290 



INDEX. 



Micl-brahi, 179 ; Hincl-brain : — Cere- 

 bellum, 180 ; Medulla, 181 ; previous 

 investigations, 181 ; Huxley, 181 ; 

 Mikluclio-Maclay, 182; Wilder, 182 



Dorso-lateral muscles, 149 

 Duodenum, origin of pancreas and 



liver from, 225, 226 

 Dursy, 68 



Calberla, development of nerves, 164 



Cardinal veins, 234 



Cartier, formation of vertebrae, 150, 

 153, 154 



Caudal vein, 234 



Cell-division, 17, 19 



Cells of the blastoderm, 34 



Ceratodus, 103 ; Prof. Huxley on, 181 



Cerebellum, development of, 180 



Cerebral hemispheres, 178 



Circulation, general : — Venous system, 

 233 ; its primitive condition, 233 ; 

 comparison with Amphioxus and 

 Annelids, 234 ; cardinal veins, 234 ; 

 caudal vein, 234 



Circulation of yolk-sack ; — previous ob- 

 servations, 235; various stages, 235; 

 difference of type in amniotic Verte- 

 brates, 237 



Cloaca, 251, 253; formation of, 221; 

 junction with segmental ducts, 221 ; 

 abdominal pockets, 222 



Ccelenterata, mesoblast of, 118, 121 



Comatula, alimentary tract, 123 



Cranial Nerves, development of, 191 — 

 205 ; early development of 5th, 7th, 

 8th, 9th and 10th, 191 ; distribution 

 of nerves in the adult, 193 ; Fifth 

 nerve:— ophthalmic and mandibu- 

 lar branches, 197 ; superior maxil- 

 lary branch, 198. Seventh and au- 

 ditory nerves, 198 ; — forking of 

 seventh nerve over hyomandibular 

 cleft, 199 ; formation of ramus oph- 

 thalmicus superficialis, 200; mor- 

 phology of branches of seventh 

 nerve, 201 ; indications of segmen- 

 tation in the head, 212 ; Glosso- 

 pharyngeal and vagus nerves, 202 : 

 — general distribution at Stage L, 

 203 ; their connection by a com- 

 missure, 203 ; its junction with 

 commissure connecting posterior 

 roots of spinal nerves, 204 ; absence 

 of anterior roots, 205 ; hypoglossal 

 nerve, 205 



Crustaceans, derivation of mesoblast, 

 121 



Dicotyledons, division of nuclei, 20 



Disc, germinal {see Germinal disc) 



Discoidal segmentation, 69 



Dohrn, Dr, development of limbs, 

 104; of nerves, 167 — 170; segmen- 

 tation of head, 215 



Eberth, suprarenal bodies, 239 



Echinoderms, derivation of mesoblast, 

 121, 122, 125 



Ehrlich, protovertebrae and muscular 

 system, 117 



Eimer, protoplasmic net-work in ova 

 of reptiles, 53 



Embryonic rim, 41, 43, 44, 47, 48, 54, 

 66,71 



Embryonic swelling, 37, 41, 71 



Epiblast, 25, 36, 42, 50, 51, 62, 68, 69, 

 75 ; stages B — G, general features, 

 82 ; stages G — K ; characters of, 97 ; 

 horny and mucous layers, 99 ; com- 

 parison with Amphibian epiblast, 

 99, 100 ; from stage K onwards ; 

 division into separate layers, 140 ; 

 placoid scales, 140 ; formation of 

 their enamel, 141 



Euaxes, mesoblast in, 51 



Excretion, the organs of, 249 — 287 ; 

 previous investigations, 249 



Excretory organs and genital ducts in 

 adult. In male : — Kidney and Wolf- 

 fian body, 250 ; Wolffian duct, 251 ; 

 ureters, 251; cloaca, 251; seminal 

 bladders, 252 ; rudimentary oviduct, 

 252. In female :— Wolffian duct, 253; 

 ureters, 253 ; cloaca, 253 ; segmental 

 openings, 254 ; glandular tubuli of 

 kidney, 255 ; Malpighian bodies, 

 255 ; relations to segmental tubes, 

 255 ; vasa efferentia, 256—260 



Eye, 77 ; development of the, 184 



Fins of embryo ; growth of, 70 ; paired 

 and unpaired ; stages G to K ; their 

 formation as lateral ridges of epi- 

 blast, 101 ; hyi^othesis of continuous 

 lateral fins, 102 ; nervous supply to, 

 103 



Fishes, formation of heart, 231 



Fishes, osseous {see osseous Fishes) 



Flemming, germinal vesicle, 6, 9 ; 

 division of nuclei, 20; segmentation, 

 20 ; formation of the layers, 40 ; 

 protoplasmic net-work in ova, 53 



Fol, germinal vesicle, 9 ; segmenta- 

 tion, 20 ; protoplasmic net-work in 

 eggs of Geryonia, 53 ; origin of 

 mesoblast, 122 



Foster and Balfoiu*, epiblast in em- 

 bryos of Birds, 101 ; protovertebra) 

 and muscle-plates in Birds, 114 



Fowl, heart of the, 230 



