Zoology.'] NATURAL HISTORY OF VICTORIA. IPolyzoa. 



Plate 185, Fig. 5. 

 AMATHIA AUSTRALIS (Tenison- Woods). 



Description. — Zooecia arrang-ed in stmigbt unilateral clusters of 5-7 sub- 

 alternate pairs, of nearly uniform thickness, diminishing' in heig'ht from the proximal 

 to the distal; the terminal clusters having beyond the distal zocEcia a pair of large, 

 confervoid, and frequently branched processes; a similar process often replacing- a 

 branch at a bifurcation. 



References. — Serialaria Australis, Tenison- Woods., Proc. Roy. Soc. N. S. 

 Wales, 1877; Amathia Australis, T.-Woods, Tr. Roy. Soc. Vict., 1879. 



Port Phillip Heads. 



Occurs iu loose tufts several inches in height. The zooecia 

 usually diminish iu height fi'om the proximal to the distal, but 

 are occasionally nearly equal throughout the clusters. At a 

 bifurcation one branch is frequently represented by a confervoid 

 filament similar to those at the extremities of the terminal clusters. 



This species is probably the A. cornuta of Lamouroux. His 

 figure, however, represents the zooecia as increasing in height from 

 the proxuiial to the distal, and as there is, therefore, some doubt 

 about the determination, it is better to adopt Mr. Tenison- AVoods' 

 name. 



Explanation of Figures. 

 Plate 185. — Fig. 5, portion of specimen, natural size. Fig. 5a, part of same, magnified. 



The specimens and descriptions illustrated by this plate are 

 from Mr. MacGilhvray. 



Frederick McCoy. 



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