Fig. 5. Portion of the column partly covered with a cortical covering of a purple colour possibly the original investing membrane. Fig. 6. A receptacle, in which a few of the ossicula of the arms remain attached to the margin. Fig. 7. Another receptacle, in which the plates called by Mr. Parkinson "clavicles and scapulæ," are retained in their natural positions. Fig. 8. A receptacle, in which the principal plates are well defined: these are named by Mr. Parkinson as follow: _a_, clavicle; _b_, scapula; _c_, ossicula of the arms; _d_, the last series of the same. The ossicles forming the elongated tentacula, Mr. P. termed "_bones of the fingers_." Fig. 9. Portion of an encrinital stem with digitated processes: the nature of this fossil is unknown to me. Fig. 10. Three united ossicula of a Pentacrinite with depressions for side-arms: from the Lias of Lyme Regis. Fig. 11. A distorted pentacrinal ossicle; said to be from Africa. Figs. 12, & 14, are vertical polished sections of the peduncle, or base of the stem, of the Bradford Encrinite. Fig. 13. Vertical section of the peduncle of a Pentacrinite from Soissons. Fig. 15. A polished slab of pentacrinal marble from Charmouth, Dorsetshire. Fig. 16. Variously contorted pentacrinal stems with numerous side-arms, from Charmouth. [Illustration: Plate LI.] PLATE LI. Fossil Crinoidea, or Lily-shaped Animals. Fig. 1. Part of the receptacle of the "_Nave Encrinite_" of Mr. Parkinson (_Actinocrinus_, of Miller). Mountain limestone. Fig. 2. A portion of the receptacle of a "_Rose Encrinite_" (_Rhodocrinus_), viewed from the base.