62 NEW YORK STATE MUSEUM 



Hederella ramea, sp. nov. 



Plate 9, flg. 9 



A very graceful zoarium consisting of a primitive stock from which 

 branches arise on either side at distant and highly irregular intervals, 

 the secondary branching arising from the principal branches in such a 

 way as to produce a palmate frond. The cells are subcylindric, smooth 

 and procumbent at their extremities. 



Hederella gracilior, sp. nov. 



Plate 9, flg. 10 



In this species the zoarium attains about the size of that in H e d . 

 filiformis Hall and Simpson of the Hamilton shales, but the form 

 of the colony is less diffuse, the double series of cells retaining a 

 compact form and the entire zoarium being a miniature of H e d . 

 magna. To the difference in size of the cells in these two species 

 are added as distinguishing characters the flattened and less rugose 

 condition of the cells and their more slender and regular form. 



CRINOIDEA 

 Edriocrinus becraftensis, sp. nov. 



Plate 9, flg. 12, 13 



The calyxes of this species may be distinguished from those of 

 Edr. sacculus Hall from the Oriskany sandstone of Cumberland 

 Md. in their elongate, much more slender and very gradually enlarging 

 form, and generally quite small size. They are blunt but not broad at 

 the base and enlarge upward with gently incurving sides. In one in- 

 stance only has the upper edge of the calyx been observed, and ex- 

 cept for this edge no specimen shows traces of the component plates. 



The casts of the calyx are not infrequent. 



ANTHOZOA 

 Zaphrentis sp. 



These fossils occur as casts of the calyx. Two forms are evident, 

 one, the smaller, conforming to the characters of Zaphrentis, the 

 larger differing from this structure in the presence of double series 

 of tubercles in the lamellar interspaces. 



