> The hammocks shown in that picture are not the older (WW II)
> jungle hammocks, but are tropical hammocks. I sometimes term
> these "simple" hammocks, to differentiate them from closed
> hammocks like the Hennessy or Clark hammocks, which could be
> viewed as modern versions of the jungle hammock.
You're right in that there needs to be a way to differentiate between them.
Clarks, for example, are Jungle Hammocks - they follow the model of
stretching a flat bed. Hennessy Hammocks are actually Mayan Hammocks - they
follow the model of a loose, droopy bed. Enclosure is less important than
the sleeping style, IMO.