I would like to thank the following people for their support, guidance and assistance: Giacomo Bernardi, Ph.D., Pete Raimondi, Ph.D. and the U.C. Santa Cruz Biology 162 fall 1998 teaching assistants and students; the Minority International Research Training (MIRT/U.C. Santa Cruz) Program for partially funding this project; William Eschmeyer and John E. McCosker at California Academy of Sciences for allowing me complete access to the collection maintained there; Peter Reinthal, Curator of the University of Arizona Museum Collection; my grandmother who has always provided a roof over my head during lean times (and there were lots!); Eric Leafstone my Macintosh buddy who always lent a hand; Marisol Guerrero Martinez, MIRT Program Assistant, for all her generosity, support, transportation, translating, and everything else that was beyond the call of duty. I would like to thank all the people who keyed out fish and supplied me with valuable comments. And a very special thank you to Linée Perkins for her patience, prodding, and valuable time reading and editing.