PLATE 49 a. 



Fig. 1. 601. 1. Caryocrinus ornatus. (Pag. 216.) 



1 a. An individual of this species, preserving a portion of the column more than seven inches in length. 



1 6. A portion of the column enlarged, showing the edges of the joints quite smooth and flat. 



1 c, c. Views of the ends of the column, showing the articulating strisc reaching to the canal. 



1 d. A specimen having a small univalve shell attached, with its aperture setting closely down upon the 



summit, and covering the mouth of the crinoid. 

 1 e. The summit of a specimen of medium size, showing the triangular form, the arrangement of the arms, 



and position of the mouth. 

 1 /. An individual of medium size, nearly globular in form, marked by strong ridges paralU^l to and between 



the rows of pores, with intermediate strong tubercles. 



1 g. The structure of Caryocbinus when spread out, showing the bilateral arrangement of its parts as before 



described. 



Fig. 2. 602. 1. Meloceinites sculptus. ( Pag. 228.) 



2 a. View of the b.ise of this species, showing the plates .^lightly separated. 

 2 6. A figure showing the structure and relative position of the plates. 



2 c. The interior of a cup which is much elevated in the centre. 



Fig. 3. 603. 1. Heterocystites armatus. { Pag. 229.) 



3 a. Profile view of the specimen, showing the form of plates, the angular nodes, and the projection on one 



side indicating an aperture, marked o. 

 3 6. Several plates enlarged, showing the granular surface, with the strong striae at the junction of the plates. 

 3 c. The structure as far as can be ascertained from the specimen, showing position of aperture at o. 



Fig. 4, 5, 6, 7, 8. Plates of undetermiried Crinoidea. (P^g. 230.) 



4. This specimen has much the form of a pelvic plate of the preceding species, but the base is very narrow. 

 5 & G. These plates are apparently of the Lecanocrinus macropetalus, or a closely allied species. 



7. A plate of an unknown crinoid, the exposed surface of which is fiuely granulated, and the margins appa- 



rently thickened. 



8. Plate of an unknown crinoid, but probably of Dendrocrinus. 



