Index 



289 



Ninth day, development of : 



Chick, 281 

 Nose, development of : Frog, 



44-45 ; Chick, 187-188 

 Notochord : Frog, 27-28 ; Chick, 

 126, 155 

 disappearance of ; Chick, 230 

 vacuolation of : Chick, 231- 



233 

 Nucleus : {see Germinal vesicle) 

 Nucleus of Pander : Chick, 104 



Odontoid process : Chick, 230 

 CEsophagus : Frog, 50 ; Chick, 

 207 



closure of : Chick, 205-206 

 Olfactory capsule : Frog, 77 ; 

 Chick, 267 



lobe : Frog, 40 ; Chick, 173 



pit: Frog, 44; Chick, 187 

 Opercular fold : Frog, 55 

 Optic capsule : Frog, 77 



cup : Frog, 42 ; Chick, 178 



lobe : Frog, 37 



nerve : Chick, 181 



stalk : Chick, 176 



thalami : Frog, 37 



vesicle : Frog, 42 ; Chick, 141, 



155, 176 



Orientation of embryo : Frog, 

 18 ; Chick, 123 



Ossification of vertebral column: 

 Chick, 230 



Otic vesicle : (see Auditory ves- 

 icle) 



Ovary : Frog, 87-88 ; Chick, 

 240 



Oviduct : Frog, 85 ; Chick, 237 



Ovum : (see Egg) 



Pancreas : Frog, 48 ; Chick, 211 

 Parachordal rods : Frog, 75 ; 



Chick, 266 

 Parasphenoid : Frog, 75 

 Parietals : Frog, 77 

 Parovarium : Chick, 236 

 Parthenogenesis : 15 



Partial cleavage or segmentation: 



97 

 Pecten : Chick, 182 

 Pericardial cavity : Frog, 60, 72 ; 



Chick, 270-273 

 Peripheral nerves ; Frog, 40 ; 



Chick, 173 

 Permanent segmentation : (see 



Secondary segmentation) 

 Pes : Chick, 265 

 Pharynx : Frog, 46 ; Chick, 204 

 Pineal body : Frog, 39 

 Pituitary body : Frog, 37-38 

 Placenta : 93, 172 

 Plakodes : 276 



Pleural cavity : Chick, 270-273 

 Polar bodies : 1 1 

 Polyspermy : 17 

 Primary segmentation : Chick, 



229 

 Primitive germ cell (see Gono- 

 blast) groove; Frog, 30; Chick, 



124 

 ova : Chick, 240 

 streak : F'rog, 30 ; Chick, 123 

 streak, cross section of : Chick, 



124 

 streak and groove, meaning of: 



Chick, 125 

 Pro-amnion : Chick, 160 

 Proctodaeum : Frog, 45-47 ; 



Chick, 206-207 

 Pronephros : (see Head-kidney) 



fate of : (see Head-kidney) 

 Pro-otic : Frog, 77 

 Proto-vertebra : (see Mesoblastic 



somite) 

 Pulmo-cutaneous arch : Frog, 67 

 Pulmonary trunk : Chick, 244 

 Pupil: Chick, 182 

 Pygostyle : Chick, 230 



Rana temporaria : Frog, i 

 Reduction division : I2 

 Reproductive organs : Frog, 87- 



8g ; Chick, 237-241 

 Retina : Chick, 179 

 Ribs: Chick, 265 



