The Lake Laboratory 79 _Herbert Osborn_ Notes on the Flora of Sandusky 82 _W. A . Kellerman_ Zoological Notes 86 _Herbert Osborn_ Notes on the Bird Life of Cedar Point 91 _Robert F. Griggs_ Plant Study at Sandusky Bay 93 _Harriet G. Burr_ Dragonflies of Sandusky 94 _James S. Hine_ Sponges and Bryozoans of Sandusky Bay 96 _F. L. Landacre_ Additions to the Sandusky Flora 97 _Robert F. Griggs_ Minor Plant Notes, No. 3 98 _W. A. Kellerman_ A List of Kansas Desmids 100 _John H. Schaffner_ Mosses; Illustrative Samples 102 _W. A. Kellerman_ Additional Note on the Syndesmon Involucre 104 _A. Wetzstein_ Meetings of the Biological Club 105 _James S. Hine, Sec._ News and Notes 106 Entered at the Post Office at Columbus, Ohio, as second class matter. =The Ohio Naturalist= PUBLISHED BY THE BIOLOGICAL CLUB OF THE OHIO STATE UNIVERSITY ─────────────────────────────────────────────────────────────────────── Vol. I. APRIL, 1901 No. 6 ─────────────────────────────────────────────────────────────────────── THE LAKE LABORATORY. HERBERT OSBORN. Most readers of the NATURALIST are probably aware that the University maintains at Sandusky a lake laboratory, devoted to the investigation and study of the life of the lake region. As this number of the NATURALIST is devoted mostly to reports upon work which has been done there, it may be of interest to give some facts regarding opportunities offered and the character of the work provided for.