Zoology.] NATURAL HISTORY OF VICTORIA. [Polyzoa. 



Plate 89, Fig. 4. 



CATENICELLA PULCHELLA (Maplestone). 



Description. — Cells elliptical, or, including* the wide lateral processes, vase- 

 shaped. Mouth arched above ; lower lip nearly straight, with a deep rounded sinus. 

 A close series of about 12 (5 or 6 on each side) rounded fenestrse arranged along the 

 margin of the cell. The very wide lateral processes extending the whole length of 

 the cell, divided into two portions by a partition extending- outwards and downwards 

 from the top of the cell ; the upper part triangular, with the point directed upwards 

 and outwards. In the outer edge, immediately below the partition, is a small 

 avicularian cup. Back of cell minutely sulcate. Ovicell rounded, flat, situated on 

 the front of a cell sessile on one of a geminate pair. 



Reference. — Maplestone, Journ. Mic. Soc. Vict./ May 1880 = C. concinna, 

 P. H. MacGillivray, Tr. Roy. Soc. Vict. 1880. 



Queenscliff, Mr. Maplestone ; Port Phillip Heads, Mr. J. B. 

 Wilson. 



The only specimens I have examined are mounted in balsam by 

 the carbolic acid process, which has made them excessively trans- 

 parent. Mr. Maplestone describes the cells as "with a row of 

 small bosses or beads round the sides and lower portion of the 

 cell," and the ovicell as "galeriform, ornamented with bosses and 

 surmounted by two avicularia, geminate, not terminal." In my 

 specimens the markings are certainly fenestrse, but in others they 

 might be projections either from, in the young state, being covered 

 by a bulging membrane, or being obscured by a calcareous over- 

 growth. In the description of the ovicell, Mr. Maplestone has 

 evidently not distinguished between the ovicell itself and the cell 

 to the lower part of which it is adherent. 



Explanation op Figures. 



Plate 89. — Fig. 4, natural size. Fig. 4a, portion, magnified to show the front of the cells. 

 Fig. 46, back of cells, magnified. Fig. 4c, front of another portion, magnified, to show the 

 ovicell. 



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