Zoology.] NATURAL HISTORY OF VICTORIA. [Polyzoa. 



Plate 126, Figs. 6-7. 



SCRUPOCELLARIA CERVICORNIS (Busk). 



Description. — Zoarium small, branches narrow. Zooecia 4-10 in an internode, 

 elongated, wide above, narrowed below; aperture elliptical, occupying rather more 

 than one-third of the front, margin slightly thickened; a somewhat reniform fornix, 

 with a rather narrow peduncle, covering about half of the aperture, and marked with 

 radiating canals obscurely arranged in two groups: a variable number of spines 

 round the upper part; usually one, simple or branched, at the upper and inner part, 

 two, jointed, at the outer, and one superiorly. Lateral avicularian processes large; 

 anterior avicularia small, situated considerably below the aperture and close to the 

 inner margin. Vibracular seta? very long, slender and smooth. Ocecia slightly 

 contracted below, perforated by round foramina. Radical fibres smooth. 



Reference. — Busk, Cat. Mar. Pol. Brit. Mus., pt. i., p. 24, pi. lxii. 



Port Phillip Heads. 



Occurs in small glassy tufts on other Polyzoa. Busk figures 

 and Hincks describes (Ann. and Mag. Nat. Hist., March 1883) the 

 lateral avicularia as very small, while in my specimens they are of 

 considerable size. 



Explanation of Figures. 

 Plate 126. — Fig. 6, specimen, natural size. Fig.. 6a, anterior view of a portion, magnified. 

 Fig. 66, dorsal view of the same. Fig. 7, small portion of another specimen, to show the per- 

 forated ooecium. 



Plate 126, Fig. 8. 



SCRUPOCELLARIA SCRUPEA (Busk). 



Description. — Zooecia 5-12 in an internode, broad; aperture occupying- nearly 

 half of the anterior surface, with a thickened margin ; a hammer-shaped scutum 

 covering- about half of the aperture, rounded below, and narrowed and slig-htly turned 

 forwards above ; a stout, occasionally bifurcate spine directed forwards at the base 

 of the peduncle of the scutum, and usually about 3 from the upper and outer part. 

 Lateral avicularian processes of moderate size or, occasionally, very large ; anterior 

 avicularia rare, small, on a somewhat columnar elevation, and with a very small 

 mandible. Vibracular setae short and slender ; usually two vibracular cells in the 

 angle of a bifurcation. Ocecia smooth, imperforate. Radical tubes smooth, ending 

 in rosette-like expanded extremities. 



Reference. — Busk, Brit. Mus. Cat. Mar. Polyzoa, pt. i., p. 24, pi. xxi., figs. 1, 2. 



Port Phillip Heads ; Portland, Mr. Maplestone. 



Forms small white tufts, half an inch or more in height. There 

 can, I think, be no doubt that this is identical with the common 

 European species, of which, however, the only specimens I have 

 are rather imperfect. 



Explanation of Figures. 

 Plate 126. — Fig. 8, specimen, natural size. Fig. 8a, view of anterior surface, magnified. 

 Fig. 86, another portion of the same, showing two ovicells. Fig. 8c, dorsal surface. 



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