INDEX 



Abducens nerve, 267 



Abducens nucleus, 262, 263 



Abnormal eggs, 2.5 



Accessory cleavage of pigeon's egg, 

 38, 43, 44 



Accessory mesenteries, 340, 341 



Acustico-facial ganglion complex, 159 

 160, 262, 268 



Air-sacs, 326, 330, 331 



Albumen, 18 



Albumen-sac, 217, 224 



Albuginea of testis, 397 



Alecithal ova (see isolecithal) 



Allantois, blood-supply of, 222; gen- 

 eral, 217; inner wall of, 220; neck 

 of, 143, 144, 316; origin of, 143, 

 144; outer wall of, 220; rate of 

 growth, 221; structure of inner 

 wall, 223; structure of outer wall, 

 223 



Amnion, effect of rotation of em- 

 bryo on, 140, 141, 142; functions 

 of, 231; head fold of, 137, 139; 

 later history of, 231; mechanism 

 of formation, 139, 140; muscle 

 fibers of, 231; origin of, 135; sec- 

 ondary folds of, 142 



Amnio-cardiac vesicles, 92, 116 



AmpuUse of semicircular canals, 291 



Anal plate, 143, 182 



See also cloacal membrane 



Angioblast, 88 



Anterior chamber of eye, 278 



Anterior commissure of spinal cord, 

 origin of, 244 



Anterior intestinal portal, 95 (Fig. 

 49), 121, 132 



Anterior mesenteric artery, 363 



Aortic arches, 198, 199, 203, 358- 

 362 ; transformations of, 359-361 



Appendicular skeleton, 434 



Aqueduct of Sylvius, 251. 



Archenteron, 55 



Area opaca, 39, 50, 61, 86; pellu- 

 cida, 39, 50, 61; vasculosa, 61, 86; 

 vitellina, 61, 62, 86 



Arterial system, 121, 126, 198, 199, 

 203, 204, 228, 358-363 



Atlas, development of, 420 



Atrium bursse omentalis, 344 



Auditory nerve, 295; ossicles, 299, 

 432; pit, 168 



Auricular canal, 354 



Auriculo- ventricular canal, 348; di- 

 vision of, 355 



Axis, development of, 420 



Axones, origin of, 235 



Basilar plate, 429 



Beak, 302, 304 



Biogenesis, fundamental law of, 4 



Blastoderm, 17; diameter of unin- 



cubated, 61; expansion of, 50, 53, 



61 

 Blastopore, 55, 82 

 Blood-cells, origin of, 118 

 Blood-islands, origin of, 86, 89 

 Blood-vessels, origin of, 118 

 Body-cavity, 115, 205-210, 333 

 Bony labyrinth, 296 

 Brain, primary divisions of, 108; 



early development of, 147, 156; 



later development of, 244-252 

 Branchial arch, first, skeleton of, 432 

 Bronchi, 325, 326 

 Bulbus arteriosus, 198, 201, 202, 348; 



fate of, 357 

 Bursa Fabricii, 314, 317, 319 

 Bursa omenti ma j oris, 344 

 Bursa omenti minoris, 344 



Canal of Schlemm, 279 



Cardinal veins, anterior, 200, 204, 



205, 363; posterior, 200, 204, 205, 



368 

 Carina of sternum, 427 

 Carotid arch, 361 

 Carotid, common, 362; external 359, 



361 ; internal, 359-361 

 Carpus, 436, 437 

 Cartilage, absorption of, 408; bones, 



definition, 407; calcification of, 



409 

 Caval fold, 344 

 Cavo-coeliac recess, 344 

 Cavum sub-pulmonale, 342 

 Cell-chain hypothesis, 255 

 Cell theory, \ 



Central and marginal cells, 41, 42 

 Central canal of spinal cord, 242 



465 



