328 



INDEX 



Spintiles, 44 

 Spiracle, 152, 154 

 Spiral valve, 158 

 Spleen, 158, 194, 242, 270, 272 

 Splenial, 264 

 Sponges. See Porifera 

 Spongin, 316 



Spongy layer of Paramecium, 8 

 Spore, 10, 12 

 Sporozoa, 10, 316 

 Sporozoite, 10, 12 

 Squalus. See Acanthiaa 

 . Squame, 102 

 Squamosal, 224, 226, 262, 296, 312 

 Stapes, 312 

 Sternum, 74, 88, 194, 238, 240, 252, 304, 314, 



316 

 Stigmata or respiratory openings, 76 

 Stinging cells. See Nematocyst 

 Stipes, 80, 82 

 Stomach, 66, 82, 102, 104, 106, 118, 138, 144, 



158, 194, 242, 270, 272 

 Stomodseum. See Fore-gut 

 Storing pockets (crop), 66, 72 

 Strobila, 48 



Styles, anal, 76 (cockroach) 

 Submentum, 82 



Substitution or replacement bones, 292 

 Sucker, 40, 48, 64 

 Supra-angular, 264 

 Supra-ethmoid, 224, 226 

 Supra-occipital, 224, 262, 292 

 Supra-orbital, 294 

 Supra-renal body. See Adrenal 

 Supra-scapula, 218, 304 

 Supra-trochlear fossse, 304 

 Suspensorium, 176, 264 

 Suspensory ligament, 268 

 Suture, 78 (epicranial), 260, 292 (sagittal), 



312 

 Sycon sponge, 18, 20 ; transverse section, 14, 22 ; 



316 

 Symbiotic flagellates, 32 

 Sympathetic nervous system, 230, 232, 274 

 Symphysis, 264, 308, 310, 314 

 Synangium, 170 

 Syncytium, 16 

 Syn-sacrura, 260 

 Syrinx, 244 

 Systole, 8 



Taenia. See Tape-worm 



Tail, 90, 152, 154, 238, 266, 316 



Tape- worm (Taenia), 46-52; form and general 

 structure, 46 ; proglottis, 48, 52 ; repro- 

 ductive system, 48 ; nervous and excretory 

 systems, 50 ; transverse section (proglottis), 

 50; 316 



Tape-worms. See Cestoda 



Tarso-metatarsus, 256 



Tarsal bones, 220, 256, 310 



Tarsus or ankle, 82, 190, 220, 310, 312 



Teats. See Mammae 



Teeth, 66, 82, 106, 152, 154, 190, 226 (vomerine), 

 296, 312 (heterodont), 316. See also Placoid 

 scales 



Telson, 88, 90, 98 



Temporal fossa, 262 



Tendo Achillis, 198, 310 



Tentacle, 28, 34, 114, 126, 144 



Tergum, 74, 88 



Testis : Hydra, 26, 28 ; liver-fluke, 42 ; tape- 

 worm, 50, 52 ; earth-worm, 58, 60 ; leech, 68, 

 70; crayfish, 104, 106, 108; crawfish, 106, 

 110; mussel, 138; Amphioxus, li& ; dogfish, 

 162, 164; frog, 214; Xenopus, 214; pigeon, 

 242, 248, 250 ; rabbit, 266, 288 



Thalamencephalon, 176, 226, 264 



Thigh, 190, 268 



Thigh bone. See Femur 



Thoracic region of vertebral column, 260, 298, 

 300 ; viscera, 268 



Thorax, 266, 280 



Thread-cell. See Nematocyst 



Thumb. See PoUex 



Thymus, 240 



Thyroid gland, 168, 274 ; cartilage, 274 



Tibia, 82, 256, 310 



Tibio-fibula, 220, 312 



Tibio-tarsus, 256 



Toad, Clawed. See Xenopus 



Toes. See Digits and hallux 



Tongue, 190, 23G. See also Hypopharynx 



Tongue-bars, 144 



Trachea (windpipe), 238, 244, 268, 274 



Tracheae (air- tubes), 82 



Transverse processes, 220, 298, 300, 302, 308 



Trapezium, 306 



Trapezoid, 306 



Trematoda (Flukes), 316 



Trichocysts, 6 



Trichodina, 32 



Trochanter, 82 ; great, 254, 256, 310 ; lesser 

 and third, 310 



Trochlea, 304 



Trophozoite, 10, 12 



Truncus arteriosus, 202, 208, 212 



Tuberculum or tubercle of rib, 280, 300, 304 



Tuberosity, greater and lesser, 304 



Turbinal bones, 284 



Tympanic bone, 296, 312 ; bulla, 296 ; cavity, 

 262, 296 ; membrane, 188 



Typhlosole, 60, 62, 138 



U 



Ulna, 252, 306 



TJlnare, 254 



Umbilicus, superior and inferior, 236 



Umbo, 126 



Unciform, 308 



Uncinate process of rib, 260 



Undulating membrane, 8 



Unicellular Protozoa, 316 



Upper arm, 188, 304 



Ureter, 116, 136, 162, 214, 242, 250, 286, 288 



Urethra, 290 



Urinary bladder, 136, 194, 270, 286, 290 ; papilla, 



162 ; sinus, 162 

 Urino-genital canal (urethra or vestibule), 290 ; 



sinus, 162 

 Urino-genital system : Dogfish, 162, 164 ; frog, 



214, 216 ; Xenopus, 214, 218 ; pigeon, 248 ; 



rabbit, 286, 288 

 Uropods, 90, 96, 98 

 Uropygium or tail, 238 

 Urostyle, 220, 222 

 Uterus, 42, 44, 48, 52, 290 

 Uterus masculinus, 290 



