NEPHOTHERIUM—NESODONOPSIS. 457 
Nephotherium—Continued. 
Nephotherium: végos, cloud; §yptov, wild beast—in allusion to its relationships 
with several genera. ‘‘ Las tres muelas . . . presentan caracteres que acercan 
este animal tanto á Grypotherium como á Mylodon, Scelidotherium, Pseudolesto- 
don y Lestodon, constituyendo así una verdadera forma intermediaria." 
( AMEGHINO. ) 
Nephrosteon hariNEsQUE, 1831. Cete, Physeteride. 
“Enum. & Acct. of some Remarkable Natural Objects of the Cabinet of Pro- 
fessor Rafinesque, in Philadelphia, Nov., 1831;" Monthly Am. Journ. Geol. & 
Nat. Sci., I, No. 11, pp. 510-511, May, 1832; Aaassrz, Nomenclator Zool., 
Mamm., 22, 1842. 
Species: Notnamed. The genus was based on a ‘‘flat bone, yellowish white, solid, 
hard and heavy, rounded, with a reniform base, eight inches broad and six and 
ahalf long; halfaninch thick; . . . from the alluvial region of Louisiana." It 
was supposed by Rafinesque to have been the head plate of a fish, but the name 
is included under the Cetacea by Agassiz and given as a synonym of Physeter 
macrocephalus by Leidy (Ext. Mamm. N. Am., 444, 1869); Zittel also places 
it in the synonymy of Physeter (Handb. Palaeont., IV, 177, 1892). 
“The ‘New Fossil Genus’ of Rafinesque, named ‘ Nephrosteon, . . . has no 
other foundation than one of these epiphyses from the remains of a recent 
spermaceti whale." (Hamnraw, Edinburgh New Philos. Journ., XVIT, No. 34, 
p. 362, Oct., 1834.) ** As to the bone called Nephrosteon, I acknowledge that 
it may be the epiphysis of a whale, as Dr. H[arlan] did tell me in 1831, but 
after my pamphlet was published."  (RarrNEsQUE, Atlantic Journal, Phila., 
No. 3, p. 112, 1832.) 
Nephrosteon: veppos, kidney; óóréov, bone—in allusion to the shape of the 
type specimen. 
Nepus G. Friscugn, 1814. Sirenia, Hydrodamalide. 
Zoognosia, III, 640-642, 1814. 
Type: Nepus stelleri G. Fischer, from Bering Island, Bering Sea. 
Nepus: veovs, footless—‘‘ propter defectum tarsi et phalangum in ipsa extremi- 
tate anteriori."  (FrscHER.) 
Nesciotherium RorH, 1898. Ungulata, Hyracoidea, Archzeohyracidie? 
Revista Mus. La Plata, IX, 181, 1898, (sep. p. 41). 
Type: Nesciotherium indiculus Roth, from the ‘toba terciaria’ of the Rio Collon- 
Curá, Patagonia. 
Extinct. Based on a single molar. 
Nesciotherium: Lat. nescio, to be ignorant; 05oíov, wild beast. No conozco nin- 
gün género à que podría atribuir un animal que tiene estas muelas." (Rorn. ) 
[11 
Nesocerodon (see Nesokerodon ). Glires, Theridomyid:e. 
Nesocia (see Nesokia). Glires, Murid:e, Murine. 
Nesodon Owen, 1847. Ungulata, Toxodontia, Nesodontide. 
Rept. Brit. Ass. Adv. Sci., for 1846, XVI, Notices & Abstracts, 66, 1847. 
Type: Nesodon imbricatus Owen, from the coast of Patagonia. 
Extinct. Based on the anterior part of the lower jaw and two upper molars. 
Nesodon: v6os, island; 66@v=66o0vs, tooth—in allusion to an island lobe on 
the inner side of the upper molars. 
Nesodonopsis Rorn, 1898. Ungulata, Toxodontia, Nesodontide. 
Revista Mus. La Plata, IX, 181-188, lám. vir fig. 1, 1898 (sep. pp. 41-48). 
Species, 3: Nesodonopsis burckhardti Roth, N. deformis Roth, and Stenotephanos 
speciosus Lydekker, from the ‘toba terciaria’ of the Rio Collon-Curá, 
Patagonia. 
Extinct. 
Nesodonopsis: Nesodon; wis, appearance. 
