Blastoidocrinus carchariaedens Billings (sp.) 



Pa^e 07 



Views of four different first wing plates are presented in figures a-d ; of four 

 second wing plates in figures e-h (though h may possibly represent a third 

 wing plate) ; and views of three different third wing plates are given in 

 figures 1-k. 



Figures a, e and i are of sides of plates, figure d shows the plate as viewed 

 from one end, figure k from the inner edge and showing impressions of 

 covering pieces which have been outlined in figure 1, while the six remain- 

 ing figures are of outer surfaces. 



The ornamentation of f was produced by additions to the sides and to the 

 lower end of the plate which were made successively after periods of rest. 

 This marking has been more or less masked in the other plates figured. 

 The third wing plate shown at k evidently did not terminate the line but 

 must have been followed by a fourth. 



These plates are now in the New York State Museum. 



