Vega, Francisco J.

Dr. Francisco J. Vega was Head of the Geology Department, Instituto de GeologA-a, UNAM, and Secretary of the Paleontological Society (South Central Section). His contributions deal with biostratigraphy and systematics of Cretaceous and Tertiary Crustacea and Mollusca.

Torrey Nyborg received his MS degree from Kent State University. He works with decapod crustaceans and fossil mammal and bird tracks. Torrey is currently working towards his PhD from Loma Linda University.

Dr. MarA-a del Carmen Perrilliat is a prominent specialist on Cretaceous and Tertiary Mollusca. She is

currently the...