FIG, 
. Horizontal Section through Trunk at 
co} 
or obo 
<5 CO ~1 & 
23. 
24, 
25. 
. Maturation of the Ovum: 
. Relative 
ibs ls OF ILLUSTRA LIONS: 
ae ee 
GENERAL EMBRYOLOGY. 
Level of First Lumbar Vertebra . 
. Diagram of an Animal Cell 
Cell Division 
The Ovum and its Coverings 
Extrusion 
of the ‘* Polar Bodies” 
. Human Spermatozoa (after Retzius) 
. Structure of a Spermatozoon. 
. Fertilisation of the Ovum 
. Segmentation of the Fertilised Ovum 
in the Rabbit 
. Conversion of Morula to Blastula 
. Surface View of Blastodermic Vesicle 
. Upper Pole of Blastodermic Vesicle 
. Transverse Section of Ferret Embryo 
. Transverse Section of Ferret Embryo 
. Surface Areas of Blastoderm ; 
. Sections showing Different Areas of 
Blastodermic aWesicle 
’. Extension of Mesoderm and Wortiae 
tion of Coelom 
. Surface View of an Early. Embr yo 
. Early Stages in the Folding-off of the 
Embryo : : : : 
Positions of Blastoder- 
mic Layers in Body of Embryo 
when the “ Folding-off” is com- 
pleted . 
_ Transverse Section of Ferret Embryo ) 
22. 
Further Differentiation of the Meso- 
derm 
Coronal Section of Rat Embryc oO 
Transverse Section of Rat Embryo : 
Developing Ovum, seen in Longi- 
tudinal Section 
. Diagram of Alimentary “Canal in 
Human Embr yo about fifteen 
days old (modified from His) 
. Alimentary Canal as seen in Human 
Embryo about five weeks old 
. Formation of Tongue and Upper 
Aperture of Larynx in Human 
Embryo (after His) 
. Head of Human Embryo (four views ; 
two after His) 
. Head of Human Embryo (four v Views ; 
two after His) 
. Portion of Head of Human Embr yo 
b 
PAGE FIG. 
4 
8 | 32. 
9 
Tie 38 
12 | 34 
14 
14 | 35 
16 
16 | 36 
17 
18 | 37 
18 
19 | 38 
20 
22 
39 
22 
40 
3 
4 
4] 
26 | 
49 
| 43 
Oia 
7 | 44 
98 | 45 
29 46 
30 
47 
31 | 48 
32 | 49 
33 | 
| 50. 
35 | 51 
| 
37 | 52 
38 | 53 
. Foetal Ectoderm 
. Human Feetus at 
3. Human Fetus eight 
about two and a half months old 
(after His) 
Vertical Section through 
Rat Embryo 
Head of 
3. Transverse Section through Head ak 
Rat Embryo 
. Formation of the Pinna (modified 
from His) 
5. Separation of Cloacal Part of Hind- 
gut into Genito-urinary Tract 
and Rectum . 
. Transverse Sections of Uterus el 
Developing Ovum of Ferret 
. Relation of Young Human Ovum to 
Decidua 
. Further Stage of Development of 
Human Ovum and its Relation 
to the Decidual Tissues 
. Completion of the Decidua Capst- 
laris, ete. 
. Enlargement of Blood Sinuses in 
Maternal Part of Placenta and 
Closure of the Amnion 
surrounding the 
Maternal Blood Sinuses, ete. 
. Further Growth of Placental Sinuses 
and Vill, ete. 
. Later Stage in Development of the 
Placenta 
. Development of Blood Vessels in 
Vascular Area of the Rat 
5. Primitive Blood Vessels of Embryo 
. Blood Vessels of Mammalian Embryo 
after Formation of the Heart 
. Diagram of the Foetal Circulation 
. Human Embryo at end of 12th, 13th, 
and 14th days of ae ae 
(after His) 
. Human Embryo at 2st, “23rd, and 
27th days of Dev elopment (after 
His) 
Human Embryo at 29th and 32nd 
days of Development (after His) . 
Development (after His) 
2. Human Feetus six and a half GOS 
old (after His) ‘ 
halt 
and: a. 
weeks old (after His) 
sixth week of 
