250 PERMIAN FOSSILS. 



1818.— VoiGT. Practische gebirgskunde. 

 1819.— D'AuBUissoN DE VoisoNS. Traite de Geognosie, &c. 



1820. — Sternberg. Versuch einer geognostisch-botanischen Darstellung der Flora der Vorwelt; and 

 Expose Geognostico Botanique de la Flore du Monde Primitif, 



1820. — ScHLOTHEiM. Die Petrefactenkunde, &c. 



1821. — Weaver. 'On Floetz Formations ;' in the Annals of Philosophy, N.S., vol. ii. 



1821. — Miller. Natural History of the Crinoidea, 4to. {Cyathocrinus ramosus. — C. planus.) 

 1821.— J. SowERBY. Mineral Conchology of Great Britain. {Schizodus obscui'us.) 

 1822-1823. — ScHLOTHEiM. Nachtrage zur Petrefactenkunde. {Janassa hituminosa.) 

 1822.— CoNNYBEARE and Phillips. Outlines of the Geology of England and Wales, vol. i. 

 1823-1825.— J. SowERBY. Mineral Conchology of Great Britain, vol. iv. {Productus horridus, and 



Byssoarca tumida.) 

 1825. — Dr. BouE. 'Geological Distribution of the FossU Organic Remains, enumerated by Baron von 



Schlotheim ;' in Edinburgh Philosophical Journal, vol. xii. 

 1825. — KffiNiG. Icones Fossilium Sectiles. (Productus horridus.— P. Hoppi.) 

 1825. — Kruger. Urweltliche Naturgeschichte der organischen Reiche, (Productus horridus, &c.) 

 1826. — De France. Dictiounaire des Sciences Naturelles, vol. xliii. {Productus horridus.) 

 1826. — Sedgwick. On some Beds associated with the Magnesian Limestone, and on some Fossil Fish 



found in them. Proceedings of the London Geol. Soc, vol. i. 

 1826-1828. — GoLDFUss. Petrefacta Germanise. (Corals.) 



— Sedgwick. ' On the Geological Relations and Internal Structure of the Magnesian Limestone, and 



the lower portions of the New Red Sandstone Series, in their range through Nottinghamshire, 



Derbyshire, Yorkshire, and Durham, to the southern extremity of Northumberland.' Transactions 



of the Geological Society of London, 2d series, vol. iii. 

 1827. — Bronn. Zeitschrift fur Mineralogie, vol. 2. (Productus horridus.) 

 182/. — Hogg. Natural History of the Vicinity of Stockton-on-Tees. (1 Fenestella retiformis.) 

 1827, — J. SowERBY. Mineral Conchology of Great Britain, vol. vi. (Trigonotreta undulata, &c.) 

 1827. — G. B. Sowerby. Genera of Recent and Fossil Shells. (Trigonotreta undulata, &c.) 

 1828. — Sprengel. Commentatio de Psarolithes, ligni fossilis genere. Halse. 

 1828. — Phillips. Geological Observations made in the Neighbourhood of Ferrybridge in the year 1826. 



Philosophical Magazine, N.S., vol. iv. 

 1828. — Bronn. Leonhard's Min. Taschenbuch. (Cupressites TJlmanni.) 

 1828.— Fleming. History of British Animals, &c. 

 1828.— Ad. Brongniart. Prodrome d'une Histoire Naturelle des Vegetaux Fossiles; and Histoire des 



Vegetaux Fossiles. (Algce.) 

 1829.— Alex. Brongniart. Tableau des Terrains qui composent I'ecorce du Globe. 

 1829— HjENINGHAUS. Verzeichniss der Von F. W. Haeninghaus in Crefeld dem Museum der Universitat 



Bonn (zur Beforderung grossern Nutzens in dem Naturwissenschaften) iiberlassenen Petrefacten 



Sammlung, p. 18. 

 829. — Uee. New System of Geology. (Protorosaurus Speneri.) 

 929. — MiJNSTER. Petrefacta Germanite. (Bivalves.) 

 1^,3' -1833. — De la Beche. Geological Manual. 

 i83i,. — Sedgwick. 'On the Deposits overlying the Carboniferous Series in the Valley of the Eden, and 



on the North-western Coasts of Cumberland and Lancashire,' published in vol. i. of the 



Proceedings, and vol. iv of the Transactions of the Geological Society of London. (Catamites.) 

 1832. — Cotta. Die Dendrolithen in Beziehung auf ihren Bau. Dresden. 

 1832. — Von Meyer. Palseologica. (Protorosaurus Speneri.) 

 1832. — Von Dechen. De la Beche, Handbuch der Geognosie. 



