858 



Snl)ject Index 



Teat(s), 577 



supernumerary, 580 

 Tectospinal tract, 170 

 Tectum, 148 

 Teeth, 35-56, 137, 222, 756 



adaptations of, 53 



of amphibians, 52, 53, 55 



ankylosed, 46, 47 



cheek-, 46 



comparative morphology of, 44-56 



crown of, 35, 36 



dead, 38 



decay of, 36, 38 



deciduous (milk), 39, 40, 42, 43, 49, 54 



determination of shape, 44 



development of, 39-44, 49 



diagram of structure, 37 



differentiation of, 52, 53 



distribution of, 52 



eruption of, 42, 44 



of fishes, 50-53, 55 



horny, 56 



of mammals, 634-636 



of man, 36, 38, 39, 40, 42, 43, 45 



milk (deciduous), 39, 40, 42, 43, 49, 54 



neck of, 35, 36 



number of, 52, 635 



permanent, 39, 40, 42, 43, 49, 54 



replacement of, 50, 53-55, 635 



of reptiles, 52, 53, 55 



root of, 35, 36 



sensitivity of, 38 



size of, 52 



sockets of (alveoli), 35, 37, 39, 42 



structure of, 35-39 

 Tegmentum, 148 

 Tela chorioidea, 146, 147, 151 

 Telencephalon, 6, 144, 145, 147, 148, 19S, 



479, 703, 704 

 Teleost(ei), 29, 57, 72, 90, 233, 426, 432- 

 434, 435, 436 (see also Fishes, 

 bony) 

 Teleostomi, 421 

 Telodendron, 140 

 Temperature and body size, 560 



regulation, 184 

 Temporal arcade, 600 



bone, 122, 692 



lobe, 177, 706 



space, 602 

 Temporalis muscles, 92, 601 

 Tendon(s), 95, 195, 212, 321 

 Tendon-spindles, 212 

 Tensor tympani muscles, 98, 696 



vaginae femoris muscles, 92 

 Tentorium cerebelli, 192 

 Terminal ganglions, 179, 182, 183, 185 

 Terns, 546, 556 

 Terrapin, 496 



Terrestrial vertebrates, oral glands of, 636 

 Tertiary, 793 



Testis(es), 79, 80, 88, 231, 232, 233, 237, 

 282, 650-656 



descent of, 653 



position of, 651 



Tetany, 222 



Tetrapod(a), 94, 95, 120, 129, 130, 131, 



133, 410 

 Thalamus(i), 145, 146, 202, 536, 710 

 Thalassochelys, 493 

 Thecodont, 47, 48, 52 

 Theory (see also Law, Principle) 



of archetypes, 340 



concrescence (teeth), 53 



differentiation (teeth), 53 



of evolution (see Evolution) 



Gastraea, 297, 392 



genetic continuity, 340 



Goethe-Oken, 112, 344, 377 



mutation, 352, 365 



of natural selection, 345, 366 



transcendentalism, 340 



unity of plan, 340, 343 

 Therapsida, 501, 564, 629 

 Theria, 729 



Thermo-regulators, 155 

 Theromorpha, 501, 564, 566 

 Theropsida, 629 

 Thigh, 94 (see also Femur) 

 Thinking, 479, 481 (see also Intelligence) 

 Thoracic, 584 



arch, 586 



cavity, 22 



curvature, 4, 109 



duct, 66 



ganglions, 185 



muscles, 591, 594 



nerves, 177 



vertebrae, 4, 109, 596 

 Thoracolumbar system, 187-190 (see also 



Autonomic system) 

 Throat, 99 

 Thrush(es), 526, 553 

 Thumb, opposable, 804 

 Thylacinus, 732, 733 

 Thymus, 215, 220, 222, 223, 276 

 Thyroarytenoid muscle, 614 

 Thyrohyoid muscle, 99 

 Thyroid cartilage, 61, 612 



gland, 215, 220, 221, 222, 445 

 Thyroxin, 221, 222 

 Tibia, 107, 131, 512 

 Tibio-tarsus, 512 

 Tiger, 747, 749 

 Tinamiformes, 544 

 Tinamou, 542, 544, 554 

 Tinamus, 544 

 Tissue(s), 301, 302 



adipose, 327, 328 



areolar, 321 



connective, 191, 193, 221, 224, 278, 284, 

 285, 320-322 

 fibrous, 117 

 subcutaneous, 18, 100, 581 



epithelial, 303-310 



epithelioid, 303 



follicular, 645 



lymphoid, 633 



for mechanical support, 320-327 



muscular, 311-316 



