4 Proceedings of the Royal Society of Victoria. 



In our own seas it is rather a rare form, and is usually, I 

 believe, dredged from a depth of about twenty fathoms. 



It is noted as a common characteristic genus in our older 

 Tertiaries by Dr. MacGillivray in his " Monograph of the 

 Victorian Tertiary Polyzoa." 



In common with several other geologists I regard the beds 

 from which Dr. MacGillivray's Tertiary Polyzoa came, and from 

 which I obtained these specimens, as of Eocene age. 



The localities at which I have found examples are Mornington ; 

 Mouth of Duck Ponds Creek, Corio Bay (bore) ; Campbell's 

 Point ; Belmont (well sinking) ; Birregurra ; Southern Moora- 

 bool Valley ; Shelford ; Muddy Creek. 



EXPLANATION OF PLATE. 



The Figures are all drawn from Fossil Specimens. 



Figs. 1, 2, 3, 4. — Calcareous joints of Anchoring Tubes of 



Adeona. Enlarged. 

 Fig. 5. — Portion of external surface of same, showing corded 



nature of the surface and openings of pores. 

 Fig. 6. — Transverse section of same, infiltrated with pyrites. 



x 22. 

 Fig. 7. — Portion of 6 more highly magnified. 

 Fig. 8. —Longitudinal section showing bifurcation of central 



canal at point where branch is given off. x 22. 



(Figs. 6, 7, 8, drawn under the camera lucida). 



