PLATE 78. 
1. 340. 1. Glyptocrinus decadactylus. (Pag. 281.) 
1 a. A figure of a specimen, preserving a small portion of the column and the entire length of the fingers. 
1 b. Fragments of columns, composed of alternating large and smaller discs with angular edges. 
1 c. Section of the same. 
1 cl. Section and figure of a similar fragment of a column enclosed in a coral. 
1 e. Fragment and section of a column where the discs are excavated on their upper side, and have plain 
rounded edges with a pentapetalous impression on the extremities. 
1 f. Fragment of similar character, having the upper edges of the plates fimbriated. 
1 g. Section of the same enlarged. 1 h. Magnified portion, showing the fimbriated edges of the discs. 
1 i. Separate plates or discs of a similar column, showing the variable character of the marginal crenulations, 
one specimen being marked by six prominent angles. 
1 k. Two figures, showing the proportionate size of the larger and smaller discs in the columns, composed of 
plain alternating joints. 
1 n. Fragment of a column, with the edges of the discs rounded and slightly nodulose : intermediate plates 
thin. 
1 o. Edges of the discs rounded and nodulose ; intermediate ones thin, nodulose. 
1 p. Edges of the discs rounded and smooth, the intermediate ones thin. 
1 r. Edges of the discs fiat and broad, the intermediate ones thin. 
1 s. A fragment of slate with moniliform columns ; the intermediate plates often being scarcely distinct, while 
in others they are half as thick as the larger ones. 
1 t. Large fragments of columns in the compact slaty rocks of the Hudson-river group, with the discs thick, 
the intermediate ones being scarcely visible. 
1 u. A similar fragment of*a column, with a section of the end, showing identity with the preceding figures. 
2. 129. 1. Tentaculites flexuosa. (Pag'- 284.) 
2 a. Fragment of stone with several specimens a, a, a, associated with corals, shells, etc. 
2 b. A specimen enlarged, showing the longitudinal striae. 
