Zoology.-] NATURAL HISTORY OF VICTORIA. \_Polyzoa. 



There has been great confusion about the European species 

 C. fistulosa and C. sinuosa, and, judging from the descriptions and 

 figures, I thought this a distinct species, and had marked it C. aus- 

 tralis. C. simiosa is distinguished by the large, frequently oblique 

 avicularium, with a triangular, acutely pointed mandiljle directed 

 downwards. According to Busk (Crag Polyzoa, p. 23) the man- 

 dible in C. fistulosa is small, semicircular, blunt ; and it is so 

 figured in the British Museum Catalogue, where the two species 

 are united. Smitt describes the mandible as semicircular, and 

 figures it as very small. Hincks, however, in his recently pubUshed 

 British Marine Polyzoa, describes the mandible as being very 

 shallow and arcuate, and one of his figures (pi. xiii., fig. 3) differs 

 from our form only in being rather narrower. The Australian 

 specimens seem to be stouter, with a larger number of series in 

 the cylinders, and might be named var. australis. 



There is no doubt that the generic name of Cellaria, as defined 

 by Lamouroux, ought to be retained for the present genus, and it 

 is equally proper that the specific name fistulosa, originally given 

 by Linnajus, although in reality incorrect, should be adopted. 



Explanation of Figures. 



Plate 49.— Fig. 1, specimen, natural size. Fig. la, portion of an internode, magnified. 

 Fig 16 2 cells, more highly magnified, showing the ovarian pores. Fig. \c, group of cells from 

 another portion of the same specimen. Fig. Id, single cell, showing a large, oval, ovarian pore. 

 Fig le 2 cells, with an avicularium between them ; in each cell a small rounded ovarian pore 

 is shown situated towards one side of the upper part. (The avicularium is not properly shaded.) 



Plate 49, Fig. 2. 



CELLARIA HIRSUTA (P. MacGil.). 



Description. — Cells in a series contig-uous ; surface p;ranular ; mouth central, 

 lower lip archRii uyiwards, usually with a minute denticle at either side internally ; 

 a long corneous tubular process from the base of the cell. Avicularium replacing a 

 cell ; mandible very large, semicircular. Ovicell opening by a lunate pore. 



Reference.—" 5«/M;oma?-ia id., P. H. MacGillivraj', Trans. Roy. See. Vict., 1868. 



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