INDEX 



153 



Seminiferous tubules, 67 



Sero-amniotic connection, 127 



Shell-membrane, 72 



Shell of egg, 71 



Shoulder girdle, 25 



Sinuses of inner ear, 102 



Sinusoids of liver, 55, 134 



Skin, 104 



Skull, 15 



Small intestine, 49 



Somatopleure, 123 



Somites, 122 



Spermatids, 67 



Spermatocytes, 67 



Spermatogonia, 67 



Spermatozoa, 67, 69 



Sperm-nuclei, 113 



Sphenoid bone, 18 



Spinal cord, 90 



Spinal ganglion, 95 



Splanchnopleure, 123 



Spleen, 86 



Splenial bone, 21 



Sternum, 14 



Stigma, 112 



Stomach, 46 



Stomoda^um, 132 



Subgerminal cavity, 115 



Superior umbilicus of feather, 106 



Supra-angular bone, 21 



Syrinx, 59 



Tarsus, 33 



Temporal bones, 19 



Tertiary bronclii, 60 



Testes, 66 



Thalami, 93 



Third ventricle, 94 



Thoracic air-sacs, 62 



Thoracic ducts, 85 



Thoracic vertebrae, 12 



Thymus, 87 



Thyroid, 87 



Tibia, 33 



Tongue, 41 



Trachea, 58 



Truncus arteriosus, 140 



Tympanic cavity, 17 



Tympanic membrane, 101 



Tympaniform membranes, 59 



Tympaniun, 101 



Ulna, 27 

 Ureter, 64 



Uriniferous tubules, 65 

 Urodaeum, 53 

 Uro-hyal bone, 23 

 Uropygial gland, 104 

 Uterus, 75 

 Utricle, 102 



Vagina, 75 

 Vein or veins — 



caudal, 84 



caudal mesenteric, 85 



caudal vena cava, 83 



coccygeo-mesenteric, 85 



common iliac, 83, 85 



cranial mesenteric, 85 



cranial vena cava, 83 



femoral, 85 



gastro-duodenal, 85 



hepatic, 83 



hypogastric, 85 



internal iliac, 85 



jugular, 83 



portal, 85 



pulmonary, 83 



renal, 85 



subclavian, 83 



mnbiUcal, 141 



vitelline, 129 

 Venous terminal sinus, 138 

 Ventricles of brain, 91, 92, 



94 

 Ventricles of heart, 80 

 Vertebral colunrn, 9 

 Vestibule of ear, 102 

 Vexillum of feather, 105 

 Villi, 51 



Vitelline area, 117 

 ViteUine membrane, 112 

 Vitreous body, 100 



Wolffian body, 135 

 Wolffian duct, 135 



Yolk of egg, 73 

 Yolk-sac, 123 



Zoological position of fowl, 1 

 Zygomatic bone, 20 



