INDIANA PALAEONTOLOGY. 204. 



teen to twenty millimeters. Depth five to ten millimeters. Near the margin 

 of the cups there is numerous rounded and well defined striae, eight in the space 

 of five millimeters ; they disappear before reaching the bottom of the calix. 

 The vesicles do not interfere with the striae; usually they are large and eon- 

 fined to the bottom of the cup. The vesicles on the exterior of decorticated 

 specimens are very numerous and small. 



The small corallum, with the broad base and thin invaginated caliees, with 

 their margins crenulated, makes this easily recognized from all other species. 



Found in the Middle Devonian, (upper Helderberg group) at the Falls of 

 the Ohio. Now in the collection of the author. 



Dates of Publication of Contribution to Indiana Palaeontology. 



Part 1. February 28, 1898. 

 Part 2. January 20, 1899. 

 Part 3. April 17, 1899. 

 Part 4. January 29, 1900. 

 Part 5. February 27, 1900. 

 Part 6. February 12, 1901. 

 Part 7. May 23, 1901. 

 Part 8. August 14, 1901. 

 Part 9. May 14, 1902. 

 Part 10. September 4, 1902. 

 Part 11. February 3, 1903. 

 Part 12. July 18, 1903. 

 Part 13. August 27, 1903. 

 Part 14. September 24, 1903. 

 Part 15. October 22, 1903. 

 Part 16. December 21, 1903. 

 Part 17. May 9, 1904. 

 Part 18. June 22, 1904. 

 Part 19. July 20, 1904. 

 Part 20. September 20, 1904. 



