DESCRIPTIONS OF SPECIES. 321 



1866. Cyaihaxmda (?) sp. Geinitz, Carb. und Dyas in Nebraska, pp. 65, 66, tab. 5, figs. 3, 4. 



Upper Coal Measures: Plattsmouth, Nebr. 

 1868. Cyathaxonia prolifera. McChesney, Chicago Acad. Sci., Trans., vol. 1, p. 1, pi. 2, figs. 1-3. 



Coal Measures: Springfield, 111. 



1872. Lophophyllum proliferum. Meek, TI. S. Geol. Surv. Nebraska, p. 149, pi. 5, figs. 4a, b. 



Upper Coal Measures: Nebraska City and Eock Bluff, Nebr.; Springfield and Lasalle, 111.; 

 Texas. 



1873. Lopkophyllum proliferum. Meek and Worthen, Geol. Surv. Illinois, Kept., vol. 5, p. 560, pi. 24, 



fig. 1. 



Upper Coal Measures: Springfield, 111. 

 1876. Lophophyllum proliferum. White, Powell's Kept. Geol. Uinta Mountains, p. 88. 



Lower Aubrey group: Confluence of Grand and Green rivers, Utah. 

 1884. Lophophylluvi proliferum. White, Geol. Surv. Indiana, 13th Bept., p. 118, pi. 28, tigs. 6, 7. " 



Coal Measures: Indiana; Illinois; Iowa. 



1887. Cyathaxonia prolifera. Foerste, Sci. Lab. Denison Univ., Bull., vol. 2, p. 86, pi. 7, figs. 15a-c. 

 Coal Measures: Flint Ridge and Bald Hill, Ohio. 



1888. Lophophyllum profunda. Foerste, Sci. Lab. Denison Univ., Bull., vol. 3, p. 136. 

 Coal Measures: Flint Ridge, Ohio. 



1888. Lophophyllum, proliferum. Keyes, Acad. Nat. Sci. Philadelphia, Proc, p. 225. 



Lower Coal Measures: Des Moines, Iowa. 

 1890. Lophophyllum profundum. Worthen, Geol. Surv. Illinois, Kept., vol. 8, p. 79, pi. 10, figs. 14, lia. 



Coal Measures: Lasalle, 111. 

 1894. Lophophylhim prolifeiiim. Keyes, Missouri Geol. Surv., vol. 4, p. 115, pi. 13, figs. 8a, b. 



Upper Coal Measures: Kansas City, Mo. 

 1897. Lophophyllum proliferum. Smith, Am. Phil. Soc, Proc, vol. 35, p. 25. 



Upper Coal Measures: Poteau Mountain, Indian Territory. 

 1900. Lophophyllum profundum. Beede, Univ. Geol. Surv. Kansas, Rept., vol. 6, p. 17. 



Upper and Lower Coal Measures: Fort Scott, Marmaton, Bourbon County, Thayer, Olathe, 

 Kansas City, Lawrence, Lecompton, Topeka, McFarland, Grand Summit, Kans. 



This species has been identified at nine localities, but it is represented for the 

 most part b}^ only one or two specimens at each. The material is not only scanty 

 but it is frequently fragmentary. It shows a high degree of variation in essential 

 points, such that in some examples, especially in the younger stages, it is not even 

 clear whether a pseudo-columella has been developed or not. In some specimens many 

 interseptal plates are pi'esent, in others none at all — at least in the sections examined. 

 Sometimes the septa are almost diagrammatic in their regularity and arrangement; 

 at other times they are contorted and their extremities connate into varying groups. 

 Occasionally the latter irregularity is carried to an extreme. Perhaps the most 

 diagnostic character consists in the number of the septa, and upon this basis it 

 is possible to distinguish two groups among the specimens examined. In ope of 

 these there are about 21 primary septa, in the other from 24 to 30. Alternating 

 with these, especially in the calicinal portion of the corallum, can sometimes be seen 

 an equal number of shorter secondary septa. Specimens from stations 2222, 2302, 

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