Conchlers can find most of their general questions on taxonomy answered in a
new book by Judith Winston. It looks like it is relatively readable for a
textbook.
Winston, Judith E., 1999, Describing species: practical taxonomic procedure
for biologists: New York, Columbia University Press, xx + 518 p. ISBN
0-231-06824-5 (paperback) or -7 (hardback).
Enjoy!
Andrew K. Rindsberg
Geological Survey of Alabama