INDEX 



731 



Skin, 10. II, 63, 66, 84, 164, 165 



color, 176 



elasmobranch, 169 



human, 166 

 Skull, 25, 216, 217, 218, 219, 220, 221, 222, 

 223, 224, 228, 244, 246, 607, 610 

 Sloth, 27 

 Slug, 13 



Smell, 470, 498, 563, 572 

 Smooth muscle fiber, 142, 290 

 Snail, 12, 13 

 Snake, 52 



Sobotta, 226, 248, 250, 323, 503 

 Socket, 2 7,2, 244 

 Soft palate, 306 

 Sole, 168 



Solenocyte, 21, 400, 402 

 Soleus m., 283 

 Somatic afferent nerves, 523 



efferent nerves, 522 



(parietal] layer, 82, 83, 84, 99 



motor cells, 516 

 fibers, 489 



muscles, 284 



sensory fibers, 523 

 Somatopleure, 84, 92 

 Somite, 11, 83, 613, 614, 615 



anterior, 6r6 



mesodermal, 82, 91, 92, 93, 96 



trunk, 611, 615 

 Sound-conduction, 232, 235, 246, 329 

 South American frog (Rhinoderma), 49 



monkeys, 30 

 Sowbug, 14 

 Spalacotherium, 188 

 Spaulding, xiii 

 Special creation, 236 

 Specialization, 65 



Species, vii, ix, i, 5, 7, 8, 9, 10, 11, 55 

 Specific gravity, 46 

 Specificity, 162 

 Spectroscope, xii 

 Speech, 232 



center, 495 

 Speidel, 557 

 Sperm, 411, 414 



duct, II, 44, loi 

 Spermatheca, 7 

 Spermatic artery, 377, 393 



cord, 428, 443 



vein, 396 

 Spermatid, 37 



Spermatocyte(s), 37 



Spermatogonia, 37, 440 



Spermatophore, 45 



Spermatozoon, (oa), 8, 35, 36, 37, 38, 42, 



44, 45, 59, 426 

 Sphenodon, 26 

 Sphenoid, 225, 226, 227, 228 

 Sphenopalatine, 227 



ganglion, 537 

 Sphincter ani m., 284, 316 



ani externus m., 284, 316 



colli m., 301 



urethrae, 284 

 Spinal accessory nerve, 493, 514, 523 



cord, 19, 20, 82, 481, 489, 512, 514, 

 515, 516, 520, 531 



development of, 549, 550, 550 



gangha, 85, 473 



nerve, 85, 518, 532, 537, 625, 654 

 Spinalis m., 277 

 Spindle, neuromuscular, 571 



neurotendinous, 571 

 Spine, 246, 247 ■ 

 Spinocerebellar tract, 518 

 Spinothalamic tract, 511, 518 

 Spinous process, 244 

 Spiny, 10, 30 



Spiny ant-eater (Echidna), 27, 41, 53 

 Spiracle, 89, 331, 335, 336 

 Spiracular cleft, 609 

 Spiracular pouch, 336, 605 

 Spiral ligament, 601 



organ of Corti, 597, 600, 601, 601, 

 604 



valve, 324 

 Splanchnic arteries, 351 



(visceral) mesoderm, 83, 84, 99, 369 

 Splanchnopleure, 84, 92 

 Spleen, 365 

 Splenic artery, 391, 392 



veins, 382, 396 

 Splenius muscle, 276 

 Sponge(s), 2, 4, 5, 6 

 Spongioblast cells, 551 

 Squalus acanthias, 22, 38 

 Squamosal, 26, 218, 231, 232, 246 

 Squamous, 227, 228 

 Squid, 13, 14 

 Squirrel, 28 

 Stalk, 9 

 Stapedius m., 598 



