Plate LXXVIII Continued. 



PAGE. 



Fig. ti. GLYPTOPOKA SAGENELLA Prout 513 



6 and (i a. Opposite views of a small example of the typical form of this 

 species. 



Keokuk group, Bentonsport, Iowa. 

 Illinois State 'Museum. 



Fig. 7. GLYPTOPOBA SAGENELLA var. LATA, Ulr 515 



Complete example of this variety, natural size. The opposite side is 

 similarly divided into cup-shaped spaces, only where on this side we 

 see the bottom of a cup, the other shows a ridge. 

 Warsaw beds, Warsaw, 111. 

 Illinois State Museum. 



Fig. 8. GLYPTOPOKA MICHELINIA Prout 515 



8. Cupuliferous surface of an example of this species, natural size. 



8 a. Opposite or epitheeal surface of same. The specimen is worn through 

 the epitheca, so that the vertical lamina 1 are shown. 



8 6. A very small but high example, natural size, showing the faint dim- 



ples on the sides of the cups. 

 Warsaw beds, Barrett's Station, Mo. 

 Illinois State Museum. 



Fig. 9. GLYPTOPOBA PUNCTIPOKA Ulr 519 



9. Surface of a leaf of this species, x9, showing a dimple, and the ar- 



rangement of the compressed zooecia apertures. 



9 a. Small portion of same, x!8. 



Chester group, Monroe Co., 111. 

 Illinois State Museum. 



Fig. 10. GLYPTOPORA ELEGANS Prout 518 



10. Nearly complete but small example, showing the arrangement of the 



leaves into deep cups ; natural size. This figure also serves to illus- 

 trate the mode of growth of G. keyserlingi, G. megastoma and ';. 

 punctipora. 



Warsaw beds, Warsaw, 111. 

 Illinois State Museum. 



10 a. Surface of another specimen, x!'. 



10 b. Portion of same, x!8. showing the zooecia apertures in a good state of 

 preservation, 



10 o. Vertical section, x!8. showing several zooecia] tubes throughout their 

 length on both sides of the median lamina. 



10 d and 10 e. Two small portions of a tangential section. 



