RD > 
For purpose of comparison, some figures (quoted from various sources 
in Vıerorpr’s “Daten und Tabellen”, 2. Aufl., 1893, and in DoNALD- 
son’s “Growth of the Brain”, 1895) are also given for the newborn 
and for the adult. These figures are not in all cases directly com- 
parable with each other, but will serve to indicate approximately the 
Fig. 2. From a photograph of the left side of the model. showing the cervical, 
thoracic, and abdominal viscera, as well as the large blood vessels. In the lower part 
of the model, a portion of the external body wall, including the lower extremity and 
tail, is shown. The original model is forty-seven centimeters high, being reconstructed — 
with an enlargement of seventy-five diameters. For convenience, the model is;made in 
two segmeuts, the plane of division passing horizontally through the liver. 
Explanation: A ascending aorta. «a dorsal aorta. «‘ left aortic arch. «ae anterior 
cardinal vein (sinus-like dilatation). ce caecum, not marked externally, though its cavity 
is distinct internally. co colon. d ductus Cuvieri. Al hind limb. / lung. JZ liver. 
la left auricle. Ww left ventricle. m mesentery. pe posterior cardinal vein. ph pharynx. — 
s somite (external surface). sa anlage of sexual gland. sc origin of subclavian artery. — 
sr suprarenal body (slightly visible). ia tail. ih thymus, including the main gland and — 
also the smaller “nodulus thymiecus”. tl lateral anlage of the thyroid gland, located 
between the fourth and fifth branchial arterial arches. tm median thyroid anlage. v — 
umbilical vein. w Wolffian body. x quadrangular window cut through the thick-walled 
great omentum into the bursa omentalis. The anlage of the imperfectly differentiated 
spleen lies in the omental wall just behind this window. Internal to the omentum lies“ 
the stomach (visible through the window in the original model, though not in the 
photograph). ys yolk stalk, cut near attachment to intestinal loop. 
