PART IV. PLATE I. 
40 
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i 
/ On 
y | a 
a oe 5 
{ i e I / | 
| (erp 
' £ / § vax } 
: / | ¥° Wipe | 
\ a ( Cleavage e Cleavage 
a i \ induced by L- =g5 wnduced by 
7 - } a blow pressure 4 
d | 
E.Crisand, lith New Haven. 
GW. Hawes, del 
