LIST OF ILUSTRATIONS 



mates 



I. — Cacldcrini. Individual sptvinuMis. 

 TI. — Cuctocritii, Details of plates. 

 III. — Cactocrmi, DetaiLs of plates. v 



IV. — Cactncrini, Details of plates. 

 V. — Cactocriiii. I><>tails of plates. 

 VT. — Lainiiuitod Clirysotile-Asbestos from Thedford, Canada. 

 \' I !.— Map showing the Distribution of Clinton Hematites in the Unitefl 

 States. 

 VIII.— Fossil Ore. 

 IX. — Fossil Ore — Photomicrographs. 

 X.— Oolitic Ore. 

 XI. — Cavernous Consolidation. 

 XII. — Special Consolidations. 

 XIII. — Special Consolidations. 

 XIV. — Partial Impregnation. 

 XV. — Cherty Limestone Seams. 

 XVI. — Fossil Ore — Photomicroiri'aplis. 

 XVI I. — Contact Specimens. 

 XVI 1 1. —Mud Cracks. 

 XIX. — Contact Specimens. 

 XX. — Contact Specimens. 

 XXI. — Oolitic Ore — I'hotomici'ographs. 



XXII. — Sections of i;inliryos ix'forc and after Segmentation. 

 XXIII. — Sections of Embryos with Two and Three Somites. 

 XXIV. — Transverse Section, Embryo of Four Somites. 

 XXV. — Transverse Section. Embryo of J\mr Somites. 

 XXVI. — Transverse Section, lOmbryo of Four Somites. 



XXVII. — Reconstruction of Neuraxis of Embryos of Four and Eight 

 Somites. 

 XXVIII. — Transverse Section, Embryo of Eight Somites. 

 XXIX.— Transverse Section. Embryo of Eight Somites. 

 XXX. — Transverse Section. Embryo of Eight Somites. 

 XXXI. — Reconstruction of Neuraxis of Embryo of Nine Somites. 

 XXXII. — Reconstruction of Neiu-axis of Embryo of Ten Somites. 

 XXXIII. — Reconstruction of Neuraxis of Embryo of Twelve Somites. 

 XXIV. — Reconstruction of Neuraxis of Embryo of Fourteen Somites. 

 XXXV. — Reconstruction of Neuraxis of Eml)ryo of Sixteen Somites. 

 XXXVI. — Reconstruction of Neuraxis of Embryo of Seventeen Somites. 

 XXX VT I. — Reconstruction of Neuraxis of Embryo of Nineteen Somites. 

 XXXVIII. — Reconstruction of Neuraxis of Embryo of Twenty-one Somites. 

 XXXIX. — Reconstruction of Portions of Neuraxis of Embryos of Eight and 

 Nine Somites. 

 XL. — Reconstruction of Portions of Neuraxis of Erabi'yos of Twelve 



and Twenty-one Somites. 

 XLI. — Transverse Section of Emltiyo of Sixteen Somite.s. 



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