Page:Popular Science Monthly Volume 68.djvu/520

516

 the hypothetical line of demarcation between the Patagonian and Tropical American fauna marked - - -. Centers of distribution in unbroken circles, and hypothetical lines of migration by arrows.

comprehensive account of his collections had ever been prepared, created the desire to examine this lavishly rich fauna. In the fall of 1887, with Mrs. E. S. Eigenmann, I began work on Agassiz's unrivaled collections, to which I had gained access through the courtesy of Mr. Alexander Agassiz, the director of the Museum of Comparative Zoology, and Mr. S. Garman, the curator of fishes. Financial and other reasons