324 



INDEX 



Scyphozoa, 30 



sea anemone, 30 



sebaceous gland, 272 



secretion, 19 



secondary body cavity, 59 



semicircular canal, see auditory 



organ 



semilunar, 268 

 semilunar valve, 286 * 

 seminal vesicle, 84, 122, 189, 224 

 sense organ, 179, 219, 310 

 sensory canals, 156 



nerves, 176, 185 

 septum lucidum, 293 

 serosa, 243, 248 

 sesamoid, 268, 269, 270 

 setae, 77 



shell, 62, 71 



sinus venosus, 169, 209 



siphon, 125 



Sipunculoidea, 75 



skate, 153 



skeleton, 158, 197, 256 



skin, 157, 205, 271 



skull, 160, 199, 260 



sleeping sickness, 29 



solenocyte, 47, 55, 58, 59, 141 



soma and germ cell, 311 



somatic nerves, 185, 304 



somatopleure, 148, 245, 251 



somites, 138, 147 



spermatheca, 56, 77, 85, 122 



spermatic vessels, 172, 288, 289 



spermatid, 312 



spermatozoon, 37, 190, 312, 335 



spermogones, 311 



spermocytes, 311 



sphenethmoid, 200 



sphenoid, 262 



plate, 161 

 sphenoidal fissure, 263 

 sphincter muscle, 165 

 spiders, 128 



spinal accessory, 298 



cord, 175, 216, 219, 240, 298 



nerves, 176, 179, 219, 299 

 spiracle, 118, 120, 125, 156, 166, 231 

 spiral valve, 165 



splanchnic nerve, 300 

 splanchnocoel, 138, 147, 167, 207, 208, 



230, 246, 252, 281 

 sponges, 30 

 spore, 25 

 sporocyst, 49 

 sporogony, 28 

 sporozoite, 2, 5, 25, 28 

 Sporozoa, 25 

 squamosal, 202, 264 

 stapes, 200, 221, 261, 264 



stem (Obelia), 40 



sternum, 116, 117, 203, 260 



stigmata, 118, 125 



stinging cell, 33 



stipes, 115 



stolon, 40 



stomach, 137, 164, 206, 275 



stomodeum, 73, 101, 118, 123, 163, 



205, 244, 251 

 Stomoporida, 129 

 style, 118, 122 

 stylomastoid foramen, 264 

 subclavian artery, 172, 211, 287 

 vein, 212, 289 

 subintestinal vein, 139, 169 

 sublingual gland, 275 

 submaxillary gland, 275 

 submentum, 116 

 sucker, 52 

 Suctoria, 1 

 supraoccipital, 262 

 sweat gland, 272 

 symbiosis, 24, 35 



sympathetic nerves, 176, 179, 219, 299 

 symphysis pubis, 269 

 synapses, 294 

 syngamy, 6, 11 

 systemic artery, 210 

 systole, 287 



tadpole, 230 



circulation, 232 



metamorphosis, 233 



skull, 199 

 Taenia, 45, 51, 255 

 tail fold, 241 

 Tardigrada, 91 

 tarsalia, 270 

 tarsus, 204, 270 



teeth, 156, 157, 163, 272, 274 



temporal bone, 264 



tendon, 271 



tentacle, 32, 40, 42 



tentorium, 121 



tentorium cerebelli, 264 



tergum, 116, 117 



testis, 122, 142, 224, 291, 306, 308, 310 



Texas cattle fever, 128 



thalamencephalon, 174, 215, 294 



thalamus, 174, 216, 295 



Thallophyta, 1 



third ventricle, 174, 215, 295 



thoracic duct, 289 



vertebrae, 257, 258 

 thorax, 116, 260 

 thrombocyte, 103, 168, 209, 283 

 thymus, 173, 214, 244, 290 

 thyroid cartilage, 280 



