2 go 



Inde 



X 



Scales : Chick, 2S2 

 Sclerotic coat ; Chick, 181 

 Second day, development of : 



Chick, 139 

 Secondary segmentation ; Chick, 



229 

 Segmental duct : (iee Archi- 



nephric duct) 

 Segmental plate : Frog, 70 ; 



Chick (see Vertebral plate) 

 Segmentation cavity : Frog, 20- 



21 ; Chick 105 

 complete : 96-97 

 of the egg: Frog, 17-21; 



Chick, 96-103 

 nucleus ; Frog, 16 

 relation of, to amount of yolk ; 



98-103 

 Sense capsules : Frog, 77 

 Sense organs : Frog, 40-45 ; 



Chick, 175-188 

 Serous membrane : Chick, 11 r 

 Seventh day, development of : 



Chick, 279-281 

 Sexual eminence : Chick, 239 

 Shell : Chick, 90 

 Shell membrane : Chick, 90 

 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, 



72-77 ; 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 Sperma- 

 tozoa 

 Spermatozoa : Frog, 87-88 ; 



Chick, 241 

 Sperm duct : (see Vas 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 

 Stomodosum : Frog, 45-46 



perforation of : Chick, 226 



Subgerminal cavity : Chick, 105 



Summary of development : Frog, 



2-4 ; Chick, 114-119 



of first day : Chick, 136-137 



of first half of second day ■ 



Chick, 1 51-154 

 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 

 Sylvian aqueduct or iter : Frog, 



37 

 Sympathetic nerves : Chick, 173- 



174 

 Systemic arch : Frog, 67 ; Chick, 



245 

 Systemic trunk : Chick, 245 



Tenth day, development of : 



Chick, 281 

 Testis : Frog. 87-88 ; Chick, 240 

 Thelamencephalon : Frog, 37 ; 



Chick, 224 

 Third day, development of : 



Chick, 163-221 

 Third ventricle : Frog, 37 

 Thyroid body : Frog, 50 ; Chick, 



211 

 Tongue : Chick, 281 

 Trabecular cranii : Frog, 75 ; 



Chick, 267 

 Trachea : Frog, 207 

 Transverse process : Frog, 74 

 True amnion : Chick, 168 

 Truncus arteriosus : Frog, 61 

 Tympanic cavity ; Frog, 53 ; 



Chick, 193 

 Tympanic membrane : Chick, 193 



