Figure 16_e_ is in the region of the liver and the Wolffian bodies; it also shows the tip of the ventricular end of the heart. The liver (_li_) is a large irregular mass, of a blotchy appearance under this magnification, lying between the heart (_vn_) and the intestine (_i_). Under greater magnification it is seen to be made up of indefinite strings of cells; and its still wide opening into the intestine may be seen in more posterior sections. The intestine (_i_), which in this section might be called the stomach, is a fairly large cavity with the usual thick entodermic walls; it is supported by a comparatively narrow mesentery. The body cavity on the side next this mesentery has the same thick lining that was noted in the region of the lungs. The convolutions of the thick peritoneal lining may easily be mistaken in places for parts of the enteron. The Wolffian bodies may be seen as two groups of tubules (_wt_) in their usual location. The heart is cut through the ventricle (_vn_), as has been said. The section being at right angles to the long axes of the villi-like growths of the myocardium, the depressions between these mesoblastic cords are seen as a number of small irregular areas, each one lined with its endocardium. The incompleteness of the body wall below the heart is apparently due to an artificial break and not to a lack of fusion. The only point that need be mentioned in connection with the structures of the dorsal part of the section is that the distinctness of the myocœl (_myc_) on the right side is somewhat exaggerated. Figure 16_f_ is in the middle region of the embryo where both splanchnopleure and somatopleure are unfused. Owing chiefly to the unclosed condition of the midgut (_i_) and to the increase in length of the mesentery (_ms_), the section is quite deep dorso-ventrally. The continuation of the amnion (_a_) with the somatopleure is of course here evident. The most striking feature of the section is the marked projection of the Wolffian ridges, though no local enlargements of these ridges indicate the rudiments of the limbs. A large mass of Wolffian tubules (_wt_) is seen projecting into the upper part of the body cavity on each side; close to each of these masses is the posterior cardinal vein (_pc_), and between them is the large aorta (_ao_). The other structures are about as in the preceding section.