674 INDEX GENERUM MAMMALIUM. 
Thinolestes Marsn, 1872. Primates, Notharctide. 
Am. Journ. Sci. & Arts, 3d ser., IV, 205-206, Sept., 1872 (sep. issued Aug. 7). 
OssonN, Bull. Am. Mus. Nat. Hist., N. Y., XVI, 197, June 28, 1902. 
Type: Thinolestes anceps Marsh, from the Eocene (Bridger) of western Wyoming; 
Extinet. Based on ‘the more important part of several skeletons.’ 
Thinolestes: 9is, 01v ós, shore; Anér1s, robber—in allusion to the supposed affini- 
ties of the species with the carnivores, and to its occurrence on the margin of 
an ancient Bridger lake basin. 
Thinotherium Corr, 1870. Ungulata, Artiodactyla, Tayassuide. 
Proc. Am. Philos. Soc., XI, 292-293, 1870. 
Type: Thinotherium annulatum Cope, from the Miocene (?) of Stafford County, 
Virginia. 
Extinct. Based on ‘a second inferior incisor of the right side.’ 
Thinotherium: 61s, §1v 0s, shore; §yptov, wild beast—in allusion to its supposed 
habits. ‘‘A small Hippopotamus-like animal...no doubt like its recent 
allies, a shore-and-swamp-loving beast." (Cops. ) 
Thinotherium Marsn, 1872. Ungulata, Artiodactyla, Helohyidee. 
Am. Journ. Sci. & Arts, 3d ser., IV, 208, Sept., 1872 (sep. issued Aug. 7). 
Tinotherium Roarr, Bericht Naturwiss. Ver. Schwaben u. Neuburg (a. V.), Augs- 
burg, XXIX, 149, 1887 (misprint). 
Type: Thinotherium validum Marsh, from the Eocene in the vicinity of Henry 
Fork of Green River, Wyoming. 
Name preoccupied by Thinotherium Cope, 1870, a genus of Tayassuidee. 
Extinct. Based on ‘a portion of a lower jaw containing the last true molar, 
and two isolated lower molars.’ 
Thiosmus (subgenus of Mephitis) Licnrenstern, 1838. Ferze, Mustelidee. 
Abhandl. K. Akad. Wiss., Berlin, for 1836, 270-276, 1838. 
Species, 10: Mephitis mapurito (=Viverra mapurito Gmelin), from the vicinity of 
Pamplona, Colombia; M. leuconota Lichtenstein, from the upper Rio Alvarado, 
Mexico; M. mesoleuca Lichtenstein, from the vicinity of Chico, Mexico; M. 
moline Lichtenstein, from Chile; M. chilensis Lichtenstein, from Chile; M. qui- 
tensis ( — Gulo quitensis Humboldt), from Quito, Ecuador; M. suffocans ( — Gulo 
suffocans Iliger), from southern Brazil and Paraguay; M. patagonica Lichten- 
stein, from the Straits of Magellan; M. amazonica Lichtenstein, from the Ama- 
zon River; and M. gumillae Lichtenstein, from the Rio Apure, Venezuela. 
** It has been supposed that Lichtenstein has the priority for the subgenus 7'hios- 
mus [over Conepatus Gray, 1837], because the paper appears nominally in the 
‘Transactions’ for 1836, and my paper in the ‘Mag. Nat. Hist.,' 1837; but there 
can not be a doubt that my paper was anterior, for Lichtenstein quotes it 
throughout." (Gray, Cat. Carn. Mamm. Brit. Mus., 134, 1869.) 
Thiosmus: 020v, sulphur; 66/7) or 6646s, odor—in allusion to the strong and 
characteristic odor. 
Thiroptera (see Thyroptera). Chiroptera, Natalid:e. 
Thlzodon Corr, 1892. Marsupialia, Stagodontidee. 
Am. Naturalist, X XVI, 758-762, pl. xxir, Sept., 1892: TrovEssart, Cat. Mamm., 
new ed., fasc. 1v, 669, 1898. 
Type: TÀl:xdon padanicus Cope, from the Cretaceous (Laramie) of Wyoming. 
Extinct. Based on ‘a mandibular ramus of the left side which is nearly com- 
plete, . . . with another true molar . . . the right maxillary bone . . . and 
a molar lacking the protocone.’ 
Thixodon: 60À«co, to crush; 66@v = 0800c, tooth—in allusion to the form of the 
teeth, ‘‘specialized in the direction of... the development of a molar or 
crushing type of premolars.”’ 
