INDEX 



Air sacs : Chick, 20g 

 Air space : Chicle, go 

 Albumen of egg : Chick, go. 

 Alimentary canal : Frog, 45-51 ; 



Chick, 203-212 

 Allantois : Chick, 161, 263 

 complete history of : Chick, 

 i6g-i72 

 Amnion: Chick, 117, 132, i6o- 

 161 

 entire history of; Chick, 167- 

 i6g 

 Amniotic cavity: Chick, 16S 

 Angioblast: 147 



Anterior chamber: Chick, 183 

 Aortic arches : Frog, 62 ; Chick, 

 145, 243 ; {see Branchial 

 blood vessels) 

 fate of : Chick, 246 

 Archenteron : Frog, 25 

 Archinephric duct ; Frog, 78 

 Area opaca ; Chick 104 

 Area pellucida : Chick, 104 

 Artery, allantoic : Chick 248 

 carotid : Frog, 61 ; Chick, 244 

 lingual : Chick, 244 

 mandibular : Chick, 244 

 pulmonary : Chick, 245 

 subclavian : Chick, 245 

 umbilical : Chick (see Allan- 

 toic artery) 

 vitelline : Chick, 145, 248 

 Auditory capsules : Frog, 77 ; 



Chick, 267 

 Auditory pits : Chick, 141 

 Auditory vesicle : Frog, 43 ; 

 Chick, 185 



Auricle : Chick, 156 

 Auricular chamber ■- Frog, 61 



Basilar plate : Frog, 75 ; Chick, 



226 

 Beak : Chick, 281 

 Bladder ■ Frog, 50 

 Blastoderm : Chick, gi, 103, 163 



section of : Chick, 121 

 Blastomere : Frog, 18 

 Blastopore : Frog, 22, 46 

 Blastula : 100 

 Blood : Chick, 146-151 



corpuscles : {see Blood) 



islands : Chick, 147 



vessels : Frog, 56-69 ; Chick, 

 146-151 

 Body-cavity : Frog, 30, 6g-72 ; 



Chick, 132 

 Brain : Frog, 36-40 ; Chick, 154, 



172-173 

 Branchial arch : {see Visceral 



clefts and folds) 

 Branchial blood vessels : Frog, 



62 

 Branchial cleft : {see Visceral 



clefts and folds) 

 Branchial folds ; {see Visceral 



clefts and folds) 

 Bulbus arteriosus : Chick, 145, 



156 



Carotid arch : Frog, 67 

 Carotid gland : Frog, 68 

 Cartilage bones : Chick, 267 

 Centra : Frog, 73 



285 



