stein. The tables are free to students working under the supervision of the directors, but independent investigators pay an annual fee of 1,000 crowns. About fifty workers are here engaged in investigations each

Fig. 2. Terrarium.

year. At present the staff of the institution is as follows: zoological section, director. Dr. Przibram, assistants, Drs. Kammerer and Megušar; botanical section, directors, Dr. Figdor and Ritter v. Portheim,

Fig. 3. Outdoor Terraria.

assistants, Herr Fröschel and Herr Freund; physico-chemical section, director. Professor Pauli, assistant, Herr Schorr; fresh-water investigations, Herr Brunnthaler.