INDEX 



211 



Silver fish, 184 



Sinus, 157. 178, 170 



Siphon, 157, 161 



Skeleton of man, 103-109; of 

 (Dials, 143; of echinoderms, 

 147, 148; of mollusea, 154; 

 of arthropoda, 173; of verte- 

 bra ta, 185, 187 



Skin, 04 



Smell, sense of, 115, 116, 175 



Snakes, 188 



Sodium chloride, 52, 75, 101 



Soft shell crab, 179 



Soil, 164 



Solid, .13, 18, 22, 60 



Spaces, 14, 15, 16, 24, 43 



Speech, 42 



Sperm cell, 91, 96, 145, 152, 169 



Sperm duct, 94, 167 



Sperm nucleus, 91 



Spermarv, 91, 170 



Spider, 173, 181 



Spinal column, 104, 105, 185 



Spinal cord, 112, 113, 114, 169 



Spinal nerve. 113, 116 



Spinnerets, 181 



Squid, 159, 160, 161 



Starch, 12, 13, 16, 18, 19, 52, 

 53, 56, 57, 58, 190 



Starfish, 49, 66, 103, 112, 148, 

 149, 150, 151, 152 



Starvation, 76 



Sternum (breast bone), 105 



Stimulants, 54 



Stimulus, 101, 113, 114 



Stomach, 49, 50, 57, 116, 150, 

 182 



Stone canal, 151 



Storage of food, 19, 76 



Structure, 1, 3, 126, 127 



Sucker, 151 



Suction, 141 



Sugar, 19, 20, 52, 56, 58, 76 



Sulphur, 53 



Summary of chapters, living 

 matter, 20, 22; respiration, 

 42-44; assimilation, 65; cir- 

 culation, 85, 86; reproduc- 

 tion, 97; irritability, 119, 

 120:. protozoa, 133, 134; 

 ccelenterata, 146; echinoder- 



mata, 153; mollusea, 160; 



vertebra ta, 187 

 Swallowing, 57 

 Sweat glands, 59, 61, 64, 83, 



117 

 Swimmerets, 180 

 Symmetry, bilateral, 149, 152, 



155; serial, 163; radial, 148, 



149, 152 

 Sympathetic system, 116 



Tape worm, 171 



Tactile organs, 176 



Tactile sense, 162, 175 



Taste, sense of, 115, 116, 175, 

 183 



Tea, 54 



Teeth, 64 



Temperature, regulation of 

 body, 82, 83, 84 



Tendon, 101 



Tentacles, 140 



Testis (see spermary), 167 



Test for starch, 12 



Theory of muscular contrac- 

 tion, 100 



Thirst, 65 



Thoracic duct, 73, 81 



Thorax, 173, 176, 181, 182 



Ticks, 181 



Tissues, 135, 136 



Tone, 74, 75, 82, 83 



Tongue, 57 



Touch, sense of, 115 



Trachea (windpipe), 35 



Tracheae, 174, 181, 183 



Trichina, 171 



Tube feet, 148, 150, 151, 152 



Tuberculosis, 41 



Turtles, 188 



Typhlosole, 164, 168 



Undifferentiated cells, 89 

 Unfertilized eggs, 176 

 Upper arm, 109 

 Urea, 60, 61, 132 

 Ureter, 61 



Vacuole, 9 



Valves, 70, 71, 81, 154 



Vasomotor nerves, 81, 82 



