MESOLAMA—MESOREODON. 415 
Mesolama—Continued. 
Type: Mesolama angustimaxila Ameghino, from El Paso de la Virgen, near 
Lujan, Province of Buenos Aires, Argentina. 
Extinct. Based on a lower jaw. 
Mesolama: u£60c, middle; + Lama. 
Mesomys WacxEn, 1845. Glires, Octodontide. 
Wiegmann's Archiv Naturgesch., 1845, Bd. 1, 145. 
Type: Mesomys ecaudatus (Natterer) Wagner, from Borba, Amazonas, Brazil. 
Mesomys: uéGos, middle; “0s, mouse—in allusion to its relationships with Lon- 
cheres and Echinomys. 
Mesonyx Corr, 1872. : Creodonta, Mesonychidee. 
Palzont. Bull., No. 1, p. 1, July 29, 1872; Proc. Am. Philos. Soc., XII, for July- 
Dec., 1872, 460, Jan., 1873; Ann. Rept. U. 8. Geol. & Geog. Surv. Terr., for 
1872, 550, 1873; Tert. Vert., 348, 1885. (Date of publication. ) 
Type: Mesonyx obtusidens Cope, from the Eocene of the bluffs on Cottonwood 
Creek, Wyoming. 
Extinct. ‘‘ Represented by a large part of the skeleton." 
Mesonyx: uéGos, middle; ovvé, claw. 
Mesoodon (subgenus of Ziphius) BRANDT, 1878. Cete, Phy seteride. 
Mém. Acad. Imp. Sci. St. Pétersbourg, 7° sér., X X, 220-221, 1873. 
Mesodon (* BRANDT!) Trovugssart, Cat. Mamm., new ed., fasc. v, 1063, 1898 ( mis- 
print in synonymy); C. O. Waterhouse, Index, Zool., 219, 1902. 
Species, 3: Ziphius longirostris Cuvier, from Paris, France; Z. becani Gervais and 
Van Beneden, from Antwerp, Belgium; and Mesoplodon christoli Gervais, 
from Poussan, Département d' Hérault, France. 
Name preoccupied by Mesodon Rafinesque, 1819, a genus of Mollusca; and by 
Mesodon Wagner, 1851, a genus of Pisces. 
Extinct. 
Mesoodon: uéGos, middle; 66@v=ddo0vs, tooth—irom the position of the tooth 
near the middle of the lower jaw. 
Mesophylla Tuowas, 1901. Chiroptera, Phyllostomatide. 
Ann. & Mag. Nat. Hist., 7th ser., VIII, 143-155, Aug., 1901. 
Type: Mesophylla macconnelli Thomas, from the Kanuku Mountains, British 
Guiana (alt., 2,000 ft. ). 
Mesophylla: é60s, middle; @vAAor, leaf—in allusion to the minute secondary 
leaflet in the middle line of the muzzle. 
Mesopithecus WaGNer, 1839. Primates, Cercopithecidee. 
Gelehrte Anzeigen, München, VIII, Nr. 38, pp. 306-311, Feb. 21, 1839; 
Abhandl. Math.-Phys. Cl. K. Bayer. Akad. Wiss., München, III, 154-163, 
Tab. 1, figs. 1-3, 1843; ibid., VIII, Iste Abth., 112-115, Tab. m1, figs. 1-3, 1857. 
Type: Mesopithecus pentelicus Wagner, from the Lower Pliocene (Pikermi beds), 
at the foot of Mt. Pentelicus, near Athens, Greece. 
Extinct. Based on ‘ein Schiidelfragment.’ 
Mesopithecus: u£Gos, middle; zifnKos, ape. 
Mesoplodon Gervais, 1850. Cete, Physeteride. 
Ann. Sci. Nat., Paris, 3* sér., Zool., XIV, 16, July, 1850; W. L. ScLATER, Mamm. 
S. Africa, II, 193-196, fig. 144, 1901 (type given as M. bidens). 
Type: Delphinus sowerbensis Blainville, from Brodie, Elginshire, Scotland. 
Mesoplodon: uéGoc, middle; ózA«, arms; 66@v=66o0vs, tooth—i.e., armed with 
a tooth in the middle of the jaw—in allusion to the prominent tooth in the 
lower jaw, usually some distance behind the apex of the ramus. 
Mesoreodon Scort, 1893. Ungulata, Artiodactyla, Agriochceridee. 
Am. Naturalist, XXVII, No. 319, pp. 659, 661, July, 1893; Trans. Am. Philos. 
Soc., XVIII, 125-146, pls. i11 fig. 29, rv figs. 32-34, v figs. 35-44, vi figs. 46-47, 
May 23, 1894. 
