PLATE A 41. 
Fig. 1. 
576. 1 . Caryocrinus ornatus. 
(Pag. 182.) 
Fig. 2. 
572. 1. Closteeocrinus elongates. 
(Pag. 179.) 
2 a. The specimen natural size. 
2 b. The structure of the calyx enlarged, showing one side with column below. 
2 c, d, e, f. Portions of the columns and sections, natural size and magnified. 
Fig. 3. 
573. 2. Glyptocrinus plumosus. 
(Pag. 180.) 
3 a. A portion of a single finger, with the tentacula attached. 
3 b. Two joints of the finger enlarged, with several of the tentacular joints attached. 
3 c. A fragment of the column, probably of the same species. 
3 d. A few joints of the same enlarged, showing the longitudinal line of separation between the five parts of 
the plate. 
3 e. The end of the same column enlarged. 
3 f. A small fragment of the rock, with the surface nearly covered with the joints of this crinoid. 
3 g. Several of these joints enlarged, showing their variable character. 
Fig. 4. 574. 3. Glyptocrinus-. (Pag. 181.) 
Fig. 5. 575. 1. Ichthyocrinus? clintonensis. (Pag. 181.) 
Fig. 6. Undetermined species. (Pag. 181.) 
6 a. The specimen of the natural size. 6 b. The tentacula enlarged. 6 c. Section of the same. 
Fig. 7. Joints of undetermined Crinoidea. (Pag. 182.) 
7 a. One of these rings, presenting a smooth globular surface, with a smooth opening in the centre. The 
thickness of this one is nearly a quarter of an inch. 
7 b. The impression left in the iron ore by a larger individual, the thickness of which was more than a quar¬ 
ter of an inch. 
7 c. A very thick one, with a small opening in the centre. 
7 d. A small specimen of the same character. 7 e. View of the edge of a very thin specimen. 
Fig. 8. 577. 2. Tentaculites minutus. (Pag. 183.) 
8 a. A small fragment of the green shale, preserving several specimens of this fossil. 
8 b. Two specimens drawn separate from the shale, of the natural size. 
8 c. An individual enlarged. 
8 d, e. Portions of two individuals still farther magnified, showing in one an apparent crenulation of the rings. 
Fig. 9. 578. 3. Tentaculites distans. (Pag. 184.) 
9 a. An individual of the natural size. 9 b. A portion of the same enlarged. 
