Part 5

15. Head of Osteolepis, seen in profile 80

16. Cranial buckler of Diplopterus 81

17. Ditto 82

18. Palatal dart-head, and group of palatal teeth, of Dipterus 83

19. Cranial buckler of Dipterus 85

20. Base of cranium of Dipterus 86

21. Under jaw of Dipterus 87

22. Longitudinal section of head of Dipterus 88

23. Section of vertebral centrum of Thornback 92

24. Dermal tubercles of Asterolepis 95

25. Scales of Asterolepis 96

26. Portion of carved surface of scale 96

27. Cranial buckler of Asterolepis 98

28. Inner surface of cranial buckler of Asterolepis 99

29. Plates of cranial buckler of Asterolepis 102

30. Portion of under jaw of Asterolepis 103

31. Inner side of portion of under jaw of Asterolepis 104

32. Portion of transverse section of reptile tooth of Asterolepis 105

33. Section of jaw of Asterolepis 106

34. Maxillary bone? 108

35. Inner surface of operculum of Asterolepis 109

36. Hyoid plate 110

37. Nail-like bone of hyoid plate 111

38. Shoulder plate of Asterolepis 112

39. Dermal bones of Asterolepis 113

40. Internal bones of Asterolepis 114

41. Ditto 115

42. Ischium of Asterolepis 116