EXPLANATION OF PLATE XXXIV. 
Figure 1. LIMN#A STAGNALIS APPRESSA Sey) Meee eee ; eo, 
“2. PHYSA HETEROSTROPHA Say. | Ses hres ‘oad 
« 3. Puysa sayit Tappan. MAME CoA ites Poot hte.” 
_ “ 4, PHYSA GYRINA Say. Bt ke ape ne 
“ 5, PHYSA GYRINA ELLIPTICA Lea. | Cae 
“6, PHYSA INTEGRA Haldeman. 
“ %, PHYSA SAYII Tappan. poet eres variety. 
All natural diameter. 
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