INDEX. 



Arteries, posterior communicating branch, 265 

 pulmonary, pig, 12.0 mm., 281 



20. o mm., 317 

 sulci, 312, 320 



umbilical, pig, 17.0 mm., 310, 311 

 vertebral, pig, 12.0 mm., 273 



24 . o mm., 336 

 vitelline, 311 



chick, 211 



Ascending trigeminal tract, 263 

 Astral figures in ovum, 40 

 Atriozoa, 9 

 Auricle, pig, 12.0 mm., 282 



Bacilliform bodies, 168 

 Beale's carmine, 384 

 Biogenetic law, 3 1 

 Bladder, origin, 114 

 Blastodermic vesicle, 45 



formation of, 44 



in primates l 122 



in monkey, second stage, 128 



in rabbit, 166 



study of, 167-173 

 Blastopore, 53 



division of, 54 

 Blood, degeneration in chorion, 357 



origin, 90 



pig, 12 . o mm., 266 

 20 . o mm., 324 

 Blood-corpuscles, 93 



red, general account, 93 

 ichthyoid, 94 

 sauroid, 94 

 mammalian, 94 

 Blood-islands, 91 



chick, 179 

 Blood-plates, 94 

 Blood-vessels, definition, 90 



development in chick, 90 

 in mammals, 92 



first appearance, 66 



growth into embryo, 93 



origin, 90 



primitive course, man, 142 

 Body-cavity of vertebrates, 5 

 Body-stalk, defined, 1 1 1 



origin in primates, 123 



vessels of, 112 



and umbilical cord, 1 1 5 

 Borax carmine, 382 

 Bern's method, 387 

 Brain, 73 



Branchial arches, defined, 62 

 pig, 6.0 mm., 246, 249 

 7 . 8 mm., 222 

 9 . o mm., 258 

 10. o mm., 224 

 12 . o mm., 274 



Canal, auricular, 283 



digestive, 59 



hyaloid, 333 



neurenteric, origin of, 54, 68 



notochordal, 53 



of Schlemm, 331 

 Capsule, periotic, 78 

 Carnivora, 8 

 Carotids, origin, 100 

 Cartilage, first appearance, 304. 



Meckel's, 329 

 Cavity, abdominal, origin, 87 



anterior, 88 



head, 87 



hyoid, 87 



mandibular, 87 



pericardial, chick, 181, 209 

 origin, 87 



pleural, 87 



premandibular, 87 

 Cells, death of, 15' 



germ, 25 



lutein, 35 



removal of, 16 



somatic, 28 

 Cephalochorda, 9 

 Cerebellum, pig, 12.0 mm., 292 

 Cervical sinus, human, 147149 

 Cheiroptera, 8 

 Chick embryo, method of obtaining, i 74 



preservation, 176 



study of, 174-218 



with eight segments, 176 



comparison with rabbit, 179 

 longitudinal section, 180 

 transverse sections, 181 



with twenty-four segments, 197 



with twenty-eight segments, differentiation 



in, 216 



studied in sections, 199-216 

 Chondrostyle, 56 



pig, 24.0 mm., 336 

 Chorda dorsalis. See Notochord. 

 Chorion, chick, 203, 211 



defined, 64 



frondosum, defined, 127 



