Index 



Mesonephros : (see Wolffian 



body) 

 Metanephros: (see Kidney, 



permanent) 



Microcephalic embryos, 326 

 Mid-brain: Frog, 37; Chick, 



141 



Mid-gut: Chick, 203 

 Milk ridges, 321 

 Monsters, double, formation 



of, 329 

 Monstra per defectum, 326- 



327 

 Monstra per excessum, 327- 



3 2 9 

 Mullerian duct: Frog, 83-85; 



Chick, 233-234 

 fate of : Frog, 8 5 ; Chick, 237 

 Multiple births, 328 

 Muscle plate: Chick, 214 

 Muscular system, develop- 

 ment of: Frog, 69-72 

 Myoccel: Chick, 214 

 Myotomes: (see Mesoblastic 

 somites) 



Nails: Chick, 282 



Nares: Frog, 45; Chick, 187 



Nasal pits: Frog, 44; Chick, 

 187 



Nephrostomes: Frog, 78; 

 Chick, 218 



Nervous system, develop- 

 ment of: Frog, 3140 



Neural arch, canal, fold, 

 groove, and plate: (see 

 Medullary) 



Neural canal: Mammal, 296 



Neurenteric canal: Frog, 34; 

 Chick, 135136, 206 



Nictitating membrane: Chick, 



183 

 Ninth day, development of: 



Chick, 281. 

 Nipple, 322 



Nose, development of: Frog, 



44-45; Chick, 187-188 

 Notochord: Frog, 27-28; 

 Chick, 126, 155; Mam- 

 mal, 296 

 disappearance of: Chick, 



230 

 vacuolation of: Chick, 231- 



2 33 

 Nucleus: (see Germinal vesi- 



cle) 

 Nucleus of Pander: Chick, 104 



Odontoid process: Chick, 230 

 (Esophagus: Frog, 50; Chick, 

 207 



closure of: Chick, 205-206 

 Olfactory capsule : Frog, 7 7 ; 

 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, i55, i7 6 

 Orientation of embryo : Frog, 



18; Chick, 123 



Ossification of vertebral col- 

 umn: Chick, 230 

 Otic vesicle: (see Auditory 



vesicle) 

 Ovary: Frog, 87-88; Chick, 



240 



Over-large development, 327 

 Oviduct: Frog, 85; Chick, 237 

 Ovulation (human), 322 

 Ovum: (see Egg) human, 286 



Pancreas: Frog, 48; Chick, 

 211 



