Zoology.] NATURAL HISTORY OF VICTORIA. \Polyzoa. 



Plate 90, Fig. 1. 



CATENICELLA FUSCA (P. McG.). 



Description. — Cells elongated, narrow, bulging posteriorly. Mouth arched 

 above, lower lip slightly hollowed. Surface smooth or slightly papillose. Vittae 

 entirely lateral, extending the whole length of the cell. Lateral processes small, 

 stout, conical, directed forwards, with a minute avicularium at the base of the 

 external margin. Ovicell cemented to the front of the cell above, which is sessile 

 on the ovicelligerous cell, front flat or slightly hollowed, with a beaded margin. 



Queenscliff. 



Forms large, handsome, greyish-brown tufts, the large stalks 

 chestnut-red. It is closely allied to C. Buskii. 



Explanation of Figures. 



Plate 90.— Fig, 1, natural size. Fig. la, front of branch, magnified. Fig. lb, back of 

 small portion, magnified. Fig. lc, profile view, to show the bulging of the back of the cells and 

 the flat front of the ovicell. 



Plate 90, Fig. 2. 



CATENICELLA UMBONATA (Busk). 



Description. — Cells small, wide above, narrowed below, bulging forwards. 

 Mouth arched above, lower lip hollowed. Surface minutely papillose. Vittae 

 anterior, extending* from the base of the cell to the lower lip. Lateral processes 

 with an avicularium in a deep cup beneath the upper angle. Posterior surface 

 smooth, with a prominent umbo in the middle. Ovicell cemented to the cell above, 

 which is sessile on the ovicelligerous cell, with a broad vertical ridge and a raised 

 smooth or beaded margin. 



Reference. — Busk, Brit. Mus. Cat. Mar. Polyzoa, Pt. i., p. 11, pi. x., f. 4, 5. 



Port Phillip Heads. 



Forms small glassy tufts on other zoophytes. 



Explanation of Figures. 



Plate 90. — Fig. 2, natural size. Fig. 2a, portion of branch to show the front, magnified. 

 Fig. 2b, back of geminate and ordinary cell, magnified. Fig. 2c, cell in profile, to show the pro- 

 jection of posterior umbo. 



Dec. ix. [ 33 ] E 



