摘要：THE TAXONOMIC LIST OF OPISTHOBRANCHS DEPOSITED AT THE NATIONAL MOLLUSK COLLECTION (CNMO) OF THE INSTITUTE OF BIOLOGY (NATIONAL AUTONOMOUS UNIVERSITY OF MEXICO) IS PRESENTED. IT INCLUDES 170 SPECIMENS IN 21 SPECIES IN 13 GENERA AND 10 FAMILIES FROM THE MEXICAN STATES OF BAJA CALIFORNIA SUR, SONORA, SINALOA, GUERRERO, OAXACA, VERACRUZ, CAMPECHE, IN ADDITION TO SOME FOREIGN LOCALITIES. SPECIMENS COME FROM VARIOUS RESEARCH PROJECTS, OTHER INSTITUTIONS OR WERE DONATED BY PRIVATE INDIVIDUALS. THE GEOGRAPHIC RANGE OF NAVANAX INERMIS (COOPER, 1863) IS EXTENDED TO COASTAL REGION OF JALISCO, MEXICO.
