INDEX. 



373 



Cinerea, 177 



pig, 17 mm., 234 

 Cloaca, pig, 9 mm., 221 



pig, 17 mm., 239 

 Ccelom, defined, 35 



division of, 79 

 chick, 283 



extra-embryonic, 76^ 



of head, 83 



origin of, 75 



pericardia!, 76, 96 

 chick, 297 

 pig, 12 mm., 195, 198 



pockets of, chick, 289 



umbilical, pig, 9 mm., 226 

 pig, 17 mm., 239 



ventral, 82 

 Commissure, ganglionic, 177 



posterior, 265 



superior, 265 



Compact layer of decidua, 328, 335 

 Connective-tissue stain, Mallory's, 370 

 Continuity, theory of germinal, 40 

 Cord, umbilical, placental insertion of, 339 



structure of, 351 

 Cornea, 259 



pig, 24 mm., 261 

 Corona radiata, 45 

 Corpora quadrigemina, 207 

 Corpus luteum, 46 



striatum, 258 

 Costal processes, 233 

 Coste's embryo, 134 

 Cotyledons of placenta, 337 

 Counterstains, 368 

 Cutis, pig, 17 mm., 232 



pig, 20 mm., 250 



plate, pig, 6 mm., 230 

 Cytomorphosis, 27 



D. 



Darwin's theory of pangenesis, 41 

 Death of cells, 31 

 Decidua menstrualis, 317 

 reflexa, 320, 325 

 anlage of, 118 

 at two months, 326 

 at three months, 326 

 defined, 119 

 serotina, 320, 334 

 defined, 119 

 subchorialis, 336 

 vera, 320, 322, 327 



defined, 119 

 Decidual cells, 336 



defined, 118 

 formation of, 324 

 Deck-plate, 74 

 Degeneration, 31 

 Development, summary of, 25 

 types of, 32 



Diaphragm, anlage of, 82 

 pig, 20 mm., 252 

 pig, 24 mm., 267 

 Diencephalon, pig, 9 mm., 222 



pig, 12 mm., 205 

 Differentiation, 29 



in chick with three gill-clefts, 293 

 types of, 30 

 Dilatations, 37 

 Dipnoi, 23 

 Discus proligerus, 45 

 Diverticula, 37 



Dorsal flexure of embryo, 136 

 furrow, 70 



zone of medulla, pig, 9 mm. , 227 

 of medulla oblongata, 21 1 

 of medullary canal, 74 

 pig, 12 mm., 184 

 Ducts of Cuvier, 141 



chick, 98, 282 

 pig, 12 mm., 198 

 pig, 20 mm., 251 

 urogenital, 21 

 Ductus arteriosus, 1 68 



endolymphaticus, 177 

 pig, 12 mm., 208 

 venosus, pig, 9 mm., 221 



pig, 20 mm., 251 

 Duodenum, pig, 24 mm., 267 



E. 



Ectoderm, defined, 26 



structure of, chick, 293 

 Ectoglia, 177 



pig, 20 mm., 242 

 Eggs of frog, inverted, 28 

 Elasmobranchs, 23 



Embryo, general homologies of vertebrate, 77 

 growth of, 107 

 half, 28 

 human, calculation of the age of, 112 



classification of early stages, 113 



Nackengrube, 146, 150 



relations to the uterus, 118 



umbilical coelom, intestines in, 151 



twenty-eight days, 145 



thirty-six days, 148 



forty days, 149 



fifty days, 150 



sixty days, 151 



seventy-five days, 152 



three months, 153 



four months, 156 



See also Human Embryo. 

 measuring, 356 

 orientation for sections, 360 

 primitive type, 77 



resemblance to lower adult forms, 43 

 separation from yolk, 109 

 serial sections of, 360 

 shrinkage in paraffin, 175 



