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Show 318 DR. MAX SCHMIDT ON THE DURATION OF [Apr. 20, Names of the animals. Duration of life. Approximative. Common Pintail (Dafila acuta) Bahama Duck (Dafila bahamensis) Wigeon (Mareca penelope) Summer Duck (Aix sponsa) Tufted Duck (Fuligula cristata) Red-headed Pochard (Fuligula ferina) Common Cormorant (Phalacrocorax carbo). White Pelican (Pelecanus onocrotalus) Crested Pelican (Pelecanus crispus) .. Herring-Gull (Larus argentatus) ... Common Gull (Larus canus) Greater Black-backed Gull (Larus marinus). Black-headed Gull (Larus ridibundus) years. 17 Ascertained. years *17 *16 *19 *18 42 3 *3 *18 *17 *12 *5 12 *6 16 5 *11 13 *5 •21 months. 6 8 11 7 7 9 7 7 8 6 10 6 4 6 8 7 6 11 days. 9 15 6 0 25 20 8 0 0 2 12 14 16 6 27 13 25 7 15 The 31st of December last has been taken as latest date for the following calculation of the average lifetime of the animals in our zoological garden. As the duration of life could be determined with certainty for by far the greater part of the specimens, we simply disregarded such as were entirely unsuited for calculation. Referring to these latter, it should be mentioned that the difference between the entire number of Rodentia and the number of specimens of the same |