Zoology.] NATURAL HISTORY OF VICTORIA. {Polyzoa. 



Plate 89, Fig. 5. 

 CATENICELLA UTRICULUS (P. McG.). 



Description. — Cells conti'acted above and lielow. Mouth arclied abovp, lower 

 lip with a wide shallow sinus. Front smooth, or very finely ])a])illose. A very 

 narrow, entirely niarjiinal vitta the whole leno-th of" the cell on each side. Lateral 

 processes triang'ulur, extending- forwards and outwards from eacli side of the mouth, 

 with a small avicularium on the outer edge, and frequently a small pyriform mark 

 (probably avicularian) at the base in front. Back of cell very finely sulcata. 



Warniambool, Mr. 11. Watts. 



I have only seen two niinnte fragments of this species, which 

 were sent in a slide to the Musenm. The cells are ovate or 

 pyriform, contracted above and below. The avicnlarian processes 

 are triangular and ear-like, limited in extent to the depth of the 

 mouth, from the sides of which they directly rise ; the superior 

 margins above the mouth are closely contiguous, although not 

 quite continuous. On the edge of the lateral process is usually a 

 small avicularium, and at the junction of the lower angle with the 

 cell is frequently a triangular mark, Avhicli may possibly indicate 

 another avicularium. 



Explanation of Figures. 



Plate 89. — Fig. 5, natural size. Fig. 5a, front of cells, magnified ; the very shallow sinus 

 is not shown in the lower lip. Fig. 56, back of cells, magnified. 



The specimens and descriptions of the above Catenicellce are 

 contributed by Mr. MacGillivray. 



Frederick McCoy. 



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