84 BRT0Z0A FROM THE MIDDLE LIAS. [Feb. 1 894, 



Figs. 14, 15. Zocecia and cistern-cells of so-called Diastopora, from the Great 

 Oolite. X 50. 



16.17. Cisternifera inconstans. Zooecia (?) with apertural plates. X60. 

 18. „ „ forma tertia, with recessed apertural 



plate and openings. X 60. 

 19,20,21. „ „ „ Zooecia. Figs. 19 & 20 



with oral bar. X 60. 



Plate VI. 



Figs. 1, 4. Cisternifera inconstans, forma tertia. Zooecia with traces of supra-oral 



ovicell. X 60. 



2. „ „ „ Zocecium. x60. 



3. „ „ „ with perforated curtain over 



mouth of zocecium. x 60. 

 5. Cisternifera inconstans, forma quarta. Zocecium with spherical body 



covering tubule. x60. 

 6, 7. „ „ „ Zocecia with apertural plates and 



labial aperture. X 60. 

 8,10,11. „ „ „ Zocecia. x60. 



9, 12. ,, „ „ Zocecia with tubules developed 



into loops. x60. 

 13. „ ,, „ Zoarium. x25. 



14. 18. ,, „ forma secunda. Zocecia with apertural plates and 



labial aj)ertures. X 60. 

 15,16,19,21. „ „ „ Shovel-shaped zocecia. x60. 



17. „ ,, ,, Zocecium with traces of ovicell. 



X60. 

 20. „ „ „ Zocecium. x60. 



22. „ „ „ Zocecium with apertural plate. 



X60. 



Plate VII. 



Figs. 1,5, 6. Cisternifera clausa, gen. & sp. nov. Zocecia showing traces of 



supra-oral ovicell. x60. 

 2, 3, 4, 9. „ „ Zooecia with apertural plate, ovoid aperture. 



X60. 



7. „ ,, Cistern-cell with spout-like opening. x60. 



8. „ ,, Zocecium showing the position of the ovicell - 



tube from above. X 60. 

 11. ,, ,, Zoarium. xl4. 



10, 12. „ inconstans. Cistern-cells (fig. 10 shows young cell). 



X100. 

 13,14. „ „ Zocecia showing labial aperture. X60. 



15. „ „ Showing the terminations of the surface- 



pores. X 200. 



16. h inconstans. Xl4. 



17. ,, clausa. xl4. 



DlSCESSION. 



Dr. G. J. Hinde wished to call attention to the remarkably- 

 perfect condition of preservation of the delicate bryozoa described 

 by the Author, which appeared to have resulted from their having 

 been enclosed in the interior of ferruginous nodular masses, much in 

 the same way as the fine material in the interior of Chalk flints. 

 In the same material the Author had also discovered some equally 

 perfect, almost microscopic calcisponges, which he (the speaker) had 

 described. 



