For several years the observation of live animals has been a regular part of the laboratory procedure of our introductory zoology course. We have continued the practice these many years because it has been successful in student interest and achievement. Even though the students may many times have seen such common animals as the frog, the earthworm, or the grasshopper, most of them have never before taken time to observe their activities at close range. The students respond with much enthusiasm to this type of laboratory work, ask many questions, and give every indication that they are taking the work seriously and getting much out of the study. With adaptations, this type of study lends itself to both high school and college levels. Live study of animals has many values to recommend it. It has helped to rescue the course from mere carcass study and to restore the course to its rightful place as a study of life. Live study furthermore lends variety to the laboratory schedule of work, gives the students a chance to see how the structures operate which they have just studied in the preserved specimens, corrects abnormal impressions of the animals such as faded colors and color patterns, shriveled skins, twisted or flattened bodies, abnormal positions of limbs, and other distortions. Live animals also demonstrate their natural movements and activities, and, perhaps, also their voices. There is also an opportunity to impress respect, understanding, and consideration for animals. Pithed or anesthetized animals can also be used to demonstrate the actions of internal organs; e. g., heart beat, blood flow, lung action, peristalsis, muscle contraction, and other internal activities. Making use of the live animal supply, one can use freshly killed animals to demonstrate the natural color, normal position, distensibility (e. g., lungs) of internal organs, to offset the abnormal impressions obtained from the decolorized, and often displaced, organs of the preserved specimens. The live study follows the dissection or other morphological study of the organism in order that the student may first become familiar with the structures and their functions. Live specimens of the animals to be studied in the course are collected or purchased just before their use in the laboratory if they are available at that time. They are in best condition and will show most normal activity when they are fresh from their native habitat. If they cannot conveniently be obtained at the time they are to be studied, they are collected when available in the fall or spring and maintained in the laboratory until needed. If they must be maintained in the laboratory for some time before use, they must be kept in good condition with proper food, regular feeding, water, light, space to exercise, and in as natural surroundings as possible. Interested members of the class may be enlisted to help collect the animals and maintain them in the laboratory and may thus see the natural habitats of the animals, methods of collection, and activities of the animals in the field. Usually these volunteer helpers become so enthusiastic and interested in the field work that their enthusiasm is passed on to the class when the animals are studied. In all of these studies, it is important to keep the animals calm and unexcited so as to get somewhat normal responses from them. This is especially important in the live study of vertebrates and the higher invertebrates. To this end, the animals should be handled as little as possible. If handled, they should be handled gently and slowly. It is important to avoid quick, nervous movements of one's body and hands in or near the containers; slow movements do not excite them. Loud noises of all kinds should also be avoided. This small bit of technique in handling animals should be called to the attention of the students at the beginning of the study. Control of the class often becomes more difficult during live study exercises. The stu-