Bull. Sciences Soc. Philomathique Paris 3(82): 165-168 ("165*-169* [i.e., 265-269]", according to Allen). "Nivôse, an 12 de la République" (= Dec. 23, 1803-Jan. 21, 1804).

–Allen 521; he cites the author as "G.", the date as 1811 (the date of the completed volume), and the issue number, mistakenly, as 62. J. C. Smith 160; she ascribes this paper to G. Cuvier himself, rather than to "G.L.D.", the apparent rapporteur. P. 165: {"Dans le dugong, l'ivoire est homogène; il en est de même dans le narval, dont la défense est très-compacte."}