A ventilator is cut in the roof twelve inches long and six inches wide, so that each compartment gets the advantage of an opening about six inches square. Over this a roof is made three inches above the main roof, and with stout wire cloth the opening is covered first at the under side. Then the strip of wire cloth, four inches wide, is tacked around the inside of the opening and to a board the same size as the hole, or six by twelve inches, attached to the under side of the cap.
This arrangement is more clearly shown in Fig. 25, which is a sectional view, A being the cap, B the board to which the upper edge of the wire cloth is attached, C the wire cloth, and D the main roof to the pen. The line E represents the wire cloth tacked to the under side of the opening, to prevent the reptiles crawling up and over the partition.
At the lower end of the partition an opening four inches square may be made and fitted with a wire-netting door that can be raised and lowered by a rod that extends through the cap of the ventilator. One or two staples driven over the rod at the inside of the reptile pen will prevent the rod from bending, and the wire door should slide on runners provided with a rabbet at the inside, so that it cannot be dislodged.
With this construction, the reptiles may be allowed to mingle if they are peaceable, but if the snakes molest the small lizards they must be driven into their own side and the trap-door closed. With the outer doors at the bottom and the ventilator at the top, a free circulation of air can be had; and if the floor is kept well sanded and clean, this reptile pen will make a comfortable home for a collection of such pets.
The lizard run shown in Fig. 26 is made from a wooden shoe-case open at the front, and on top of which a smaller box is mounted and connected with the lower one by means of an inclined board and an opening, through which the lizards can crawl. A ventilator is cut in the upper box and covered with wire netting; and in the lower box, at one end, a doorway is made, four by six inches, and protected by a heavy wire screen door on hinges.
A raised platform and ladder is made at one end of the large box, and in the open space one or two branches should be made fast on which the lizards can climb.