261 



LIST OE WOODCUTS. 



Fig. page 



1. Walking leg of Decapod G 



2. Jaw-foot of Pterygotus 6 



3. Pterygotus problematicus 24 



4. ,, anglicus (restored) 27 



5. „ „ sectiou of anterior 

 part of the body 41 



6. Pterygotus anglicus, section of posterior 



part of the body 42 



7. Section of the Upper Silurian and other 



strata near Lesmahagow 51 



8. Head of Pterygotus bilobus, underside ... 56 

 8 a . Portion of eye, magnified 56 



9. Ornament on Pterygotus bilobus 57 



10. Organs detached from head of Pt. bilobus 58 



11. Endognath of Pterygotus bilobus 59 



12. Operculum of Pt. bilobus, var. a 61 



13. Thoracic plate of Pt. bilobus, var. S 69 



14. Pterygotus taurinus 75 



15. Ectognath of Pterygotus ludensis 78 



16. Endognath of Pterygotus ludensis 78 



17. Head of Pt. gigas 81 



18. Metastoma of Pterygotus 84 



19. ,, „ Pt. problematicus 84 



20. Thoracic plate of Pt. problematicus 88 



21. Endognath of Pterygotus arcuatus 89 



22. „ „ „ 8!) 



23. Metastoma of Pterygotus arcuatus 90 



24. Head of Pterygotus stylops 91 



25 — 27. Crustacean appendages, doubtful ... 91 



28. Section at Church Hill, Leintwardine ... 94 



29. Section at railway tunnel, Ledbury 100 



30. Plica?, greatly magnified (Slimonia acumi- 



nata) 108 



31. Antenna of Slimonia acuminata 109 



32. Endognathary palpus of Slimonia 112 



Fig. page 



33. Largest lip-plate of Slimonia acuminata... 113 



34. Operculum of Limulus polyphemus 115 



35 . Operculum of Slimonia acuminata 116 



36. „ ,, inner side 117 



37. „ „ 117 



38. „ ,, acuminata 118 



39. Stylonurus Logani 131 



40. Eurypterus remipes .'. 132 



41. Head of Eurypterus Scouleri 135 



42. Body-rings of Eurypterus Scouleri 137 



43. Eurypterus Scouleri 139 



44. „ lanceolatus 142 



45. „ Hibernicus, body segment ... 150 



46. „ „ endognath of 150 



47,48. Chela of Crustacean 150 



49. Median appendage 154 



50. Lip-plate of Eurypterus punctatus 155 



51. Endognathary palpus of Eurypterus punc- 



tatus 157 



52. Eurypterus obesus 160 



53. ,, Brodiei 162 



54. „ mammatus 164 



55. Arthropleura armata 166 



56. Phytolithus parmatus 168 



57. Hippurites gigantea 169 



58. Catamites varians 169 



59. Equisetites infundibuliformis 170 



60. „ „ 170 



61. ,, „ foliage of ... 170 



62. Euphoberia 1 major 172 



63. Arthropleura ferox 172 



64. Hemiaspis limuloides 177 



65. Pseudoniscus aculeatus 177 



66. Exapinurus Schrenkii 177 



67. Bunodes lunula 177 



36 



