INDEX. 



Sheath of Sehwann, 129 



Shrew, milk-teeth of, 213 



Sinus : frontal, cthmoidal, and sphe- 

 noidal, 176; maxillary, 172, 176, 178 



Sinus superior of membranous labyrinth, 

 196 



Sinus venosus, 269 



Siphouops, viscera, 305 



Siren :- horny teeth, 214 ; intestinal 

 tract, 232 ; trachea, 253 



Sirenia : palatal plates, 27 ; milk-teeth, 

 213 



Skeletogcnous layer of vertebral column, 

 33 



Skeleton, 30111 



Skin, 16 



Skinks, pectoral arch of, 90 



Skull, 5484 



bones of, 61 : alisphenoid, 75, 79 ; 

 basioccipital, 75, 76 ; basisphenoid, 

 75, 76, 79 ; basitemporal, 78, 79 ; 

 epipterygoid, 78 ; ethmoid, 80 ; ex- 

 occipital, 72 77 ; frontal, 70, 75 ; 

 frontoparietal, 74 ; jugal, 83 ; 

 maxilla, 69 79 ; mesopterygoid, 

 69 ; metapterygoid, 69 ; orbito- 

 sphenoid, 75 ; palatine, 69 79 ; 

 palatopterygoid, 61 72; palato- 

 quadrate, 61 72 ; parasphenoid. 

 57, 6672, 80 ; parietal, 7079 ; 

 premaxilla, 69 82 ; prefrontal, 76, 

 77 ; prespheuoid, 78, 80 ; pterygoid, 

 6981 ; quadrate, 61, 7079, 202 ; 

 quadratojugal, 72, 74 ; squamosal, 

 7183 ; supvaoccipital, 68, 69, 76, 

 77, 79 ; symplcctic, 61, 66, 69, 70 ; 

 transverse, 75 77 ; turbinals, 81, 

 172, 175177 ; vomer, 6979 

 bones of mandible : angular, 70, 76, 

 79 ; articular, 70, 76, 79, 202 ; coro- 

 noid, 70, 84, 87 ; dentary, 70, 76, 

 79, 84 ; splenial, 78, 84 ; supra- 

 angular, 78, 79 



Somatopleure, 9 



Somites, 9, 54 



Spatularia : vertebral column, 35 ; ribs, 

 48 



Spelerpes, tongue, 74, 223 



Spermatozoa, 3, 300 



Sphincters of intestine, 209 



Spina scapulae, 91 



Spinachia, ne.st of, 302 



Spinal cord, 129 



Spinal nerves, 152 



Spiracle, 65, 198, 246 



Spiral valve of intestine, 229 



Splanchnopleure, 9 



Spleen, 294 



Spots, blind and yellow, of retina, 189, 

 190 



Spouting apparatus of Oymnophiomi, 179 



Squalid*, connection of skull with ver- 

 tebral column, 64 



Squatina, number of vcrtcbr;c, 37 



Stapes, 70, 198, 202 



Stegosaurus : dermal skeleton, 32 ; brain. 



147 



Stomach, 209, 228236 

 Stork, thymus and thyroid, 227 

 Stylo-hyoid ligament, 84 

 Stratum corneum and Malpighii, 16 

 Structural elements, 1 

 Subdural space, 136 

 Sublingua, 223 

 Sub-pulmonary chamber, 259 

 Suctorial organs, 85, 212 

 Sulci, 132 

 Supination, 108 

 Suprarenal bodies, 161, 320 

 Suspensorium, 65, 70 

 Sympathetic, 160 

 Symphysis pubis, 98 

 Syrinx, 255 



T, 



Tactile cells, 167 

 corpuscles, 168 



Tamandua, cervical vertebrae, 46 



Tapetum, 186 



Tarsus, 102, 105109 



Taste, organ of, 167 



Teats, 27 



Teeth, 212220 



Teeth, horny, 214 



Telse choroideaj, 136 



Temporal fossa, 83 



"Tentacle," of Gynmophiona, 179 



Testis, 311326 



Testudo : dermal skeleton, 32 



Thecodout dentition, 215 



Thoracic duct, 293 



Thymus gland, 226 



Thyroid cartilage, 255 257 



Thyroid gland, 225 



Tibia, 104 



Tibiale, 104 



Tibio-tarsus, 107 



Tissues, 1 



Tongue, 222 



muscles of, 119 



Tonsils, 239, 293 



Tooth-structures, 62 



Torpedo, electric organ, 121 



Trabeculaa cranii, 57, 70 



Trachea, 252 



Tragus, 198 



Trigla : spinal cord, 131 



Triton, dorsal tin, 85 



Truncus artniosus, 2U9, 279, 280, 282 



Tuberculum impar, 225 



Tubules, of kidney, 29 j 



Tunica vaginalis, 326 



Tupaia, abdominal muscles, 117 



Turbinals : of Amphibians, 172; of Rep- 

 tiles, 174 ; of Birds, 175 ; of Mammals, 

 81, 17(3 



