FOSSIL FAUNA, 121. 



PLATE LI. 



Fossil Crinoidea, or Lily-shaped Animals. 



Fig. 1. Part of the receptacle of the "Nave Encrinite" of Mr. Parkinson {Aetinocrinus, of 

 Miller). Mountain limestone. 



Fig. 2. A portion of the receptacle of a " Rose Encrinite" (Rhodocrim/.s), viewed from the base. 



Fig. 3. The " Nave Encrinite" {Aetinocrinus triacontadaetylus, or thirty-fingered, of Miller), from 

 the mountain limestone. This is a good example of the structure of the receptacle 

 in this group of Crinoideans, which is distinguished by the arms passing off at right 

 angles from the periphery of the receptacle, like the spokes of a wheel ; whence the 

 name, Nave Encrinite. The upper part is covered by closely adapted plates, and 

 the buccal aperture or mouth is situated at the side. The stem of this group is 

 thickly beset with side-arms. (Fig. 7 is a very smalh detached one.) The arms are 

 numerous (amounting to thirty in the species figured), and of great length; these 

 subdivide into jointed filaments of extreme minuteness. Slabs of limestone are often 

 entirely covered with them, and many layers are wholly made up of their aggregated 

 remains. The plates of the receptacle are generally highly ornamented: in one 

 species the sculpturing so closely resembles that of. the Marsupites ornatm of the 

 chalk, that it was with difficulty I convinced Mr. Parkinson that the latter did not 

 possess a stem, and therefore was not an Actinocriuite.' 



Figs. 4, & 5. Portions of receptacles of Actinocrinites. 



Figs. 6, & 8. Fragments of stems of a Pentacrinite {Pentacrinus scalar is, of Goldfuss) ; from 

 Gloucestershire. 



Fig. 9. A Pentacrinite expanded on a slab of Lias-shale. Gloucestershire. 



Fig. 10. Stem, receptacle, and arms of a Crinoidean (probably a Cyathocrinite) ; it s drawn in an 

 inverted position. The figure is stated by Mr. Parkinson to be copied " from a plate 

 by Dr. Capeller." Neither the locality, nor the stratum from which it was obtained, 

 is mentioned. 



Fig. 11. Part of the stem of a Pentacrinite (P. hasaltiformis, of Miller); from the Lias. 

 Gloucestershire. 



' See Medals of Creation, p. 325; Wonders of Geology, p. 664 ; Miller's Crinoidea, p. 94. 



