E-text prepared by Bryan Ness, Turgut Dincer,
and the Online Distributed Proofreading Team
([http://www.pgdp.net])
from page images generously made available by
Internet Archive/American Libraries
([http://www.archive.org/details/americana])

Note: Images of the original pages are available through Internet Archive/American Libraries. See [ http://www.archive.org/details/onoriginmetamorp00lubb]

Transcriber's note:
All non-italic genus names in the text have been italicized.