CONTENTS. vii 
LETTER XX. 
Pear Encrinite of Bradford... .Superior extremity, inferior extremity....Found also at Pfeffingen* • 208 
LETTER XXL 
Nave Encrinite, discovered in Yorkshire, by Mr. Martin Lister...In Gloucestershire, by Mr. 
John Beaumont...Supposed to be the Radix of an Encrinus...Shewn to be the Pelvis, or 
Skeleton, of the Body part... Similar Fossils described... Others from the Isle of Gothland... 
Encrinite in Mr. Donovan’s Collection 217 
LETTER XXII. 
The Tortoise Encrinite.. .The Straight Encrinite... The Bottle Encrinite.. .The Clove Encrinite 
...Kentucky Asterial Fossil... Uncommon Encrinal Vertebrae.. .Fossil, apparently an oval 
Encrinite 225 
LETTER XXIII. 
Pentacrinites.. .Different Vertebrae noticed 241 
LETTER XXIV. 
Briaraean Pentacrinite...Vertebral Column...Vertebral Processes... Two-fold Office...Bones forming 
the Pelvis. ..Superior Extremities... Anastomosing Pentacrinite •••• •••••• ...... ...... .... 248 
LETTER XXV. 
Remains of the Gloucestershire, Somersetshire, and Yorkshire Pentacrinites ••«... .... ...... 257 
LETTER XXVI. 
Opinions and Discoveries respecting the living Analogues of the Pentacrinites 263 
LETTER XXVII. 
Attempt to ascertain the Number of Species of these Animals 272 
LETTER XXVIII. 
General Remarks on the Fossils already described 278 
LETTER XXIX. 
Observations on the Process of Petrification 
283 
