DESCRIPTIONS OF SPECIES. 401 



1893. Spiriferina kentuckiensis. Hall and Clarke, Pal. New York, vol. 8, pt. 2, p. 52, pi. 29, fig. 17; pi. 



36, figs. 14-16. (Advance distribution in fascicles.) 

 Coal Measures: Yinton County, Ohio; Illinois. 



1894. Spiriferina kentuckiensis. Keyes, Missouri Geol. Surv., vol. 5, p. 86. 

 Upper Coal Measures: Kansas Cit}' and Lexington, Mo. 



1895. Spiriferina kentuckiensis. Hall and Clarke, Pal. New York, vol. 8, pt. 2, p. 52, pi. 29, fig. 17; pi. 



36, figs. 14-16. 

 Coal Measures: Vinton County, Ohio; Illinois. 



1896. Spiriferina cristafa. Smith (pars), Am. Phil. Soc, Proc, vol. 35, p. 242. 

 Lower Coal Measures: Conway County, Ark. 



Upper Coal Measures: Sebastian County, Ark., and Poteau Mountain, Indian Territory. 

 1896. Spiriferina cristata. Smith (pars), Leland Stanford Junior Univ. Publ., Gont. Biol. Hopkins 

 Seaside Lab., No. 9, p. 32. 

 Lower Coal Measures: Conway County, Ark. 



Upper Coal Measures: Sebastian County, Ark., and Poteau Mountain, Indian Territory. 

 1900. Spiriferina cristata. Beede, Univ. Geol. Surv. Kansas, Rept., vol. 6, p. 96. 



Upper and Lower Coal Measures: Fort Scott, Bronson, Bourbon County," Thayer, Kansas 

 City, Lawrence, Lecouipton,' Topeka, Kans. 



In connectioa with the preceding species attention was called anew to the fact 

 that there are at least two distinct types of Spiriferina occurring in our Coal Measure 

 strata, one, like Spiriferina spinosa Hall, of the Chester, with pustulose or spinose 

 ornamentation, the other with line imbricating concentric striaj. 



The form described b_v Hall as Sp. octoplicata Sow. % which ma}^ be regarded as 

 the type of Sp. hentuckyensis Shumard, certainlj' belongs to the striated group. 

 Spiriferina l-entuckyensis has often been placed in the synonym}' of Sp. cristata 

 Schlotheim. 



The original description of Sp. cristata" gives no clue to the minuter surface 

 ornamentation of that species, and the figures only imperfectly disclose it. The 

 specimens examined by me, which seem to be most nearlj' typical of Schlotheim's 

 species, come from the middle Zechstein of Posneck, Thuringia. The identifica- 

 tion was made by Geinitz. This material resembles Schlotheim's figures, both in 

 general configuration and in surface ornamentation. The latter is rather variable. 

 It seems to consist of concentric lamellose striae, in some specimens so distant as to 

 answer to the growth lines of Sp). gonionotus., and in others so close together that 

 they exhibit the type of ornamentation seen in Sp). kentuckyensis, but never in the 

 specimens examined is there any development of the pustulose ornamentation char- 

 acteristic of Sp. gonionotus^ even when the concentric markings are as distant as in 

 that species. The intervening spaces are left nearly smooth; and the punctation is 

 so fine as to be scarcelj^ discernible. Thus it would seem that Sp. cristata belongs to 

 the division of Spj. kentuckyensis rather than to that of Sp. gonionotus and Sp. spitiosa. 



" Suhlotheim, 1816. Beitr. zur Naturg. der Versteinerungen; Kon. Bay. Akad. der Wissensch. zu Munchen.Denkschr., 

 p. 28, pi. 1, flgs. 3a, 3b, 3c. 



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