XVI 



LIST OF ILLUSTRATIONS. 



40. 



41. 



42. 



43- 

 44. 



45- 

 46. 



47- 



48. 

 49- 

 50. 



51- 



52. 

 53- 

 54. 

 55- 

 56. 



57. 



58. 

 59- 



60. 



61. 

 62. 



63. 



64. 



65. 

 66. 



67. 

 68. 



69. 



70. 

 71- 



72. 



73. 

 74- 

 75. 



76. 



77- 



Didymograptus divarica- 



t'us, .... 

 Diplop-aptus pristis^ 

 Phyllograptus typiis, 

 Za'phr cutis Stokesi, . 

 Strombodes peiitagomis, . 

 Colttmnana alveolata, 

 Group of Cystideans, 

 Group of Lower Silurian 



Crustaceans, 

 Ptilodictya falciformis^ 

 Ptilodktya Schafferi, 

 Group of Lower Silurian 



Brachiopods, 

 Group of Lower Silurian 



Brachiopods, 

 Miirchisonia gracilis, 

 Bcllerophon argo, 

 Maclurea crenulata, 

 Orthoceras crebriseptuni. 

 Restoration of Orthoceras, 

 Generalised section of the 



Upper Silurian rocks, 

 Monograptus priodon, 

 Halysites catemdaria and 



H. agglomerata, . 

 Group of Upper Silurian 



Star-fishes, 

 Protasier Sedgwickii, 

 Group of Upper Silurian 



Crinoids, . 

 Pla7iolites vulgaris, . 

 Group of Upper Silurian 



Trilobites, . 

 Pterygotiis Anglicus, 

 Group of Upper Silurian 



Polyzoa, 

 Spirifera hysterica, . 

 Group of Upper Silurian 



Brachiopods, 

 Group of Upper Silurian 



Brachiopods, 

 Pentamerus Knightii, 

 Cardiola interriipta, C. 



fibrosa, and Pterincea 



subfalcata, . 

 Group of Upper Silurian 



Univalves, 

 Tentaculites ornatus, 

 Pteraspis Banksii, . 

 Onchus tenuistriatus and 



Thelodus, . 

 Generalised section of the 



Devonian rocks of 



North America, 

 Psilopkyton princeps^ 



102 



78. 



79 



102 



80. 



102 



81. 



104 



82. 



104 



83. 



105 



84. 



106 



85. 





86 



107 





109 



87- 



109 







88. 



109 







89. 



no 





III 



90. 



III 



91. 



112 



92. 



113 



93- 



"3 



94 





95 



117 



96. 



119 



97- 





98 



120 







99 



121 



100 



121 



lOI 





102. 



122 





123 







103. 



124 



104. 



125 



105. 





106. 



126 





126 



107. 



127 





127 



108. 



128 



109. 





no. 





III. 



128 



112. 





113- 



129 



114. 



129 





130 





130 



"5. 





116. 



137 



117. 



138 





Pj-ototaxites Logani, 

 Stromatopora tuberculata^ 

 Cystiphyllum vesiculosum, 

 Zaphrentis corniciila, 

 Heliophyllum exiguum, 

 Crepidophyllum Archiaci, 

 Favosites Gothlandica, . 

 Favosites hemisphcerica, 

 Spij'orbis omphalodes and 



S. Arkonensis, . 

 Spirorbis laxus and S. 



spintdifera. 

 Group of Devonian Tri- 

 lobites, 

 Wing of Platephemera 



antiqua, 

 Clathropora intertexta, 

 Ceriopara Ha7niltonensis, 

 Fenestella magfiifica, 

 Retepora Phillipsi, 

 Fenestella cribrosa, 

 Spirifera sctdptilis, 

 Spirifera niucronata, 

 Atrypa retictdaris, 

 Strophomena rhomboid- 



alis, . 

 Platyceras ditmostim, 

 Cmttdaria ornata, 

 Clymenia Sedgwickii, 

 Group of Fishes from 

 the Devonian rocks of 

 North America, 

 Cephalaspis Lyellii, 

 I*terichthys cormdus, 

 Polypterus and Osteolejns, 

 Holoptychius nobilissi- 

 mus, .... 

 Generalised section of 

 the Carboniferous rocks 

 of the North of Eng- 

 land, .... 

 Odontopte}'is Schlotheiniii, 

 Calamites cannceforvns, 

 Lepidodendron Sternbergii, 

 Sigillaria Grceseri, 

 Stig maria ficoides, 

 Trigonocarpuni ovatum, 

 Microscopic section of 

 Foraminiferal limestone 

 — Carboniferous, North 

 America, . 

 Fusulina cylindrica. 

 Group of Carboniferous 



Corals, 

 Platycrinus tricontadac- 

 tylus, .... 



