216 BULLETIN: MUSEUM OF COMPARATIVE ZOÖLOGY. 
noted on the south side of Newton Street in Brookline, a quarter of 
a mile east of the north end of South. Street, in ledges near the west 
side of South Street a mile from the same point, and at the Arnold 
Fie. 7— A, Contact of melaphyr (M) and sandstone (ss) in the ledge back of 
the convent at Brighton (Plan). 
B. Contact of melaphyr and sandstone just southeast of the eity quarries at 
Thompsonville (Plan). 
Arboretum two miles southeast of Walnut Hill. That the impregna- 
tions are truly igneous and not mere infiltrations of fine mud is shown 
Dirk 8 
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