Alan wrote asking about books on derivation of scientic names (Latin etc.)
I had the same need for a program I am giving to a garden club on the
derivation of scientific names of plants. I found the answer quickly by
checking with Amazon.com book supplier  I was able to get two simple books:
Gardener's Latin by Bill Neal and A Gardener's Handbook of Plant Names by
A.W. Smith.  Both give the definitions of Latin and Greek scientific names.
It is a real fun program to present. Years ago I gave it to aquarium
societies.  Hope this helps.
Glenn