LIST OF FULL PAGE. ILLUSTRATIONS. 
Opp. Page' 
Plate I, Fig. 1. View of Volcano in Eruption (1889). 32 
Fig. 2. Volcanic Projectiles from eruption of Volcano 
(1889). 32 
Plate II. Map of the Four Lakes Country, Wisconsin. 136 
Plates III-VI. Cyclopidae and Calanidse of Central Wisconsin.. 224 
Plate VII. Map of the Area including the Waterloo quartzite 
outcrops . 274 
Plate VIII. Thin Sections of Quartzite. 274 
Plate IX, Fig. 1. Section of Portland Quartzite. 274 
Fig. 2. Section of Red Quartzite.. 274 
Plates X-XIII. Cladocera from Wisconsin. 318 
Plates XIV-XV. Details of Bunops scutifrons, Birge. 342 
Portrait of the late A. L. Chapin, D. D., LL. D. lxxi 
Portrait of the late P. R. Hoy, M. D . lxxv 
