MESIODON—MESOCRICETUSs. 413 
Mesiodon (see Mesodiodon ). Cete, Physeterid:e. 
Mesitotherium Trovurssart, 1883. Marsupialia, "n 
Revue Scientifique, 3° sér., VI, No. 19, p. 592, Nov. 10, 1883; AMEGHINO, Revista 
Argentina, I, 248, Aug., 1891; TrovEssart, Cat. Mamm., new ed., p. 1176, 1898. 
New name for Mesotheriwn Moreno, 1882, which is preoccupied by Mesotheriwm 
Serres, 1857, a genus of Typotheria; and by Mesotherium Filhol, 1880, a genus 
of Artiodactyla. 
Extinct. 
Mesitotherium: a modified form of Mesotheriwm. ‘‘ Mesitotherium a l'avantage de 
ne rien changer aux intentions de l'auteur et de modifier trés peu le nom 
primitif." (Trovessart, |. c., 1883.) 
Mesoadapis LonENZ von LiBvRNAU, 1900. Primates, Lemurid:e. 
Denkschriften K. Akad. Wiss., Wien, Math.-Nat. Cl., LXX, 10, Taf. III, fig. 1, 
1900; Zool. Anzeiger, XXIV, No. 634, Mamm. 17, Jan. 21, 1901. 
Type: Mesoadapis destructus (= Palaolemur destructus Lorenz), from Madagascar. 
Extinct. Based on a skull without the lower jaw. 
Mesoadapis: u&6oc, middle; +- Adapis. 
Mesobema Hopason, 1841. Fere, Viverridz. 
Caleutta Journ. Nat. Hist., II, No. vr, 214, 413 footnote, July, 1841; Journ. 
Asiat. Soc. Bengal, X, pt. 1, No. 119, p. 910, July-Dec., 1841. 
New name for Urva Hodgson, 1837. Type Urva cancrivora Hodgson (= Gulo urva 
Hodgson), from Nepal, India. ‘‘The change of name in our genus [ Urva] is 
consequent on a general disuse of local generic terms." 
Mesobema: u£Gos, middle; Hua, step. 
Mesocetus Van BENEDEN, 1880. : Cete, Baleenidie. 
Bull. Acad. Roy. Sci. de Belgique, 2* sér., L, 22-23, 1880; Hav, Cat. Foss. Vert. 
N. Am., Bull. 179, U. S. Geol. Surv., 600, 1902 (type fixed). 
Species, 4: "fesocetus longirostris Van Beneden (type), M. lavatus Van Beneden, 
M. latifrons Van Beneden, and M. pinguis Van Beneden, all from the vicinity 
of Antwerp, Belgium. 
Extinet. 
Mesocetus: uéGoc, middle; «?jroc, whale. 
Mesocetus Moreno, 1892. Cete, Physeteridee. 
Revista Mus. La Plata, III, 395-397, lám. x, 1892. 
Type: Mesocetus poucheti Moreno, from the Tertiary (probably Miocene) in the 
vicinity of Puerto Madryn on Bahia Nueva, Territory of Chubut, Patagonia. 
Name preoccupied by* Mesocetus Van Beneden, 1880, a genus of Baleenidee. 
Replaced by Diaphorocetus Ameghino, Feb., 1894; by Zwypocetus Lydekker, 
Apr., 1894; and by Paracetus Lydekker, Apr., 1894. 
Extinct. Based on ‘‘un eráneo desgraciadamente muy mutilado y deformado.”’ 
 Mesochoerus (‘JourDAN’) Deprret, 1887. Ungulata, Artiodactyla, Suidee. 
Arch. Mus. Lyon, IV, 236, 1887; Roger, Bericht Naturwiss. Ver. Schwaben und 
Neuburg (a. V.), X XXII, 1896, 205 (synonym of Palzochoerus typus). 
Mesocherus (‘JourpDAN’) BEnGROTH, in C. O. Waterhouse's Index Zool., 219, 1902. 
Type (species not mentioned), from the Miocene of la Tour du Pin, Isére, France. 
Extinct. Based on molars. 
Mesocherus: uéGoc, middle; yozpos, hog. 
Mesocricetus (subgenus of Cricetus) NEHRING, 1898. Glires, Muridx, Cricetinze 
Zool. Anzeiger, XXI, No. 567, p. 494, Sept. 5, 1898; ibid., XXVI, No. 687, pp. 
57-60, Nov. 24, 1902 (raised to generic rank). 
Species, 4: Cricetus nigricans Brandt (—C. nigriculus Nehring), from northern 
Caucasia; C. raddéi Nehring, from Dagestan; €. brandtii Nehring, from Trans- 
caucasia; and €. newtoni Nehring, from Shumla, eastern Bulgaria. 
