iv CONTENTS. 



Page 



APPENDIX. STATISTICAL TABLES 73 



Table I. Total volumes of plankton per square meter in Green 



lake 73 



Table II. Total volumes of plankton per square meter in Lake 



Winnebago 74 



Table III. Total volumes of plankton per square meter in va- 

 rious Wisconsin lakes 75 



Table IV. Numbers of D. minutus and D. sicilis per square 



meter in Green lake 77 



Table V. Numbers' of D. oregonensis per square meter in 



Lake Winnebago 78 



Table VI. Numbers of E. lacustris per square meter in Lake 



Winnebago 78 



Table VII. Numbers of E. lacustris per square meter in Green 



lake 79 



Table VIII. Numbers of L. rnacrurus per square meter in 



Green lake 79 



Table IX. Numbers of C. brevispinosus per square meter in 



Lake Winnebago 80 



Table X. Numbers of C. pulchellus per square meter in Lake 



Winnebago 80 



Table XI. Numbers of C. leucfcarti per square meter in Lake 



Winnebago 81 



Table XII. Numbers of C. prasinus per square meter in 



Green lake 81 



Table XIII. Numbers of copepod larvae per square meter in 



Lake Winnebago 82 



Table XIV. Numbers of copepod larvae per square meter in 



Green lake 82 



Table XV. Nos. of Diaphanosoma brachyurum per square 



meter in Lake Winnebago 83 



Table XVI. Numbers of D. hyalina per square meter in Lake 



Winnebago 83 



Table XVII. Numbers of D. hyalina per square meter in 



Green lake 84 



Table XVIII. Numbers of Bosmina per square meter in 



Green lake 84 



Table XIX. Numbers of Eurycercus lamellatus per square 



meter in Lake Winnebago 85 



Table XX. Numbers of Chydorus per square meter in Lake 



Winnebago 85 



Table XXI. Numbers of Leptodora per square meter in Lake 



Winnebago 86 



Table XXII. Numbers of Cypris per square meter in Lake 



Winnebago 86 



Table XXIII. Maximum depth of Wisconsin lakes 87 



INDEX.. 91 



