Cuculiformes, _42_ Cuneiform bones, 27; dog, 414 f. _Cyclodus_, _38_; see _Tiliqua_ Cycloid scales, 8, 60, 105; cod, 83 _Cyclopidius_, _45_; skull, 468 Cyclospondyli, 114 Cyclostomata, _31_; general characters, 53 _Cycloturus_, _44_; hallux, 522; manus, 505 _Cygnus_, _41_; see Swan _Cynocephalus_, _49_; cervical vertebrae, 446; skull, 482 Cynoidea, _48_, _369_; dental formula, 437 _Cynognathus_, _36_; occipital condyle, 277; teeth, 273 Cyprinidae, _33_ _Cyprinus_, _33_; see Carp Cypseli, _42_ Cypselidae, _42_; see Swifts Cystignathidae, _36_ _Dactylopterus_, _34_; pectoral fins, 131 Dasypodidae, _44_ _Dasyprocta_, _48_; auditory ossicles, 488; thoraco-lumbar vertebrae, 450 Dasyproctidae, _48_ _Dasypus_, _44_; manus, 505; skull, 459; stapes, 487; teeth, 424 Dasyuridae, _43_, _350_; dentition, 423; pes, 521; skull, 456 Deer, _359_; manus, 507; pes, 523; Chinese water --, _46_, see _Hydropotes_; Musk --, _46_, see _Moschus_; Red -- fibula, 519 Delphinidae, _45_ _Delphinus_, _45_, 357; lumbar vertebrae, 448; skull, 462 f. Deltoid ridge, crocodile, 263; dog, 406; frog, 164 _Dendrohyrax_, 363 Dental formula, regular, 344, 422; Anthropoidea, 441; _Astrapotherium_, 432; _Babirussa_, 428; Camel, 428; _Chiromys_, 441; Chiroptera (many), 440; Cynoidea, 437; _Dinotherium_, 434; Dog, 376; Duplicidentata, 435; _Elephas_, 434; _Erinaceus_, 440; _Felis_, 437; _Galeopithecus_, 440; _Hippopotamus_, 427; Horse, 430; _Hydromys_, 436; Hyracoidea, 362; Macropodidae, 423; _Manatus_, 425; _Notoryctes_, 423; _Otaria_, 439; _Procavia_, 432; _Pteropus_, 441; Rodentia (most), 435; Ruminantia, 429; _Squalodon_, 427; _Sus_, 428; Tapiridae, 429; _Thylacinus_, 423; _Uintatherium_, 433; _Ursus_, 439; _Zeuglodon_, 426 Dentary, 22; crocodile, 258; cod, 100; duck, 320; frog, 161; newt, 144; salmon, 94; turtle, 230 Dentine, 5 Derbian Screamer, spurs, 330 Dermal exoskeleton, crocodile, 237; fish, 105; mammals, 419; reptiles, 271; turtle, 215 Dermo-supra-occipital, Labyrinthodontia, 177; _Polypterus_, 122 Dermochelydidae, _37_ _Dermochelys_, _37_, _194_, 214, 270; carapace and plastron, 272 Dermoptera, _48_; general characters, 370 Derotremata, _35_ _Desmodus_, _49_; teeth, 441 Desmognathous, 319, 335 Development of bone, 10; of cranium, 16; of teeth, 7