INDEX OF PART I. 



Heape, on blastoderm ic layers in the mole, 18 



rudimentary blastopore in the mole, 22 

 Heart, formation of, 38, 136 



beginning of beat, 39 



endothelial tube of, 134 



folding and division of, 137, 141, 142 



saccus mmiens, 139 



septum spurium of, 141 



valves of, 141, 142 



fretum Halleri of, 141 



septum inferius of, 141 



auricular canal of, 142 



septum intermedium of, 142 



chord.v tendinea 1 of, 142 



foramen ovale of, 144 



limbus Vieussenii of, 144 



muscle of, 145 



column* carnese of, 146 



fietal, peculiarities of, 146 

 Hedgehog, placental sinuses in, 52, n. 



epiblastic attachment to uterus in, 53 

 Henle, loops of, 122 

 Hensen, canalis re-uniens of, 91 



on Wolffian duct, 118 



heart, bilateral, 134 

 Hermaphroditism ('EpAujs, 'A(/>po5rr>j, a male and 



female god), 12 



Hertvvig, 0. and R., on polar globules in 

 echinoderms, 9 



cnelom-invaginations of, 22 



coelorn, typical development of, 24 



mesodermic layers of, 26, 27, n. 



mesenchyme of, 26 

 Hind brain, 38 

 Hind gut, formation of, 36 



connection with allantois, 46 



with Wolffian duct, 118 

 His, W., abdominal stalk of, 46 



on accessory thyroid bodies, no 



allantois, 101, n. 



arterial arches, 147 



ascending roots in medulla, 66 



auricular canal, 142 



axis cylinders, growth of, 75 



blood-vessels, 151 



Broca's area, 79 



cephalic clefts, 102, n. 



endothelial tube of heart, 136 



on epiblastic origin of ganglia and posterior 

 roots, 57 



germinal cells of, 58 



on geniculate ganglion, 79 



globular processes of, 95 



on heart, bilateral, 134 



isthmus of, 67 



on laminre of cord, 60 



lens capsule, 87 



mechanical theory of development, 24 



mesoblast, origin of in part from thickened 

 rim of blastoderm, 23 



nerve fibres, somatic and splanchnic, 77 



olfactory epiblast, 98 



nerve fibres, origin of, 77, 81 



parablast, theory of, 25, 26 



on pinna, 95 



porta vestibuli of, 1 56 



on pulmonary veins, 144 



researches of, 6, n. 



saccus reunions of, 139 . 



septum atriorum, 144 

 inferius of, 141 

 between stomodoeum and fore-gut, 99 



His -continued. 



septum, transverse of, 159 



sinus arcuatus, 102 



on spinal nerves, roots of, 74 



spongioblasts of, 58 



sulcus terminalis, 102 



thyroid, 1 10 



on tuberculum impar, 102 



visceral arches, 102 



Histology (VTO', a web ; Aifyos, word), defini- 

 tion, i 



Hofrnann, gastrulation in elasmobranchs, 22, n. 

 Holoblastic ova (oAos, whole ; /8AasT/k, a germ), 

 definition of, 8 



invagination of, 22 



Homodynamy (6/j.os, the same ; Swa/us, power), 4 

 Homogeny (6/j.os, the same ; ycvos, descent), 4 

 Honiology (ifyiJs.the same ; Atfyos, word), definition 

 of, 4 



serial homology, 4 



examples of, 4 

 Hubrecht, on epiblastic connection of blasto- 



dermic vesicle with uterus, 53 

 Huxley, on two layers of c<elenterates, 23 



auditory ossicles, 168 

 Hymen, the (the god of marriage), 128 

 Hyoid, the (Y e?5os, the form of the Greek letter 



T), 166, 169 

 Hypoblast (vit6, under ; /3Aa<rTos, germ), 21 



characters of cells of, 24 



formation of notochord from, 32 



allantois from, 44, 46 

 Hypophysis cerebri (uiro<puw,to grow from below), 



68, 100. And sec PITUITARY BODY. 

 Hypospadias (vir6, under ; (nrdu>, to tear), 129 



IMPREGNATION, 11 

 Incisor foramen, 97 

 Incus (an anvil), 167, 168 

 Infundibulum, the (a funnel), 61, 67, 68 



of lung, no 



Intermediate cell mass, the formation of 

 Wolffian duct from, 115 



of permanent kidney from, 122 

 Intermaxillary process, 95 

 Intervertchral disc, 162 

 Iiitervillous space, 51 



question of blood in, 53 

 Intestines, 104 



large, 106 

 Invagination in holobltistic ova, 22 



aperture of, 22 



resemblance to blastopore, 22 

 Inversion of blastodermic layers, 23 

 Iris, 86, 87, 88 



Ischikawa on segmentation of ovum before fer- 

 tilization, 14 

 Island of Reil, 70, 73 

 Isthmus faucium, 100 

 of His, 67 



JACOBSOX'S organ, 95, 97 



KARYOKINESIS (Kapvov, a kernel ; /ctVrjim, move- 

 ment) of germinal cells, 58 



Karyoplasm (Kdpvov, a kernel ; irAeiTjua, a mould) 

 of germinal vesicle, 8 



Kessler, on lens capsule, 87 



substantia propria of cornea, 87, n. 



