33* 



Index 



Segmentation Continued 

 relation of, to amount of 



yolk, 98103 

 Sense capsules: Frog, 77 

 Sense organs: Frog, 40-45; 



Chick, 175-188 

 Serous membrane : Chick, 1 1 1 

 Seventh day, development of : 



Chick, 279-281 

 Sex cells: Man, 285 

 Sexual eminence: Chick, 239 



differentiation: Man, 318 

 Shell: Chick, 90 

 Shell membrane: Chick, 90 

 Simple anomalies, 326 

 Sinus rhomboidalis : Chick, 141 

 Sinus terminalis: Chick, 147 

 Sinus venosus: Frog, 60; 



Chick, 199 

 Sixth day, development of: 



Chick, 279-281 

 Skeleton, development of: 



Frog, 7277; Chick, 226- 



230, 264-265 

 Skull: Frog, 74; Chick, 265- 



268 

 Somatic stalk: Chick, 116, 



165 

 Somatopleure : Frog, 29; 



Chick, 132 

 Spawning: Frog, 2 

 Spermatogenesis: .(see Sper- 

 matozoa) 



Spermatozoa: Frog, 87-88; 

 Chick, 241; Human, 287- 

 288 



Sperm duct: (see V as deferens) 

 Sphenethmoid: Frog, 77 

 Spinal nerve roots : Frog, 40 

 Splanchnic stalk: Chick, 165 

 Splanchnopleure: Frog, 29; 



Chick, 132 

 Spleen: Frog, 69 

 Sternum: Chick, 265 

 Stomach: Chick, 206 

 Stomodaeum: Frog, 45-46 



perforation of: Chick, 226 

 Subgerminal cavity: Chick, 



i5 



Subzonal layer, 290 

 Summary of development : 



Frog, 2-4; Chick, 114- 



119 



of first day: Chick, 136-137 

 of first half of second day : 



Chick, 151-154 

 of second half of second 



day: Chick, 162 

 of third day: Chick, 220- 



221 



of fourth day: Chick, 262 

 of fifth day: Chick, 278 

 Superficial cleavage, 97 

 Supernumerary formation, 



328 

 Sylvian aqueduct or iter: 



Frog, 37 

 Sympathetic nerves: Chick, 



173-174 

 Systemic arch: Frog v 67; 



Chick, 245 

 Systemic trunk: Chick, 245 



Tenth day, development of: 



Chick, 281 

 Testis: Frog, 87-88; Chick, 



240 

 Thalamencephalon : Frog, 37; 



Chick, 224 

 Third day, development of: 



Chick, 163-221 

 Third ventricle: Frog, 37 

 Thyroid body: Frog, 50; 



Chick, 211 

 Tongue: Chick, 281 

 Trabeculae cranii: Frog, 75; 



Chick, 267 

 Trachea: Frog, 207 

 Transverse process: Frog, 74 

 Trophoblast, 292 

 True amnion: Chick, 168 

 Truncus arteriosus: Frog, 61 



