Butliotrcphls ramulosus. 235 



Length of a specimen about one inch ; diameter at the aperture 

 about \\ lines ; width of the annulatious at the aperture about half 

 line, which gradually diminish to less than one quarter that size, and 

 become nearly obsolete as they approach the closed end of the tube. 



While some of the tubes appear to be slightly curved toward the 

 l^oint, yet the numbers observed, which are broken across each other 

 and across coral stems and other inequalities of the surface with which 



Fig. 2S—Tentaculiies Richnumdensis, maguified frum 1 inch to 1^ inches in length. 



they came in contact (as shoAvn by Fig. 28), indicate that the tubes 

 were very slightly, if at all, flexuous. 



They Avere found in the upper part of the Cincinnati Group, near 

 Eichmond, Indiana, by Mrs. M. P. Haines, on slabs, dispersed and 

 scattered in every direction, in great abundance. They do not appear 

 to have ever been attached to each othei* or to any other body, nor to 

 have lived in clusters, yet on one particular slab, not more than six 

 inches square, in the cabinet of Mrs. Haines, there may be more than 

 a hundred tubes scattered, wholly without order, in every direction. A 

 slab, however, of that size, with a dozen of these tubes on it, may be 

 j'egarded as a reasonably good specimen. 



The tubes have a marked resemblance to ConchicoUtes f flexuosa 

 (Hall), though they may be readily distinguished by their much 

 larger size, straight instead of curved form and free instead of attached 

 habit. While I think that the latter are not always curved nor always 

 attached, yet that is the general condition in which they are found, 

 but this sjiecies does not appear to have ever been attached, and it is 

 doubtful whether it was in the least flexuous in its living state. 



Buthotreplm ramnlosus — (S. A. Miller). 



Fossil ramose ; stems branching ; branches bifurcating, with very 

 little change in size. Diameter of stems and branches from yV^^^ ^^ 

 -jJ^th inch. Structure not distinct, but has a granular appearance, as 

 if from some change in its character. 



This fossil appears to have formed the nucleus around and through 

 which blue clay nodules, from two to ten inches in diameter, were 

 formed at the bed of the ocean. 



These clay nodules, or indurated marl stones, form entire layers of 

 strata for hundreds of feet in length, between six and twelve feet 



