TY - JOUR AB - Type specimens of Sipuncula and Echiura of Gray (1828) and Baird (1868) in the collections of the British Museum (Natural History) were re-examined by the authors. Identifications were checked and, in most instances, the specimens were redescribed. Of the 23 type specimens, the specific names of the following were shown to be senior subjective synonyms of currently accepted names: Sipunculus arcuatus Gray 1828 [= Phascolosoma lurco (Selenka and de Man 1883)], Phascolosoma perlucens Baird 1868 [= Phascolosoma dentigerum (Selenka and de Man 1883)], Themiste lageniformis Baird 1868 [= Themiste signifer (Selenka and de Man 1883)], and Aspidosiphon jukesii Baird 1873 [= Aspidosiphon corallicolus Sluiter 1902]. Five were shown to have currently accepted valid names, one was a nomen dubium, and the remainder were junior synonyms to currently used names. A1 - Rice, M. E., Stephen, A. C. JO - Bulletin of the British Museum (Natural History). Zoology C1 - 20(2): 42–72, plates 1–3. TI - The type specimens of Sipuncula and Echiura described by J. E. Gray and W. Baird in the collections of the British Museum (Natural History) UR - https://www.biodiversitylibrary.org/page/2344732 PY - 1970 Y2 - 2024-03-29 ER -