Forms for navigation

http://darwin-online.org.uk/content/contentblock?itemID=F1699b&basepage=1&hitpage=1&viewtype=text#1

http://darwin-online.org.uk/content/contentblock?itemID=F1699b&basepage=1&hitpage=1&viewtype=text#2

http://darwin-online.org.uk/content/contentblock?itemID=F1699b&basepage=1&hitpage=1&viewtype=text#3

text