Pixlcotiloloi^y of Ihf Cinciiiiiati Group. 95 



made up, apparently, of short pieces, with interstices (?) dis- 

 tinct, and rather open nearest the core and becoming more 

 and more compact outwardly, till, at the outer edge, they are 

 very close together, with hardly any divisions visible. In 

 another specimen, i ^4 inches long and the same in diameter, 

 the core has become decomposed and left a hollow space, with 

 indistinct marks of the diaphragms, but otherwise the char- 

 acters are the same." After referring to Billings's belief, that 

 the fossils were plants, and to Hyatt's that they were ceph- 

 alopods, Mr. James says : "I do not feel fully satisfied with 

 the conclusions of either, but until more light is thrown upon 

 the subject, it is the best, perhaps, that can be done with 

 these remarkable fossils." Two species only of the genus 

 have been described. These are given below. 



I. — B. NODULOSA, Billings, 1857. 



Surface covered wnth oblong, oval, or sub-triangular projec- 

 tions, I to 3 lines high, with rounded, blunt points nearer one 

 end of the prominence than the other; projections varying in 

 size, sometimes with a nearly circular base, sometimes 6 or 7 

 lines long and one-half as wide, distant i or 2 lines from each 

 other, arranged in rows or spirals ; whole surface fretted with 

 minute points, showing perforations when w^orn ; septa thin, 

 very concave, one line to one inch apart. (Rept. Geol. Sur. 

 Canada, for i853-'54-'55-'56, 1857, p. 343.) 



Locality. — Anticosti Island; Marion County, Ky.; Conners- 

 ville, Indiana. It has not been recorded from Ohio as far as 

 known. 



2. — B. UNDULATA, Billings, 1857. 



Surface sulcated longitudinally by short, irregular, wave- 

 like furrows, from two lines to one inch across ; otherwise 

 like the preceding ; specimens sometimes 10 feet long and 

 from 8 to 14 inches in diameter. (Ibid., p. 344.) 



Locality. — Anticosti Island; Marion County, Ky.; Rich- 

 mond, Indiana. 



Remarks. — These two species are very closely allied and 

 have been united b}' some writers. (Knott, Geol. of Marion 

 County, Kentucky, p. 32). Prof. Hyatt considers them dis- 

 tinct, and says they can be separated by internal characters. 



