Zoology.-] NATUEAL HISTORY OF VICTORIA. \_Polyzoa. 



Plate 24, Fig. 4. 



CATENICELLA HASTATA (Busk). 



Description. — Cells ovate. Fenestrse surrounding" a scutiform area, and with 

 intermediate fissures radiating towards the median line. Lateral processes very- 

 wide, the upper portion with several small perforations. Back minutely sulcate. 



Reference. — Busk, Voy. Ratt., i., 355 ; Cat. Mar. Pol. Brit. Mus., t. 2, f. 3, 4. 



QueensclifF, Western Port, Cape Otway, and other localities; 

 frequent. 



Forms thick brownish-white tufts, 1 to 3 inches high. It is 

 readily distinguished by the peculiar scutiform arrangement of the 

 fenestrse and intermediate fissures, and by the perforated superior 

 lateral processes. 



Explanation op Figures. 



Plate 24. — Fig. 4, natural size. Fig. 4a, front view of a branchlet, showing single and 

 double cells with ovicell also, magnified. Fig. 4c, back views of ovicell with ordinary cells also, 

 magnified. Fig. 46, drawn by mistake, back of cells with adherent extraneous matter. 



Plate 24, Fig. 5. 

 CATENICELLA EUFA (P. MacGil.). 



Description. — Cells vase-formed. Front with numerous round fenestra, the 

 circumferential being* the largest. Mouth with a notch in the lower lip. Lateral 

 processes small and pointed. On the back of the cell an elevated band runs up the 

 middle, sending a narrow branch horizontally to each lateral process, and a small 

 band extends up each side. Ovicells larg'e, cribriform, surmounted by two avicularia. 



Reference. — P. H. MacGillivray, Trans. Royal Soc. Vict., 1868. 



Common, forming handsome reddish-brown tufts, 4 or 5 inches 

 high. 



This and the next species, although presenting many points of 

 resemblance, are easily distinguished. The cells in both are of 

 nearly the same size and form, and are cribriform in front. In 



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