Ann. Sci. Nat. (Zool.) (3)8: 203-224. Oct. 1847.

–Continuation of Gervais (1846). Consists mostly of "VII. Sur les Mammifères voisins des Dugongs, que l'on a nommés Halitherium, Metaxytherium, etc." (203-221). Summarizes previous work on fossil sirs., and presents a comprehensive list of their European occurrences (203-210). Describes the skull and dentition of the "Halitherium" from Montpellier (210-217), which he names H. Serresii, n.sp. [= Metaxytherium serresii] (221). Compares Toxodon with Halitherium and the modern dugong, concluding that this South American notoungulate is (unlike the proboscidean Dinotherium) a sir. (218-219, 221). Concludes that Halianassa, Metaxytherium, and other genera are synonyms of Halitherium; presents a diagnosis of the latter genus; and recognizes several species for which he coins the new combinations Halitherium fossilis [= Metaxytherium medium], H. Guettardi [= H. schinzii], and H. Brocchii [= M. subapenninum] (221).