Subject Index 



853 



Rails, 546, 555 



flightless, 555 

 Ramus(i) communicans (communicantes), 

 171, 172, 177, 179, 183, 184, 185 



dorsal, 171, 172 



of jaw, 126 



maxillaris, 178 



post-trematic, 160, 161 



pretrematic, 160, 161 



ventral, 171, 172 

 Rana, 18, 114, 152, 225, 480 



catesbiana, 458 



clamitans, 458 



esculenta, 450 



pipiens, 458 

 Range, sensory, 698 

 Ranidae, 458 

 Ranodon, 452 



Ranvier, node(s) of, 140, 141, 319 

 Hat, 640, 740 

 Rathke's pouch, 224 

 Ratitae, 542, 543, 544 

 Rattlesnake, 55 

 Ray(s), 422 



electric (Torpedo), 439, 440, 441 

 Ray-fin fishes, 420 



Recapitulation, Law of, 7, 298, 299, 349, 380 

 Receptaculum chyli, 66 

 Receptor cells, 196 

 Receptors, 158, 193, 195, 196, 199, 203, 



210, 214, 273 

 Recessus opticus, 148 

 Rectal gland, 29 

 Rectrix (rectrices), 511 

 Rectum, 14, 25, 80, 185, 276, 530, 639 

 Rectus muscles, 162, 163, 588 

 Reflex, 141 



arc, 141 

 Regulation of temperature, 184 



in birds, 525 



in mammals, 575 

 Reindeer, 757 

 Remex (remiges), 511 

 Renal arteries, 68, 71, 78, 86 



circulation, 630 



corpuscle, 84, 87, 280 



lobule, 641 



tubules, 80, 81, 87, 278, 279, 402 



veins, 71, 74, 78, 86 

 Renal-portal system, 77, 78, 630 



veins, 78 

 Repetitive radiation, 798-800, 801, 802 

 Replacing bone (see Cartilage-bone) 

 Reproduction, 231-299, 482 



ichthyopsidan type of, 787 



placental, 643 



sauropsidan type of, 787 



variations in methods of, 7S7 

 Reproductive glands, 79-81, 87, 88 



organs, 13, 79-88, 226, 258, 531 



system, 79-88, 231-281 

 Reptile(ia), 14, 22, 289, 293, 409, 410, 

 465-502, 563, 587 



Age of, 497 



alimentary system of, 26, 52, 53, 55 



Reptile(ia) — (Continued) 



behavior of, 479, 481 



birds compared with, 553 



circulatory system of, 68, 69, 71, 72, 

 465, 466 



classification of, 483-497 



contour of body, 467 



decline of, 559, 560 



development of, 249-251, 256, 257, 262, 

 263, 266, 273, 275 



early, 497 



endocrinal organs of, 220, 222, 225 



evolution of, 792 



heart of, 622, 623, 624, 625 



as land animals, 559 



lungs of, 619, 620 



mammal-like, 564, 567 



morphology of, 463-502 



muscles of, 91, 92, 98, 100, 472, 473 



nervous organs of, 150, 160, 208, 210, 

 474-482 



reproductive system of, 88, 234, 235, 

 238, 240-242, 244, 245, 482, 483 



respiration of, 464, 465 



skeleton of, 101, 115, 122, 123, 128, 133, 

 467-469, 470, 471, 472 



teeth of, 52, 53, 55 



transitional, 566 



urinogenital organs of, 79, 88, 473, 474 



viviparous, 295 

 Respiration, 213, 214, 240, 243, 246, 274 



buccopharyngeal, 447 



gaseous exchange in, 58, 241, 293, 464, 

 465, 616 



organs of, 56-61 

 Respiratory area, 618 



organs, and hearing organs, 358 

 modifications of, 787 



passages, 199, 562, 610 



surfaces, 296 

 Reticular tissue, 321 

 Retina, 149, 200, 202, 203, 204, 273 



inverted, 206, 207 



layers of, 203, 204, 205 

 Retinal artery, 203 



veins, 203 

 Retractor (s), 96 



bulbi muscle, 685 

 Rhabdopleura, 395 

 Rhamphostoma, 470 

 Rhea, 544 

 Rheiformes, 544 



Rhesus monkey, 588, 589, 594, 661, 671 

 Rhinobatus lentiginosus, 427 

 Rhinoceros, 753 

 Rhinocerotidae, 754 

 Rhomboideus muscles, 95 

 Rhynchocephalia, 484, 500 

 Rhynchotus rufescens, 547 

 Rhvtina, 763 



Rib(s), 107, 113-115, 132, 133, 137, 138, 

 471, 495, 518, 584, 586, 592 



dorsal, 113, 279 



hemal, 279 



sternal, 584 



