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



Plate 24, Fig. 12. 



CATENICELLA BUSKII (Wyv. Thomson). 



Description. — Cells very much elongated, narrow. Vittae very narrow and 

 extending the whole length of the cells. Ovicell g-aleate, superior, projecting on 

 the surface of the cell above, with which it is incorporated, with a beaded border. 



Reference. — Wyviile Thomson, Dublin Natural History Review, April 1858. 



A small species growing on other polyzoa ; rare. Keadily dis- 

 tinguished from the other small species by the long, entirely lateral 

 vittae, and the adnate beaded ovicell. 



Explanation op Figures. 



Plate 24. — Fig. 12, natural size. Fig. 12a, front view of a branchlet of cells with ovicell, 

 and showing the side view also of some cells, magnified. Fig. 126, another series of cells, front 

 view, magnified. Fig. 12c, back view of cells, magnified. 



Plate 24, Fig. 13. 

 CATENICELLA HANNAFORDI (P. MacGil.). 



Description. — Cells wide, ovoid or subglobular. Lateral processes large, 

 gaping, directed forwards, usually equal on both sides. Vittse narrow, entirely 

 lateral, extending the whole length of the cell. Anterior surface smooth, or very 

 finely papillose; posterior surface faintly sulcate. 



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



Lady Bay, Portland, adhering to algae ; Mr. Hannaford. 



This species may be distinguished by the large gaping avicu- 

 larian processes, directed a good deal forwards, and almost sur- 

 rounding the mouth and the narrow entirely lateral vittae. 



Its closest ally is C. ringens, which I have not seen. 



Explanation of Figures. 



Plate 24. — Fig. 13, natural size. Fig. 13a, front view of a branchlet, showing single and 

 double cells, magnified. Fig. 136, back view of ditto, magnified. 



[ 24] 



