256 Wachsmuth and Springer— Revision of the genus 



unknown. Arms, ten so far as observed. Pinnules long and 

 strong. Column pentagonal. 



As yet found only in the Upper and Lower 'Burlington 

 limestone. 



The following species, new to science, have been discovered 

 by us: 



Belemnocrinus florifer, n. sp. 



Smaller than B. typus. Column comparatively large, com- 

 posed alternately of large and small joints, the smaller of which 

 are nearly regular pentagons, and the larger pentagonal in out- 

 line, arched at the angles, notched in the middle of the sides 

 making the column in general disl ■ crenulated 



transversely, with a 3 I longitudinal furrow 



along the middle of each side. To the sixth and eighth large 

 joint from the base, are attached radicular cirrhi which 

 in the depressions or notches on each of the five sides of the 

 joint. Traces of other sets of cirrhi are visible lower down on 

 the column. They are all arranged precisely as those of Penta- 

 criim.s Gipnt-M^hjsie, to the column of which this is in aspect 

 strikingly similar. The cirrhi are long, slender, tapering to the 

 tips, with joints longer than wide, and they increase in size as 

 they approach the root. 



The calyx is comparatively low, about two thirds as wide as 

 high, ovoid below, turbinate and rapidly expanding above, con- 

 stricted about the middle, with a deep transverse suture. The 

 five basal plates are smooth, about three fourths as wide as high, 

 slightly widest near the top, forming the ovoid portion of the 

 calyx, gently expanding from the column outward and upward. 

 They are constricted and abruptly truncated at the summit and 

 appear as a heavy band around the lower part of a second cup 

 which seems to rest in this one. The first radials are lar 

 than one half the size of the basals, a little higher than wide ; 

 outer surface strongly arched, curving rapidly inward at their 

 junction with each other, thus forming deep vertical sutures. 

 Th< v c> mpose. .vith th ■ anal plate, a cup of conical shape whose 

 Bides are crenulated or scalloped by the arching of the plates and 

 the depression of the s 

 torn is considerably le 

 in which, rather than upon which, i 



lie in a line with the sutures of the basals and rest apparently 

 upon the inner edges of the upper faces of these plates. The 

 upper portion of this conical cup in turn projects outward in a 

 rim or band enclosing the arm bases, the arms seeming to pro- 

 ceed from the inside, the calyx and arms thus piv..s« -utiug the 



appearance of a bouquet of flow. 

 J turn rests in an egg-sha 



ped cup truncated i 



