CHAPTER IX

THE DEVELOPMENT OF THE ALLIGATOR 226

BIBLIOGRAPHY 343

INDEX 349

ILLUSTRATIONS

PAGE

ALLIGATOR MISSISSIPPIENSIS. (In color.) Frontispiece

FIGURE

A. SKULL OF BELODON 5

1. MAP SHOWING THE PRESENT DISTRIBUTION OF CROCODILIA 6

2. HEADS OF AMERICAN ALLIGATOR AND CROCODILE Facing 7

3. ALLIGATOR JOE IN THE EVERGLADES Facing 10

4. ALLIGATOR HUNTER IN THE OKEFINOKEE Facing 10

5. NEST OF C. POROSUS Facing 21

6. JACKSON SLOUGH Facing 21

7. A TYPICAL ALLIGATOR HOLE Facing 23

8. ALLIGATOR NEST, MADE CHIEFLY OF GRASS Facing 25

9. ALLIGATOR NEST, MADE CHIEFLY OF FLAGS Facing 27

10. TWO SPECIES OF CAIMAN: BROAD-NOSED CAIMAN, SPECTACLED CAIMAN Facing 35

11. TWO AFRICAN CROCODILES: NILE CROCODILE, WEST AFRICAN CROCODILE Facing 39

12. SALT WATER CROCODILE Facing 41

13. SKULL OF GAVIAL, VENTRAL VIEW Facing 43

14. SKULL OF GAVIAL, LATERAL VIEW Facing 43

15. ALLIGATOR SKINS Facing 46

16. ENTIRE SKELETON OF CROCODILE 50

17. FIRST FOUR CERVICAL VERTEBRÆ OF CROCODILE 52

18. THORACIC AND SACRAL VERTEBRÆ OF CROCODILE 55

19. DORSAL VIEW OF SKULL OF ALLIGATOR Facing 60

20. VENTRAL VIEW OF SKULL OF ALLIGATOR Facing 63

20A. LONGITUDINAL SECTION OF TOOTH OF CROCODILE Facing 66

21. LATERAL VIEW OF SKULL OF ALLIGATOR 69

22. POSTERIOR VIEW OF SKULL OF ALLIGATOR Facing 70

23. SAGITTAL SECTION OF THE SKULL OF ALLIGATOR 71

24. DORSAL VIEW OF LOWER JAW OF ALLIGATOR Facing 74

25. THE HYOID APPARATUS 77

26. THE STERNUM AND THE ASSOCIATED MEMBRANE BONES 79

27. THE PECTORAL GIRDLE AND ANTERIOR LIMB 82

28. THE PELVIS AND SACRUM 85

29. THE POSTERIOR LIMB 87

I. PLATE I. THE SHOULDER MUSCLES Following 130

II. PLATE II. THE MUSCLES OF THE ANTERIOR REGION Following 130

III. PLATE III. THE MUSCLES OF THE POSTERIOR REGION Following 130

IV. PLATE IV. THE MUSCLES OF THE POSTERIOR REGION Following 130

V. PLATE V. THE MUSCLES OF THE POSTERIOR REGION Following 130

30. THE BRAIN OF THE ALLIGATOR Facing 132

31. THE BRACHIAL PLEXUS OF C. ACUTUS 140

32. THE CRURAL PLEXUS OF A. MISSISSIPPIENSIS 142

33. INTERIOR OF THE MOUTH OF THE ALLIGATOR Facing 151

34. THE DIGESTIVE SYSTEM OF THE ALLIGATOR 152

35. OUTLINE OF THE DIGESTIVE TRACT OF THE ALLIGATOR 158

36. COVERING OF THE ANTERIOR REGION OF THE TONGUE 160

37. COVERING OF THE POSTERIOR REGION OF THE TONGUE 161

38. GLAND FROM THE POSTERIOR REGION OF THE TONGUE 162

39. GLAND FROM THE POSTERIOR REGION OF THE TONGUE 164

40. COVERING OF THE ROOF OF THE MOUTH 166

41. TRANSSECTION OF THE ANTERIOR REGION OF THE ŒSOPHAGUS 169

42. TRANSSECTION OF THE POSTERIOR REGION OF THE ŒSOPHAGUS 170

43. EPITHELIUM OF ANTERIOR REGION OF ŒSOPHAGUS 172

44. EPITHELIUM OF ANTERIOR REGION OF ŒSOPHAGUS 173

45. TRANSSECTION OF WALL OF PYLORIC STOMACH 176

46. GLANDS OF FUNDUS OF STOMACH 177

47. TRANSSECTION OF WALL OF ANTERIOR REGION OF SMALL INTESTINE 181

48. TRANSSECTION OF WALL OF MIDDLE REGION OF SMALL INTESTINE 182

49. TRANSSECTION OF WALL OF POSTERIOR REGION OF SMALL INTESTINE 183

50. MUCOSA OF THE ANTERIOR REGION OF SMALL INTESTINE 184

51. TRANSSECTION OF THE WALL OF THE MIDDLE REGION OF THE SMALL INTESTINE 185

52. TRANSSECTION OF THE WALL OF THE ANTERIOR REGION OF THE RECTUM 186

53. EPITHELIUM OF THE ANTERIOR REGION OF THE RECTUM 187

54. FEMALE UROGENITAL SYSTEM OF ALLIGATOR 193

55. MALE UROGENITAL SYSTEM OF ALLIGATOR Facing 195

56. MALE ORGAN OF ALLIGATOR Facing 195

57. RESPIRATORY ORGANS OF ALLIGATOR 198

58. HEART OF ALLIGATOR Facing 202

59. VEINS OF THE POSTERIOR REGION OF ALLIGATOR 204

60. VEINS OF THE ANTERIOR REGION OF THE ALLIGATOR 209

61. ARTERIES OF THE POSTERIOR REGION OF THE ALLIGATOR 213

62. ARTERIES OF THE ANTERIOR REGION OF THE ALLIGATOR 215

VI.-XXVIII. PLATES VI TO XXVIII. A SERIES OF FIGURES TO ILLUSTRATE THE DEVELOPMENT OF THE AMERICAN ALLIGATOR Following 342

THE ALLIGATOR AND ITS ALLIES