594 INDEX GENERUM MAMMALIUM. 
Pseudotomus Corr, 1872. Glires, Ischyromyide. 
Paleeont. Bull., No. 2, pp. 2-3, Aug. 3, 1892; Proc. Am. Philos. Soc., XII, for 
July-Dec., 1872, 467-468, Jan., 1873. 
Pseudotomys Auston, Proc. Zool. Soc. London, 1876, 78, footnote. 
Pseudomys (‘Atston’) ALLEN, Mon. N. Am. Rodentia, 944, footnote, 1877 (lapsus). 
Type: Pseudotomus hians Cope, from the Bridger Eocene of Wyoming. 
Extinct. ‘‘Represented by . . . a nearly perfect cranium." 
Pseudotomus: Wevdns, false; rouós, cutting. 
Pseudotoxodon Moreno, 1889. Ungulata, Toxodontia, Toxodontide. 
Bol. Mus. La Plata, Provincia Buenos Aires, 36-58, 1889. 
Type: Pseudotoxodon formosus Moreno, from Monte Hermoso, about 40 miles 
sast of Bahia Blanca, Province of Buenos Aires, Argentina. 
Extinct. Based on the anterior portion of a cranium, including the four incisors, a 
part of the left canine, and the first premolar on the left side. 
Pseudotoxodon: wevdrs, false; -- Toxodon. 
Pseudotroctes GrocEn, 1841. Edentata, Dasypodide. 
Hand- u. Hilfsbuch Naturgesch., I, pp. xxxii, 113, 1841; Tuomas, Ann. & Mag. 
Nat. Hist., 6th ser., XV, 191, Feb. 1, 1895. 
Type: Pseudotroctes setosus ( — Dasypus setosus Maximilian), from Brazil. 
Pseudotroctes: wevdns, false; rpoxrys, gnawer, nibbler. 
Pseudovis (see Pseudois), Ungulata, Artiodactyla, Bovidee. 
Psilodactylus Oxen, 1816. Primates, Daubentoniid:e. 
Lehrbuch Naturgesch., 3ter Theil, Zool., 2te Abth., pp. xi, 1164-1165, 1816. 
Type: Psilodactylus madagascariensis (= Sciurus madagascariensis Gmelin), from 
Madagascar. 
Psilodactylus: widos, bare; 0ctrvAos, finger—in allusion to the long slender fingers. 
Psilogrammurus GrocEn, 1841. Marsupialia, Phalangerid:e. 
Hand- u. Hilfsbuch Naturgesch., I, pp.xxx, 85, 1841; Tuowas, Cat. Marsup. & 
Monotrem. Brit. Mus., 184, 1888 (in synonymy, type fixed); Ann. & Mag. Nat. 
Hist., 6th ser., XV, 190, Feb. 1, 1895. 
Species: Phalangista vulpina (= Didelphis vulpecula Kerr, type), and P. canina 
Ogilby, from Australia. 
Name antedated by Trichosurus Lesson, 1828; and by Cercaértus (‘Gloger’) Bur- 
meister, 1837. 
Psilogrammurus: Widds, bare; pau, line; óvo«, tail—in allusion to the naked 
strip on the under side of the tail. 
Psittacotherium Corr, 1882.* Edentata, Ganodonta, Stylinodontid:e. 
Am. Naturalist, XVI, for Feb., 1882, 156-157, Jan. 25, 1882; Tert, Vert. 195, 1885. 
Type: Psittacotherium multifragum Cope, from the Puerco Focene of New Mexico. 
Extinct. s 
"sittacotheriwm; wittTakos, parrot; Inpiov, wild beast. ‘‘The short deep jaws 
of this animal must have given it a very peculiar appearance, not unlike that 
of a parrot in outline." (Copr.) 
Ptenochirus (subgenus of Pachysoma) PETERS, 1861. Chiroptera, Pteropodid:e. 
Monatsber. K. Preuss. Akad. Wiss., Berlin, 1861, pt. 11, 707-708; ErrRa, Cat. 
Sist. Fauna Filipinas, I, 7, 1895. 
Type: Pachysoma ( Ptenochirus) jagorii Peters, from Daraga, province of Albay, 
Luzon, Philippine Islands. 
Ptenochirus: zr5Qvóc, winged; xeip, hand. 
Ptenos (‘JourpAN’) Gray, 1848. Marsupialia, Phalangerid:e. 
List Spec. Mamm. Brit. Mus., p. xx, 1843. 
Nomen nudum. No earlier reference found. 
Ptenos: zr59vós, winged. 

*This name is given in the Zoological Record for 1881, Mamm., p. 29, but the 
description was not published until February, 1882. 
