Ptilonaster princeps Hall 



Page 44 



i Holotype, x 2. Photograph of the gutta-percha squeeze from 

 which the original drawing was made. Actinal (ventral) 

 view of a ray. 

 Devonian: Portage (Ithaca) beds. Cortland, N. Y. 



Squamaster echinatus Ringueberg 

 Page 59 



2 Holotype. x 2. Specimen folded upon itself and rays exposing 



the abactinal (dorsal) side. 

 Silurian: Clinton (Rochester) shale, Lockport, N. Y. 



Klasmura mirabilis no v. 



Page 64 



(See plates 21 and 22) 



3 Actinal (ventral) view of ray lacking the integument and show- 



ing the ambulacral plates, the median row of ventral plates 



and the lateral spines. * x 2. 

 Devonian : West Hill flags of Naples beds, Deyo Basin, near 



Naples, N. Y. 

 The originals of this plate are in the New York State Museum 



(plastotype of figure 1). 



