The document describes the Neotropical region which includes South and Central America, the tropical lowlands of Mexico, Trinidad, and the West Indies. It is joined to the Nearctic region by the Central American isthmus and separated from other regions by sea. The fauna of the West Indies forms a complex fringing pattern rather than being part of a continental pattern.

1. Neotropical Region
South and Central America
Tropical lowlands of Mexico
Trinidad and West Indies Proper (Fauna transitional, forms a complex fringing pattern
rather than part of a continental one.)

2. Neotropical
Region
•Joined to Nearctic by
Central American isthmus
and seperated from all
other regions by sea.

3. Neotropical
Region