestrum. In some zooecia there is a decided, 

 though very narrow rim, while in others it is absent or only faintly 

 indicated, as in the figure. The spines are sometimes thinner 

 than in the figured specimen, but never so slender as shown in 

 Plate 25. 



In addition to the localities previously mentioned, Mr. Maplestone 

 has found it at Portland. 



Plate 127, Fig. 7. 

 AMPHIBLESTRUM ALBISPINUM (McG.). 



[Genus AMPHIBLESTRUM (Gray). (Suh-kingd. Mollusca. Class. Polyzoa. Order 

 Infundibulata. Sub-order Cheilostomata. Fam. Membraniporida?.) 



Gen. Char. — Zoariuin encrusting. Zooecia with the aperture occupying the whole front, or 

 with part of the zocecium produced below ; aperture partly filled in by an additional membranous 

 or usually calcareous lamina.] 



Description. — Zooecia elongated, narrowed and extended downwards beyond 

 the area; aperture occupying- about half of the area, the lower margin slightly 

 thickened; on each side a series of 3-5 enormous, pod-like, articulated spines, and 

 generally 2 or 3 smaller from the upper margin. 



Reference. — P. H. MacGillivray, Trans. Roy. Soc. Vict., Dec. 1881. 



QueensclifF ; Portland, Mr. Maplestone. 



[ 106 ] 



