Abstract: The aim of the serial study was to revise the species validity in accordance with the current taxonomic progresses and subsequently recatalogue the Anguilliformes collection transferred from the Pieces collection of Tunghai University (THUP) into that of National Museum of Marine Biology and Aquarium (NMMBP). A total of 240 lots with 618 specimens were reidentified as 59 species and 35 genera in 9 families. Type series of the four species described by Chen and Weng (1967) were confirmed and the lectotype for each species was designated, namely Rhynchoconger brevirostris (= Macrocephenchelys brevirostris), Myrophis cheni (“Neenchelys” cheni), Chlopsis taiwanensis (= Gavialiceps taiwanensis), and Dysomma melanurum. In addition, three newly recorded species, Echelus uropterus, Neenchelys parvipectoralis, and Phyllophichthus xenodontus, in Taiwan were recognized and described. A catalog denoted of the original THUP and the new registered NMMBP codes was provided.