Journal of the National Museum (Prague), Natural History Series Vol. 177 (9): 91-117; published on 28 April 2009 ISSN 1802-6842 (print), 1802-6850 (electronic) Copyright © Národní muzeum, Praha, 2009 Data sources for 18th century French encyclopaedists – what they used and omitted: evidence of data lost and ignored from the Mascarene Islands, Indian Ocean Anthony S. Cheke 139 Hurst St., Oxford OX4 1HE, United Kingdom; e-mail:
[email protected] ABSTR A CT . The pioneering encyclopaedias of Brisson (1756, 1760) and Buffon (1749-1767, 1770-1783, and supplements) were the first to be solidly based on specimens examined by theauthors.CollectorsintheMascarenesassembledsubstantialmaterialfortheseworks,but onlyapartendedupinthepublishedencyclopaedias.Partofthiswasduetolossintransit, butmorewasapparentlysimplyoverlookedamidstthemassofmaterialthewritersweredeal- ing with. As a result, several species collected &/or illustrated in the mid-18th century and apparentlyavailabletotheencyclopaedistswerenotformallydescribedforseveraldecades or even a century later, notably Pseudobulweria aterrima, Coracina newtoni and Taphozous mauritianus from Réunion, Alectroenas nitidissima, Nesoenas mayeri, Mascarenotus sauzieri, Mormopterus acetabulosus and Phelsuma ornata from Mauritius, and Psittacula exsul and Cylindraspis peltastes from Rodrigues. The colonial collector-correspondents also sent much useful life history data that also did not make it into print at the time. KEY WORDS . Brisson, Buffon, Réaumur, Lanux, Cossigny, Commerson, Jossigny, de Querhoënt, Mauritius,Réunion,Rodrigues,birds,mammals,reptiles. INTRODUCTION In the mid-18th century, French scientific writers published extensive natural history encyclo- paedias of world fauna based for the first time on actual specimens and travel literature instead of being largely or partly informed by myth and legend (Newton & Gadow 1896, Farber 1982).