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 reptilian monsters, but as there were hippopotami, rhinoceri, and elephants in great numbers in and about the marsh he was never positive that the forms he saw were not of these.

When at last he stood upon firm ground after crossing the morasses he realized why it was that for perhaps countless ages this territory had defied the courage and hardihood of the heroic races of the outer world that had, after innumerable reverses and unbelievable suffering penetrated to practically every other region, from pole to pole.

From the abundance and diversity of the game it might have appeared that every known species of bird and beast and reptile had sought here a refuge wherein they might take their last stand against the encroaching multitudes of men that had steadily spread themselves over the surface of the earth, wresting the hunting grounds from the lower orders, from the moment that the first ape shed his hair and ceased to walk upon his knuckles. Even the species with which Tarzan was familiar showed here either the results of a divergent line of evolution or an unaltered form that had been transmitted without variation for countless ages.

Too, there were many hybrid strains, not the least interesting of which to Tarzan was a yellow and black striped lion. Smaller than the species with which Tarzan was familiar, but still a most formidable beast, since it possessed in addition to