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



and outwards, and the inner alternating- with these, arching- closely over the front 

 of the cell and meeting- in the mesial line. Dorsal surface smooth, g-lassy ; in many, 

 especially the marginal cells, a round mark on each side towards the base, probably 

 indicating- the attachment of a radical fibre. No avicularia. 



Portland, Mr. Maplestone ; Port Phillip Heads, Mr. J. Brace- 

 bridge Wilson. 



This species is readily distinguished from the other Australian 

 forms by the closeness of the cells, the six large spines at the 

 anterior extremity, and the absence of avicularia. The peculiar 

 arrangement of the marginal spines, directed alternately outwards 

 and inwards, is not constant, but when present is very striking. 

 It is closely allied to the form described, from Algiers, by 

 Mr. Hincks (Ann. and Mag. Nat. Hist., Aug., 1881) as Diachoris 

 hirtissima, var. robusta, from which it differs in having two instead 

 of three superior spines and in the total absence of avicularia. 



Explanation op Figure. 

 Plate 195. — Fig. 4, single zooecium, magnified. 



Plate 195, Fig. 5. 

 BEANIA WILSONI (McG.). 



DESCRiPTiON.-^Zooecia connected with six others by long- corneous tubes, sub- 

 erect; two or three short, straight, slender spine.s, and one or two sharp, incurved 

 spines on the margin _ on each side. Posterior surface smooth. A large capitate 

 avicularium articulated at the upper part of the zooecium on each side. 



Reference. — P. H. MacGillivray, Tran. Roy. Soc. Vict., Nov., 1884, 



Port Phillip Heads, Mr. J. Bracebridge Wilson. 



Evidently closely allied to the South African Diachoris distans 

 of Hincks, fi'om which it differs in having avicularia on both sides, 

 and in the absence of the round marks of the radical tubes 

 posteriorly. 



Explanation of Figukes. 



Plate 195. — Fig. 5, group of zooecia, anterior view, magnified. Fig. 5a, posterior view of 

 single zooecium'. 



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