ILLUSTRATIONS. 
PLATE I.—Cambrian and Silurian fossils. = 
II.—Devonian fossils. 
III.—Devonian fossils. 
1V.—Devonian fossils. 
V.—Devonian fossils. 
ViI.—Devonian fossils. 
VII.— Carboniferous fossils. 
VIII.—Carboniferous fossils. 
IX.—Cambrian fossils. 
X.—Campbrian fossils. 
XI.—Siuurian fossils. 
XII.—Silurian fossils. 
XIII.—Devonian fossils. 
XIV.—Devonian fossils. 
XV.—Devonian fossils. 
XVI.—Devonian fossils. 
XVII.—Devonian fossils. 
XVIII.—Carboniferous fossils. 
XIX.—Carboniferous fossils. 
XX.—Carboniferous fossils. 
XXI.—Outline figures of Olenellus and Lingula. 
XXII.—Carboniferous fossils. 
XXIII.—Carboniferous fossils. 
XXIV.—Carboniferous fossils. 
PRE cen le CRORS-St CHLOMLON Ont RO COURSE acme iain aoe ele earl omnia oleae eee ee lee aime aii aioe 
2.—Cross-section of Orthoceras .........-..---.---------.---- S80505 cosS S056 Bsepsn Gscess 
Si SECUON OL -DELlerOphOn MaAjUSCULUB) <<< = oman wmlewie mani ee noes anise alsciviee d= eccccewss aie 
4—Onthne-ficure of Ampullaria ?’ Powelli ....---= .-=-c-cs-ses escc se - scene fone e oe seen =- 
ea CO PERC UMUMILOLEA TDL tO aie EF OWELUD cin nar = = remain emia slo eerie a mlminl om ohn ie misisin ie dae ee 
G-—OvTiIME cue One MYSie UI ECH 3 cce clin makin teintetentele alate eile lolleara = oier alas mos, =iniclol ete 1a = eis 
7.— Outline figure of Zaptychius carbonadiia@ .-2--- 22-22. nnn cae ae none e wee e ee eceaes aeace 
