Figure 42. Microstructure of coralline algae in thin sections. No. 1, Lithothamnium 

 concretum Howe (X50), Oligocene West Indies (after Howe). No. 2, Mesophyl- 

 lum sancti dionysii Lemoine (X50), Miocene, Algeria (after Lemoine). No. 3, 

 Archaeolithothamnium floridum (X 75) Johnson and Ferris, Eocene, Florida. 

 No. 4, Lithophyllum afif. prelichenoides Lemoine (X75), Miocene, Borneo. 



