4 SMITHSONIAN INSTITUTION 



During the season of 1910 Mr. Frederick Braun, while collecting for me 

 in western Tennessee, discovered at several localities of the same horizon in 

 Benton County numerous unmistakable fragments of Scyphocrinus associated 

 with those of Camarocrinus in the same deposits. They were in the much 

 disintegrated remains of what had evidently been a bed of considerable extent, 

 and the appearance of the specimens and their mode of preservation were so 

 similar as to indicate a common origin. All were fragmentary, and the strata 

 from which they were derived were not located in place. In Hardin County, 

 Dr. August F. Foerste had some years before collected from an equivalent bed 

 a number of unusually fine specimens of Camarocrinus; these were very firm, 

 globose, and heavy, much like those described by Schuchert from Oklahoma. 

 Their occurrence was noted in his paper on Silurian and Devonian Limestones 

 of Western Tennessee, 1 but nothing was said about any other associated 

 remains. 



Among later collections made by Dr. E. O. Ulrich in the Camarocrinus 

 bed of the Haragan limestone of Oklahoma were found two good calices of 

 Scyphocrinus, thus supplying the evidence of association in that region which 

 had before been wanting. In the meantime there had also been obtained among 

 collections made at the West Virginia locality part of the calyx of a small 

 species of Scyphocrinus, which established a similar association with the 

 Camarocrinus occurring in those beds. These last occurrences have been noted 

 by Dr. Kirk ' in his paper on Eleutherozoic Pelmatozoa. 



In 1904 Dr. R. S. Bassler, as recorded by Schuchert, observed Camaro- 

 crinus associated with numerous large crinoid stems a few miles north of Cape 

 Girardeau, Missouri, along the bluffs of the Mississippi River, in a layer 

 belonging to strata of the Bailey limestone (considered to be about equivalent 

 to the New Scotland beds) of Helderbergian age; and in 191 1 Dr. Ulrich found 

 a detached mass of limestone from the same layer composed almost entirely 

 of crinoid stems cemented together, among which was imbedded the well- 

 preserved calyx of a large Scyphocrinus. The condition of the specimen was 

 so promising of favorable results as to warrant a special investigation, in hope 

 of finding the fossiliferous bed at some place sufficiently exposed for careful 

 collecting. 



Accordingly, during the season of 19 12, Mr. Braun was sent to this 

 locality for the purpose of a thorough examination, and after protracted search 

 for several miles along the bluffs facing the Mississippi River, he succeeded 

 in locating the crinoidal layer at an accessible point." Here, with his usual 



'Journal of Geology, vol. 11, p. 683, 1903. 

 ' Proc. U. S. National Museum, vol. 41, p. 55, 1911. 



*Rep. U. S. National Museum, p. 80, 1913; Proc U. S. National Museum (Bassler), vol. 46, 

 P- 58, 1913. 



