224 NEW YORK STATE MUSEUM 



PLATE 10 



(All originals in state museum unless otherwise stated) 



Lepido discus alleganius sp. nov. 



p. 194 



Fig. 



1 A young individual, oral aspect. The rays are direct or but 



slightly undulating, reach the margin and terminate there 

 if not extending somewhat on to the lower surface of the 

 test. The structure of the rave and mouth is lost, but the 

 former are seen to lie in well denned grooves, x 1J 

 Chemung sandstones. Loose at Alfred N'. Y. 



2 The aboral aspect of a large individual, showing the depressed 



surface of imbricating plates directed centrifugally and the 

 projecting margin of coarser plates. Normal size 

 Chemung sandstones. Loose at Belvidere N. Y. 



3 Oral aspect of a mature individual, showing the extremely 



narrow undulating whiplash rays, all solar; the elongate 

 oral aperture and mode of divergence of the rays therefrom; 

 the fine interlocking line of the cover plates. Also the 

 position of the anal pyramid and the absence of specially 

 differentiated marginal plates, x 1J 

 Chemung sandstone. 2 miles north of Sabinsville, Tioga 

 co. Pa. 



4 Oral aspect of another adult, showing similar characters, some 



of them more pronounced. Here the anal pyramid shows 

 its composition of 10 triangular plates, x 1J 

 Ohemung sandstones. Loose at Alfred N. Y. 



5 Aboral aspect of a large individual 

 Ohemung sandstones. Loose at Belvidere N. Y. 



Agelacrinites hamiltonensis Vanuxem 

 p. 184 



6 A drawing made from a gutta-percha replica of the original. 



This replica, on comparison with Vanuxem's figure in the 

 report on the geology of the third district, is seen to lack 

 parte of two individuals, but it shows the detailed structure 



