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halfway between our coast and the Island of Bermuda. A large number of temperature and other physical observations, bearing upon the migrations of mackerel and menhaden, were made, and large quantities of the small surface organisms on which those fish feed were carefully collected. The abrupt sloping bottom at the inner edge of the Gulf Stream was thoroughly investigated at numerous places, and large collections of marine life obtained, but no traces were found of the once abundant tile fish (Lopholatilus chamaeleonticeps), which first attracted the attention of the Commission to this exceedingly rich region. Several lines of dredgings and of bottom and serial temperatures were carried outward from the inner edge of this slope into depths of 1000 to 2500 fathoms, and other similar lines were made to connect it with