ON SOME PELMATOZOA FROM CHAZY LIMESTONE OF NEW YORK \2J 



Interradials and interbrachials with highly convex somewhat 

 polished surfaces resembling a setting of precious stones. The 

 cup analysis, figure 6, shows best the relation of these but in the 

 crushed interradial areas a few of the lines may be due to frac- 

 tures instead of sutures. Plate 9 will show clearly the appearance 

 of some of these interradial " jeweled " areas. 



Tegmen of some hundreds of very small plates running out to and 

 a little over the bases of the arms and merging into well defined 

 rows of covering plates. The tegmen with this extended cover- 

 ing of the arms and pinnules forms a wide and rather smooth basin 

 save for the pointed elevations of the tegmen plates. The tegmen 

 has been crushed in on one side and the structure of the anus is 

 not clearly manifest. 



Remarks. This species is closely allied to Lyriocrinus ? 

 beecheri Hudson 1 and the latter belongs to the present genus 

 and should be known as Hercocrinus beecheri. H. 

 beecheri lacks the larger more flattened and pentangular base, 

 the five prominent triangular indentations of which the lower angle 

 of each radial forms a part, and the more numerous convex polished 

 interradials of H. e 1 e g a n s. 



Hercocrinus ornatus sp. nov. 



Plate 10; cup analysis figure 7 of text 



Description of type. Cup nearly globular, greatest width 13.5 

 mm, at base of primaxils ; narrowing above to 11.5 at II Br 2 . Im- 

 mediately above this plate the arm starts outward at an angle of 

 about 45 degrees. From the bases of the primaxils the cup curves 

 regularly downward to a width of 5 mm at the edge of the basal 

 concavity. Vertical hight from base to tegmen 11 mm. 



Infrabasals small, completely hidden by the proximal portion 

 of the column. Basals with a rough raised transverse ridge which 

 forms a raised circular border to the rather narrow basal con- 

 vexity. From this ridge the face of the plates is directed outward 

 at an angle of the cup. In addition to this ridge there is another 

 rough and prominent one parallel with it but near the outer margin 

 of the basals. These plates possess a few shorter ridges and 

 numerous pitted depressions, giving them a rather rough and re- 

 ticulated aspect. 



The radials are but little larger than the exposed surface of the 

 basals, they are also similarly roughened by fine reticulated ridges 



»N. Y. State Pal. An. Rep't. 1003. pi. 3, p. 277. 



