INDEX 



Ear — (Continued) 



Middle Ear — {Continued) 



of foetal mammal. Fig. 113, 



218 

 of man. Fig. Ill, 216 

 components of, 202; function 

 of, 202; communication 

 with throat of, 208 

 Ear muscles, reduced in man, 215 

 Ear drum, see Tympanum 

 Echidna, external ear of, 210; head 

 of. Fig. 23, 42; mouth of, 131 

 Echinodermata, Auricularia, larva 

 of sea-cucumber. Fig. 55, 93; 

 Bipinnaria, larva of starfish. 

 Fig. 55, 93 

 Ectoderm, derivation of brain 

 from, 179; of mouth from, 94; 

 of mouth-pouches from. Fig. 

 56, 94; of inner ear from, 204; 

 origin of eyes of jellyfish in, 

 174; specialization of cells of, 

 157 

 Egg cell, complexity of the fertil- 

 ized, 157 

 Egyptian, upper incisor of old. 



Fig. 72, 137 

 Ehringsdorf man, see Man, Nean- 

 derthal 

 Elasmobranchs, see Sharks, Rays, 



etc. 

 Embryo, Jacobson's organ in 

 Fig. 82, 159; muzzle of, 142 

 nose of, 162, Fig. 65, 120 

 palatal region of, Fig. 66, 121 

 teeth of, 134, Fig. 71, 135 

 gill-slits of, 127, Fig. 69, 127 

 fish-like stage of, 122; tongue 

 and larynx of, 126 

 of Amhly stoma punctatum. Fig. 



14, 26 

 of macaque. Fig. 108, 211 

 of man, Fig. 108, 211 

 of Perameles, 38, Fig. 22, 38 

 of Polypterus, Fig. 14, 26 

 of rabbit. Fig. 56, 94 

 of sturgeon. Fig. 107, 209 

 of turtle. Fig. 64, 111 

 of vertebrates. Fig. 56, 94 

 Embryonic development 

 of cyclostomes, 186 

 of Polypterus, 24 

 of Neoceratodus, 25 

 Embryology, its evidence on origin 

 of vertebrate eye, 186 



Endocrine glands, as producers of 

 hormones, 171 



Endocranium, derived from carti- 

 lage. 21 



Eoanthropus dawsoni, jaw and 

 teeth ape-like, 72; lower jaw 

 of. Fig. 37, 61; lower jaw of. 

 Fig. 45, 71; left lower molars 

 of. Fig. 38, 62; left lower 

 molars of. Fig. 41, facing 66; 

 skull, side view. Fig. 42, 68 



Eocene, mammalian remains from, 

 53; early placental mammals 

 in, 52; development of eye in 

 primates of, 55; European 

 Adapidse from, 54 



Eodelphis (Cretaceous), restora- 

 tion of face of, frontispiece; 

 skull compared with Didel- 

 phis. Fig. 27, 48; skull 

 compared with Notharctus, 

 55; skull of. Fig. 48, 78 



Eogyrinus (Lower Carboniferous), 

 Fig. 15, 28; restoration of face 

 of, frontispiece 



Epipterygoid bone, of Diadectes, 

 Fig. 62, 105 



Epipterygoid process, of foetal 

 salamander. Fig. 62, 105 



Epithelial cells, differentiation of, 

 156 



Epithelium, derivation of primi- 

 tive eye from, 176; as origin 

 of parts of the vertebrate 

 eye, 179 



Erinaceus, auditory ossicles of 

 embryo. Fig. 115, 221 



Eryops, jaw muscles of. Fig. 61, 

 103 



Ethmoid sinus, 162; its connection 

 with nasal meati. Fig. 85, 163 



Ethmoidal cartilage, ossification 

 of, 199 



Eurypterids, derivation of verte- 

 brates from forms related to, 

 182 



Eustachian tube, of frog, 207; 

 Fig, 106, 208; of man. Fig. 

 Ill, 216; in human embryo, 

 162 



Eusthenopteron (Devonian), Fig. 

 12, facing 23; face of, frontis- 

 piece; skull of, under side. 

 Fig. 53, 85; skull of, under 

 side. Fig. 63, 108 



267 



