244 Fish Remains and Tracks in the { March, 
sandstone, slate and trap. At the bottom, forming a low shelf 
whose base: was buried in the alluvium, was.a slate group formed 
of closely compacted laminz of slate in conformable contact with 
a bed of sandstone, which at the line of union with the slate was 
granular and siliceous, becoming compact and feldspathic on its 
upper side, where it becomes almost fused with a second bed of 
slate, the fossil layer, above which rose the trap cliff. The expo- 
sure of the first slate bed had a thickness of five to six feet, the 
' thickness of the sandstone was four feet, and that of the fossil 
_— 
a 
- Paleoniscus latus Redfd., Weehawken, N. J. 
group, as far as could be determined, eight feet, when the base oa 
_ the trap was reached. The average ‘dip of the series was 17 
N. W., and the strike N. N. E. Two photographs were taken, 
_one of the ledge itself (Plate x11), formed of the three beds, and 
_ a second at the mouth of the great tunnel, some 800 feet north of 
this point, where the fossil layer of slate rock with its lines of 
bedding can be seen conspicuously meeting the trap, fissured by 
crevices of vertical cleavage (Plate xin). The first photograph 
was rather unfortunately invaded by a local group of sitters bear- 
ing no sensible relation to its particular object. The standing 
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