PLATE i 

 Acicularia, Acroporella, Actinoporella, Anthracoporella 



Figs, i, 3. Acicularia antiqua Pia, random cuts in thin-section, x6o. Cretaceous, 

 Barremian-Aptian, Upper Musandam Formation : Jebel Hagab, Oman, Arabia. V. 52031. 



Fig. 2. Actinoporella podolica Alth, near-vertical section through stem-cell and two branches 

 of one verticil, X28. Cretaceous, Valanginian, Garagu Formation : Banik, Mosul Liwa, 

 Iraq. V. 41630. 



Fig. 4. A . podolica, near-horizontal section through a verticil, X45. Cretaceous, Valanginian- 

 Hauterivian, Sarmord Formation ; Jebel Gara, Mosul Liwa, Iraq. V. 41579. 



Fig. 5. Acroporella assurbanipali gen. et sp. nov., oblique-vertical section, X20. Holotype. 

 Cretaceous, Valanginian-Hauterivian, Garagu Formation ; subsurface, Kirkuk Well no. 116. 

 V. 52032. 



Fig. 6. Acicularia (Briardina) sp., thin-section along spicule, x6o. Palaeocene-Lower 

 Eocene ; Sahil Maleh, Batinah Coast, Oman, Arabia. V. 52033. 



Fig. 7. A. podolica, typical random tangential-vertical cut through adjacent radial tubules 

 of verticil, X30. Cretaceous, Valanginian-Hauterivian, Sarmord Formation ; Jebel Gara, 

 Mosul Liwa, Iraq. V. 52034. 



Fig. 8. Anthracoporella mercurii sp. nov., thin-section, holotype. Permian, Bih Dolomite ; 

 Wady Bih, Jebel Hagab, Peninsular Oman, Arabia. V. 52035. 



