PLATE 44. 



Fig. 1. 589. 1. Lyriocrinus dactylcs. ( Pa<r. 197.) 



1 a. An individual of medium size, preserving the cup and the arms nearly to the extremities. 



1 6. A smaller specimen, preserving a portion of the column, and leaving four of the arms only visible. 



1 c. A larger specimen, showing the arms and column well preserved. 



1 c f. Section of the column. 



1 d. The structure as made out from the specimen fig. 1 a. The commenccmont of three pairs of fingers is 

 shown, and the simple joints at the base of th(; other pairs in the same relative position. 



1 e. A single plate enlarged, showing the character of the surface, and the increased ornament at the mar- 

 gins or junction with adjoining plates. 



1 /. A fragment of a column enlarged, showing more distinctly the alternating larger and smaller joints. 



1 g. The end of the column enlarged. 



Fig. 2. 591. 2. Lecanocrinus ornatus. (Pag. 201.) 



2 6. A small specimen of this species. 



2 a. A larger individual, showing the same form as the preceding 



2 c. Base of the anchylosed pelvic plates, with a single joint attached. 



2 d. The interior of the same. 



2 e. The same enlarged, showing more distinctly the triangular cup and sutures of the plate. 



2 f. Lateral view of the same specimen. 



2 g. The plates separated, showing the structure of the crinoid as far as the first divisions of the arms. 



2 h, i. A costal and arm-joint enlarged, showing the character of the surface markings. 



2 fc. A fragment of a column, composed of irregularly alternating thicker and thinnner plates, which are 



also interrupted, or not continuous laterally, each joint being often composed of several pieces over- 



lajjping each other. 



2 /, m. The end view of this fragment, and the same enlarged, showing form of canal and cremilations of the 



surface. 



Fig. 3, 4, 5, 6, 7, 8, 9. Columns of undetermined Crinoidea, (Pag. 230.) 



3 a, 6. A fragment of a column, of the natural size, with section of the same. 



8 c, d. Enlargements of the same. 



4 a. A fragment coiled upon the surface of a peice of shale. 

 4 6. A small portion of the same enlarged. 



b a,b. A fragment of a column where the joints are tliin, the edges of the wider ones being slightly crenu- 

 lated, having two or more thin joints between. 



6 a, b, c. Columns composed of smooth ccpial joints, having lateral branches or side arms. 



7 a. A fragment of the base of a column where it diverges into the radicles. 



7 b, c. The articulating surface, natural size and enlarged, showing the strong somewhat dichotomous strisc. 

 8. A fragment of a column with the radicles attached. 



9 a, b, c. The base of another species, with the radicles attached. 



