FOSSILS OF THE BUELIXGTOX GEOUP. 



Summit, when the minute pieces that doubtless closed 

 the central region are removed, with a pentagonal open- 

 ing of about the size of the anal aperture; so-called ova- 

 rian pores very small, and situated one on each side of 

 each interradial piece, and two others doubtless as usual 

 opening into the anal aperture, which is nearly circular 

 and much larger than the pores. 



Surface finely granular, the granules being smaller and 

 more crowded on a lanceolate area, extending up the radial 

 pieces between the pseudo-ambulacra, and terminating just 

 before reaching the interradials, and on each side, and 

 above this space. 



Hight of body, 0.30 inch; breadth, 0.28 inch. 



This little species might be mistaken for a small specimen of G. we/o, 

 by a hasty observer. It may be readily distinguished, however, by its 

 longer iuterradial pieces, less numerous and proportionally larger pore 

 pieces, much more prominent pseudo-ambulacra, and particularly by 

 not having even a trace of a linear furrow along up the sutures separa- 

 ting the radial pieces, and these pieces flat instead of convex across 

 between the pseudo-ambulacra. The little projecting points at the 

 bases of its pseudo-ambulacra are also directed more downward. 



Locality and position Upper part of the Burlington group, Burling- 

 ton. Iowa. Lower Carboniferous. Xo. 397 of Mr. WACHSiiUTH's collec- 

 tion. 



XEGLECTUS, M. and W. 



PI. 9, Fig. 3. 

 Granatocrinus nfgltctus, MEEK and WORTHEX. -Proceed. Acad. Xat. Sci., Phila., 1869, p. 90. 



BODY small, varying from oval to subglobose. Base 

 slightly projecting, pentagonal in outline. Radial pieces 

 scarcely equaling two-thirds the entire length, and deeply 

 divided by the pseudo-ambulacra! areas. Interradial pieces 

 more than one-third the length of the body, cuneate-sub- 

 trigonal in form. Anal piece of about the same size as 

 the interradials, but its upper extremity is erect and dis- 

 tinctly projecting, so as to form around the anal opening 



