small animal.

8. Cut away about two inches of the small intestine from the remainder,
having first tied the tube on the two sides of the section removed. Split
it open for a part of its length, and wash out its contents. Observe its
coats. Place it in a shallow vessel containing water, and examine the
mucous membrane with a lens to find the _villi_. Make a drawing of this
section, showing the coats.

9. Study the connection of the small intestine with the large. Split them
open at the place of union, wash out the contents, and examine the
ileo-cæcal valve.

10. Observe the size, shape, and position of the kidneys. Do they lie in
front of or back of the peritoneum? Do they lie exactly opposite each
other? Note the connection of each kidney with the aorta and the inferior
vena cava by the renal artery and the renal vein. Find a slender tube, the
_ureter_, running from each kidney to the bladder. Do the ureters connect
with the top or with the base of the bladder? Show by a sketch the
connection of the kidneys with the large blood vessels and the bladder.

*To demonstrate the Teeth.*—Procure from the dentist a collection of
different kinds of teeth, both sound and decayed.

(_a_) Examine external surfaces of different kinds of teeth, noting
general shape, cutting or grinding surfaces, etc. Make a drawing of an
incisor and also of a molar.

(_b_) After soaking some of the teeth for a couple of days in warm water
saw one of them in two lengthwise, and another in two crosswise, and