PLATE LXXVI. 



PAGE 



Fig. 1. MEEKOPORA? APEBTA Ulr ..485 



1. An example of the natural size, showing the irregular mode of branch- 



ing, with a portion of the surface x!i. 



1 a. Tangential section, xlH. 



Keokuk group, King's Mountain. Ky. 

 E. O. Ulrich's collection. 



Fig. 2. CYSTODICTYA PUSTULOSA Ulr 495 



2. A. specimen showing its natural size and the arrangement, of the zooecia 



apertures. 



2 a. Portion of surface of same, x!), showing the papilliform elevation of the 



zooecia apertures. 



Keokuk group, King's Mountain, Ky. 



E. 0. Ulrich's collection. 



Fig. s. CYSTODICTYA LINEATA var. MAJOE Ulr 45 



An example of this variety, natural size. The diagonal arrangement 

 of the zooecia is more conspicuous in the drawing than natural. 

 St. Louis limestone,? Alton, 111. 

 Illinois State Museum. 



Fig. 4. CYSTODICTYA NITIDA Ulr 493 



4. An example of the natural size, showing its mode of branching. 

 4 a and 4 1>. Portions of its surface, x9 and 18, showing the fully matured 

 condition of the zoarium. 



4 c. Small portion of the surface of another well preserved b it less fully 



matured example, x!8. 

 Keokuk group, Bentonsport, Iowa. 

 Illinois State Museum. 



Fig. 5. CYSTODICTYA AMEEICANA Ulr 494 



5 and 5 a. Two fragments of the natural size. The zocecia are ranged in 



from three to flve rows, and, when magnified, closely resemble those of 

 fig. 4 c. 



Fig. 6. MEEKOPOKA CLAUSA Ulr. (See also PL LXXVII) 485 



A fragment of this species, showing its natural size and the arrange- 

 ment of the maculse and zooecia. 

 Chester group, Sloan's Valley, Ky. 

 E. 0. Ulrich's collection. 



