Beecher — Observations on the Genus Romingeria. 11 



Plate IV. 



Rowiingeria umbellifera Billings, sp. 



Figure 1. — Side view of a portion of a colony ; showing the storied effect, 

 with supporting columns, produced by the regular proliferation periods in 

 this species, x |. 



Plate V. 



Figure 1. — Proliferation diagram of Rominge^Ha umbellifera Billings, sp, ; 

 showing two generations of normal budding. The parent corallite is in the 

 center. 



Figure 2. — Proliferation diagram of Romingeria Jacksoni Beecher. 



Figure 3. — Proliferation diagram of Romingeria tninor Beecher. 



Romingeria conimutata Beecher. 



Figure 4. — A portion of two branches in contact, with the walls of one 

 broken away ; showing the connecting mural pore and the rows of spinules. 



x4. 

 Taken from specimen No. 8849, Collection of Museum of Comparative 

 Zoology. 



Type of figure 1, Plate 76, Kentucky Fossil Corals, W. J. Davis. 

 Corniferous limestone, Falls of the Ohio. 

 Figure 5. — The broken ends of four corallites from the same specimen. ; 

 showing the strong lines of trabeculaB on the interior, x 4. 



Romingeria minor Beecher. 



Figure 6. — Side view of an umbel of this species, x 4. 

 Figure 7. — Side view of an umbel; showing the buds extending out 'at 

 right angles to the parent corallite. Type, x 4. 



Figure 8. — Top view of the preceding ; showing the normal number of 

 five buds in the verticel. x 4. 



Figure 9. — Side view of an umbel similar to the preceding, x 4. 

 Corniferous limestone, near Leroy, New York. 

 Collection, Yale University Museum. 



Romingeria Jacksoni Beecher. 



Figure 10. — A longitudinal section of a corallum in which the corallites 

 are prismatic, except on the exterior. The peripheral corallites turn out- 

 ward on some parts of the specimen (not shown) and develop normal umbels. 



x4. 



Figure 11. — Side view of a corallite, with a broken circlet of buds at the 

 top. One of the buds shows the initial pore, and the adjacent bud preserves 

 a portion of a tabula, x 4. 



Figure 12. — Two umbels taken from the specimen figure 14 ; showing 

 characteristics of this species, x 4. 



Figure 13. — Base of an umbel ; showing the normal number of seven 

 buds. X 4. 



Figure 14. — Side view of the preceding, x 4. 



Figure 15. — Top view of a portion of a colony ; showing the general habit 

 of growth. Type, x 4. 



Corniferous limestone, near Leroy, New York. 

 Collection, Yale University Museum. 



Romingeria umbellifera Billings. 



Figure 16. — Basal view of a portion of the specimen shown on Plate IV ] 

 showing the disposition of the umbels. Natural size. 

 Corniferous limestone, near Leroy, New York. 

 Collection, Yale University Museum. 



