*Transitional epithelium.*--Occurs in the pelvis of the kidney, ureter and bladder. It is very readily detached, especially if not hardened immediately after death. Remove as early as possible. If the bladder is taken it should be cut open and pinned out as flat as possible. Harden in osmic acid, or Müller’s fluid and spirit. Embed preferably in celloidin. *Simple columnar epithelium.*--Occurs in many parts. It may be studied in the salivary ducts, the intestine, kidney, &c., of any mammal. *Goblet-cells.*--Seen abundantly among the columnar cells of the intestinal glands, and in the mucous glands of the mouth and of the cervix uteri. *Stratified columnar epithelium.*--Occurs only in the urethra. Harden the penis of a cat in Müller’s fluid, and cut transverse sections. *Ciliated epithelium.*--Harden the trachea of a recently killed cat in osmic acid or Müller’s fluid. Beautiful specimens may also be obtained from an ordinary nasal polypus, which should be put into hardening fluid immediately after removal. Stain all sections of epithelium in picrocarmine, and in eosine and hæmatoxyline. *Ordinary areolar tissue.*--Difficult to obtain free from fat. It may be studied in the subcutaneous tissue of the section of the cat’s penis already made. A fragment of the tissue should also be removed and carefully teased in a drop of picrocarmine. Areolar tissue may also be studied in sections of skin, and in the capsules of the different internal organs. *Elastic tissue.*--May also be studied in most sections of skin. If the ligamentum nuchæ of a large quadruped (horse, bullock), &c., is available it yields the best specimens, or the human ligamenta subflava may be examined. Pin a piece out on a piece of wood or wax. Harden in Müller’s fluid. Stain in picrocarmine. Both sections and teased specimens should be prepared. *Tendon.*--Readily obtained from an amputated limb. Harden in Müller’s fluid. Make transverse and longitudinal sections. Stain with eosine and hæmatoxyline. A preparation should also be made by teasing a little of the fresh tendon in normal salt solution, and staining with picrocarmine. *Retiform* or *lymphadenoid tissue*.--Seen in lymphatic glands and in the lymphoid follicles scattered along the sub-mucous coat of the alimentary canal. Prepare sections in the ordinary way. Stain in eosine and hæmatoxyline or in picrocarmine. Some sections should also be prepared by pencilling (_i.e._, dabbing with a camel’s hair brush) or by shaking sections up in a test tube with water or normal salt solution. By this means the leucocytes are removed, and the structure of the adenoid tissue itself becomes more evident. *Fat.*--Best studied in sections of skin and subcutaneous tissue, or in the mesentery of the cat. One specimen should be stained with osmic acid and picrocarmine and mounted in Farrant’s medium, and another in eosine and hæmatoxyline and mounted in Canada balsam.