PLATE XXXVI. 



PAGE. 



Fig. 1. BATOSTOMA VAEIABILE Ulr ;o 



Surface of example represented, by figure 5, on pi. XXXV, x!2. This 

 specimen is remarkable in having exceedingly few mesopo es. 



Fig. 2. AMPLEXOPORA AFFINIS Ulr 460 



2. A fragment of this species. Natural size. 



2 a. Tangential section of same, showing the thin walls and large acantho- 



pores x!8. 



Cincinnati group, Wilmington, 111. 



Illinois State Museum, and E. O. Ulrieh's collection. 



Fig. 3. AMPLEXOPORA PUSTULOSA Ulr 451 



3. A subramose example. Natural size. 

 :i a. Surface of same xli. 



3 b. Tangential section x!8, showing the thin walls and small acanthopores. 



3 c. Part of a vertical section x!8. 



Cincinnati group, Hanover, O. 

 E. O. Ulrich's collection. 



Fig. 4 LEPTOTBYPA? STIDHAMI Ulr 456 



4. A characteristic example of this species. Natural size. 



4 a. Tangential section, showing the thin walls, unequal zooecia and large 



acanthopores, x!8. 



4 b. Vertical section showing the regular tabulation, x!8. 



Cincinnati group, Brown Co., Ohio. 

 E. O. Ulrich's collection. 



Fig. 5. LEPTOTRYPA SEMIPILAKIS Ulr 457 



5. A discoidal example. 



5 a. A smaller hemispheric specimen. 



5 b. A sectional view of 5, all natural size. 



5 c. Tangential section, x!8. 



5 d. Vertical section x!8, showing the untabulated long tubes, and several 



acanthopores. 



Cincinnati, Ohio. 



E. O. Ulrich's collection. 



