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



the centre, is occupied by small round perforations, arranged in 

 irregular lines and extending above the mouth. Occasionally there 

 is no clear central space. There is sometimes an elevated portion, 

 or umbo, below the mouth, both forms being found in the same 

 specimen. In a specimen contributed to the Museum by Mr. Watts 

 from Warrnambool, the walls are much thickened and porcellaneous, 

 and the whole surface is occupied by large openings, except in a few 

 cells, where there is a small elevated smooth space below the mouth. 



Explanation of Figures. 



Plate 35. — Fig. 2, specimen, natural size. Fig 2a, portion, magnified. Fig. 2b, single cell, 

 more highly magnified. Fig. 2c, cell, with ovicell. Fig. 2d, single cell and outlines of two others 

 of the porcellaneous form. 



Plate 35, Fig. 3. 

 LEPRALIA DIAPHANA (P. McG.). 



Description. — Cells distinct, smooth and diaphanous ; mouth arched above, 

 thickened and produced forwards below, with several (sometimes 5 or 6) short spines 

 and usually a very long-, jointed one articulated at one side. Ovicell small, globular, 

 smooth. 



Queenscliff; Warrnambool, Mr. Watts. 



This very peculiar species can be confounded with no other that 

 I have seen. There is a variable number of short spines on the 

 margin of the upper lip, and at one side an excessively long spine, 

 several times the length of the cell and consisting of numerous 

 joints. There is occasionally one of these long spines on each side 

 of the mouth. 



Explanation of Figures. 



Plate 35. — Fig. 3, specimen, natural size. Fig. 3a, portion, magnified. Fig. 36, small 

 portion, more highly magnified. 



Plate 35, Fig. 4. 

 LEPRALIA MARSUPIUM (P. McG.). 



Description. — Cells small, distinct, arranged in longitudinal lines ; upper part, 

 immediately below the lip, forming" a large, rounded, pouch-like projection - } mouth 

 with several small spines on the upper margin. Ovicell small, globular. 



Reference. — P. H. MacGillivray, Trans. Roy. Soc. Vict., 1868. 



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