INDEX. 633 



Nuclear skein : 8, 15 ; Frog, 97 



Nutrition of embryo : Amphioxus, 57, 62 ; Frog, 92 ; Rabbit, 370, 435 ; Man, 



Nymphse : Man, 597 



Obplacental folds of uterus : Babbit, 436 



Occipital lobe of brain: Man, 517 



Odontoblast : Rabbit, 407 ; Man, 560 



Oesophagus: Frog, 153-154; Chick, 289-290; Rabbit, 403; Man, 545, 546, 



548 

 Olfactory capsule : Frog, 204 ; Chick, 331 ; Rabbit, 432 



Olfactory lobe: Frog, 126 ; Chick, 260, 267 ; Rabbit, 379 ; Man, 513, 517, 537 

 Olfactory organ : Amphioxus, 43 ; Frog, 135-136 ; Chick, 266-267, 274-275 • 



Man, 492, 494-495, 497, 538 

 Omentum : Man, 565 

 Omission of ancestral stages : 28, 30 

 Omosternum : Frog, 213 

 Opercular cavity : Frog, 161 

 Opercular fold : Frog, 92, 161 

 Opercular spout : Frog, 161 

 Optic bulb: Frog, 137 



Optic chiasma : 'Frog, 139 ; Chick, 259 ; Rabbit, 390 ; Man, 514, 520, 540 

 Optic cup : Frog, 138 ; Chick, 211-21$ ; Rabbit, 388-389 ; Man, 539 

 Optic lobe: Frog, 123; Chick, 256 

 Optic stalk : ^V^, 125, 137-139 ; CAiflA, 267, 279 ; Rabbit, 387 ; Man, 510, 



536 

 Optic thalami : Frog, 123 ; Chick, 256 ; Rabbit, 374 ; JH/aw, 520 

 Optic vesicle: Frog, 125, 136-137; <?/«c&, 252, 260, 267, 275-276; Rabbit, 



374, 387 ; Man, 510, 539 

 Ora serrata : Chick, 279 

 Organ of Corti : Rabbit, 397 ; Man, 543 

 Organ of Giraldes : Man, 593 



Organ of Jacobson : Frog, 136 ; Rabbit, 387 ; Man, 495 

 Organ of Rosenmiiller : Man, 595 

 Outer amnion : Chick, 246 

 Outer nasal process : Chick, 288 

 Ovary : Amphioxus, 43 ; ^ 7 W7, 197 ; Hen, 228 ; Rabbit, 345-349 ; Man, 450- 



453 

 Oviduct: Frog, 195-197; Hen, 228-229; Chick, 319, 320; Rabbit, 426; Man, 



594 

 Oviposition : Amphioxus, 44, 46 ; jF/w7, 90-91, 99 

 Ovulation : Rabbit, 350-351 ; Man, 456-457 

 Ovulation, connection with menstruation : Man, 462-465 

 Ovum : structure, 3-7 ; maturation, 7-11 ; fertilisation, 11-13 ; unicellular 



character, 32 

 Ovum : Amphioxus, 43-44, 49 ; Frog, 94-100 ; Hen, 220-222, 228-232; Rabbit, 



344-351 ; Man, 448-455 



Palate : Chick, 275 ; Rabbit, 403 ; Man, 554-555 



Palatopterygoid bar : Frog, 205, 206, 207-208 ; Rabbit, 433 



Palingenetic characters : 28 



Pancreas : Frog, 156 ; Chick, 294 ; Rabbit, 411 ; Man, 564 



Pancreatic duct : Chick, 294; Rabbit, 411 ; Man, 564 



Parachordal cartilage : Frog, 203, 204, 207 ; Chick, 328, 331 ; Rabbit, 432 



Parepididymis : Man, 593 



Parietal lobe of brain : Man, 517 



Parieto-occipital sulcus : Man, 519 



Paroophoron: Man, 595 



Parovarium: Chick, 320; Rabbit, 426; Man, 595 



Parthenogenesis : 15, 16, 17, 32 



Partial segmentation : 22 



