130 Proceedings of the Royal Society of Victoria. 



height, one measuring five inches. It is only attached by the 

 bases of the main stems by radical tubes, the branches being quite 

 free and not intertwining or climbing over other objects. The 

 zooecial clusters are markedly oblique and extend over nearly the 

 whole length of the internodes, never being restricted to so small 

 a portion as the half. The large size of the zooecial clusters, and 

 its more regular growth give it a much stouter appearance. In 

 both species the zooecia are more separated than in the othei^s. 



8. A. PINXATA, Kirkpatrick. 

 (Plate C, Fig. 1.) 



Aviathia pinnata, Kirkpatrick, Ann. and Mag. ^at. Hist., 

 July, 1888. 



Zoarium pinnately l)ranched. Zocecia arranged in biserial 

 clusters of 12-16 pairs, occupying greater part of the front of 

 each internode. 



Port Philip Heads, Mr. J. Braeebridge Wilson. 



The only specimen I have of this very distinct species is that 

 figured. Being the extremity of a growing branch the secondary 

 branches are not so fully formed as in older parts, one on a side 

 being sometimes undeveloped or aborted. 



9. A. Brogxiaetii, Kirkpatrick. 

 (Plate B., Fig. 3.) 



Amathia Brogtiiartii, Kirkpatrick, Ann. and Mag. Nat. Hist., 

 July, 1888. 



Zoarium consisting of dichotomously divided branches. Inter- 

 nodes long, thick and straight, occupied for almost the whole 

 length by a biserial cluster of long, nearly uniform, connate 

 zocecia. 



Port Philip Heads, Mr. J. Braeebridge Wilson. 



Distinguished by the great length and straightness of the 

 internodes and the number of the zooecia from A. biseriata, the 

 only species with which it can be confounded. I give Kirkpatrick 

 as the authority for the name, as Desmarest and Leseur, who 

 seem to have indicated it and from whom Mr. Kirkpatrick took 



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