Tertiary Polyzoa of Victoria. 9 



The apertures of some of the ooecia are not quite perfect, and 

 I have shown the lateral zooecia in outline only but in shadow, 

 so as to facilitate the recognition of the form of one series, 

 indicating the position of the ooecia in the lateral series by the 

 letter " O." The outline of these will show the great irregularity 

 of the rugose margins. In the front view it is almost impossible 

 to show this or their height above the level of the thyi'ostome ; 

 the lateral series in the infertile zoarium is also indicated in 

 outline and in shadow. I have also drawn an outline of the 

 thyrostome (Fig. lib) on a much larger (3| times) scale so as to 

 show its structure better. 



DESCRIPTION OF PLATES I. and II. 



Fig. 1. — Cellaria biaperta. 



2. — Cellaria biseriata. 



3. — Membranipora spiculifera. 



4. — Membranipora morningtoniensis. 



5. — Membranipora dennanti. 



6. — Membranipora incurvata. 



7. — Amphiblestrum crassissimum. 



8. — Amphiblestrum robustum. 



9. — Amphiblestrum bispinosum. 

 10. — Amphiblestrum concavum. 

 11. — Selenaria cribrosa. 

 12. — Caleschara parva. 

 13. — Thalamoporella gracilis. 

 14. — Thalamoporella rosieri, form longirostrata. 

 1 5. — Palmicellaria quadrif rons. 

 1 6. — Palmicellaria uniserialis. 

 17. — Characodoma halli. 



