168 Proceedings of the Royal Society of Victoria. 



The specimen is small, consisting of three zooecia only, but is in 

 very good preservation save that the spines are Vjroken off. The 

 dorsal surface of the ventricose portion of the topmost zooecium 

 is concave with a slightly thickened margin, part of which is 

 seen through the aperture in the front view ; this I think shows 

 that it once bore an ocecium, which has been broken off. The 

 zooecia are more closely connected than those of the recent species 

 of Bicellaria, but I think there is no doubt it belongs to that 

 genus. 



EXPLANATION OF FIGURES. 

 Plates XVII. and XVIII. 



Fig. 1. Bigemellaria pedunculata. 

 ,, 2. Liriozoa Isevigata (front aspect). 

 ,, '^a. Liriozoa laevigata (dorsal aspect). 

 „ 3. Calwellia otwayensis. 



,, 3a. Calwellia otwayensis (more highly magnified). 

 ,, '6b. Calwellia otwayensis (upper part of two zooecia seen 



from above). 

 ,, 3^. Calwellia otwayensis (thyrostome and avicularium). 

 ,, 4. Cellularia triangulata. 



„ 4a. Cellularia triangulata (more highly magnified). 

 ,, 5. Scrupocellaria glomerata. 

 ,, 5a. Scrupocellaria glomerata (dorsal surface). 

 ,, 6. Amastigia acuminata. 

 ,, 6a. Amastigia acuminata (dorsal surface). 

 „ 7. Caberea morningtoniensis. 



,, la. Caberea morningtoniensis (more highly magnified). 

 ,, 8. Menipea retroversa. 

 „ 8a. Menipea retroversa (dorsal surface). 

 ,, 9. Menipea bicellata. 

 ,, 9a. Menipea bicellata. 

 „ 9^. Menipea bicellata (dorsal surface). 



,, 10. Menipea biaviculata. 



„ 10a. Menipea biaviculata (dorsal surface). 



„ 11. Cellaria contigua (avicularian mandible). 



„ 1 la. Cellaria contigua (avicularian cell). 



