Abdominal aorta and branches, 212 Abdominal ribs, 80 Acetabulum, 85 Air chamber of egg, 228 Albumen of egg, 229, 230 Allantois, 299, 300, 328 Alligator, 6 abundance of, 8 American, 3 and cane rat, 28 and muskrat, 28 attack from, 14 bellowing of, 18 catching of, 34 cave of, 12 Chinese, 38 Cynocephalus, 110 daylight hunting of, 33 dealers in, 34 derivation of name of, 40 differs from crocodile, 7 digging from cave, 33 distribution of, 10 economic importance of, 26 eggs used as food, 35 feeding of, 12 fire hunting of, 32 habitat of, 8 hatching of, for sale, 35 hibernation of, 12, 13 hides, annual output of, 28 for card cases, etc., 30 chief centers for, 27 damaged in removal, 31 Floridian, 28, 29 highest priced, 32 length and width of, 30 from Louisiana, 28, 29, 30 methods of cutting, 31 Mexican, 29, 30 removal of, 31 salting of, 31 shipment of, 31 from South and Central America, 27, 28 from Southern States, 28 varieties of, 29 value of different sizes of, 28, 29 value to hunter of, 28 hole, 11 hunting, 32 Joe, 9 killing of, 33 for sport, 27 laws for protection of, 28 leather, first used, 26 for shoes, 27 imitation, 32 present use of, 32 meat, preparation of, 35 smoking of, 36 use as food, 35 mississippiensis, 3, 7 raw hides, selling of, 32 sale of live, 34 sinensis, 3, 16 the stuffing of, 34 swimming of, 13, 14 tanned hides, sale of, 32 teeth, sale of, 34 value of, 34 trail, 11, 13 unknown to ancients, 40 use of tail, 14 value of live, 34 Alligatoridæ, 1 Amnion, 236, 247, 251, 259, 266, 267, 268, 269, 270, 274, 275, 278, 290, 334 Ampullæ, 149 Ancestry, 4 Annulus tympanicus, 149 Aortic arches, 203, 296, 299 Appendages, development of, 308, 315, 317, 327, 328 Appendicular skeleton, 81 Area opaca, 233 Area pellucida, 233 Arkansas Alligator Farm, 201 Arterial system, 212 first reference to, 44