Zoology.-] NATUEAL HISTORY OF VICTORIA. [Polyzoa. 



Queenscliff ; Kings Island, Mr. McGowan. 



This is readily distinguished from the other species by the pro- 

 jecting outer angle of the marginal cells. The presence of a small 

 avicularium at the base of most of the cells is also very charac- 

 teristic. Some of the cells are unarmed, and others have a small 

 short spine at each upper angle. The ovicells are prominent, round 

 above, smooth. Each ovicelligerous cell has a long hollow process 

 on each side, curved inwards and upwards, which, with the avicu- 

 larium on the cell above, give a very peculiar appearance. 



Explanation of Figures. 



Plate 45. — Fig. 3, specimen, natural size. Fig. 3a, front, magnified, to show projecting 

 upper angles of marginal cells and avicularia at base of other cells. Fig. 36, cells from same 

 specimen, showing small spines at upper angles. Fig. 3c, back of some cells. Fig. 3d, ovicells, 

 showing also the long curved processes of the ovicelligerous cells and the avicularia at the base 

 of the cells above. (The mandible not satisfactorily shown.) 



Plate 45, Fig. 4. 



CARBASEA INDIVISA (Busk). 



Description. — Cells broad, oblong" or obscurely hexagonal, entirely open in 

 front, minutely granular behind. Polyzoary undivided, expanding abovp, frequently 

 involute, and with the edges united so as to form a more or less perfect cup. 



Reference. — Busk, Cat. Mar. Pol. Brit. Mus., p. 53, t. lviii., 3 and 4 ; 

 Carbasea cyathiformis, P. MacGillivray, Trans. Phil. Instit. Vict., 1859. 



Queenscliff ; Warrnambool, Mr. Watts ; Cape Otway, Mr. J. 

 Payter ; Portland, Mr. Maplestone. 



This species differs from the other Carbasece in the polyzoary 

 being undivided. In almost all the specimens I have seen, the 

 lateral margins are more or less involute and united inferiorly. 

 It is frequently cup -shaped (var. cyathiformis), of which a very 

 beautiful specimen is figured. 



Explanation op Figures. 



Plate 45. — Fig 4, specimen, natural size. Fig. 4a, var. cyathiformis, natural size. Fig. 46, 

 front of cells, magnified. Fig. 4c, hack of cells, magnified. 



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