vi CONTENTS. 



LETTER IX. 



Vage 



Madrepora Stellata, &C....M. Truncata...M. StelIaris...Madreporites from Steeple Ashton... 

 Madrepora Organum, &C...M. Flexuosa...M. FascicuIaris...M. Pectinata...M. Arachnoides 

 ...M. Verinicularis...Coralloidea Columnaria Pentaedra of Woodward. ..Madreporite from 

 Ingleborough...Junci Lapidei... Kilkenny Marble 47 



LETTER X. 



Mycetitae of Wood ward... Porpital and turbinated compound Madreporites... Ramose Madrepo- 

 rites.,.Milleporites...Celleporites, &c... .Fossil Corals of unknown genera 68 



LETTER XI. 



Fossil Alcyonia... Considered as Fruits, by Volkmann and Scheuchzer... Fossil Alcyonia of 

 France... Difficulties in distinguishing the Fossil Sponges from Fossil Alcyonia.. .Various 

 Specimens described 7.? 



LETTER XII. 



Fossil Alcyonium described, by Abbe Fortis... Specimens of various inedited Fossil Zoophytes 

 described..!. 106 



LETTER XIII. 



Alcyonites agreeing in their Forms; but differing in their Structure. ..Specimens of, from France, 

 Italy, Switzerland, and England. ..Wiltshire Alcyonite , 117 



LETTER XIV. 



Alcyonites inclosed in Flints... Found in Wiltshire, Oxfordshire, Buckinghamshire, and Hert- 

 fordshire... Other Specimens noticed 128 



LETTER XV. 



Maestricht Fossils... Ambiguous appearances... Compared with other Fossils, from Switzerland, 

 England, and America 134 



LETTER XVI. 



Encrinites and Pentacrinites...Trochites... History of.. .Various Species described. ..Original 

 animal Membrane demonstrated. ..Screwstone 152 



LETTER XVII. 



Lily Encrinite... Trunk. ..Pelvis. ..Superior extremity. ..Number of Bones i the superior Part 

 of the Animal... Inferior extremity 173 



LETTER XVIII. 



Reflections on the Nature and Structure of this Animal... The Animal described in various 

 states 186 



LETTER XIX. 



Cap Encrinite of Derbyshire, and perhaps of Yorkshire. ..Superior Termination. ..Supposed in- 

 ferior Termination. ..Turban Encrinite of Shropshire. ..Pelvis described. ..Inferior extremity 

 ...Peculiarity of its Trunk. ..Same Column from Gothland 191 



