PTILODUS—PUELIA. 597 
Ptilodus Corr, 1881. Allotheria, Plagiaulacide. 
Am. Naturalist, X V, for Nov., 1881, 921-922, Oct. 28, 1881; Tert. Vert., 172, 1885 
(date of publication). 
Type: Ptilodus medixvus Cope, from the lowest Eocene (Torrejon) of New Mexico. 
Name preoccupied by Ptilodon Hübner, 1806, a genus of Lepidoptera. 
Extinct. Based on ‘a single tooth of the lower jaw.’ 
Ptilodus: zrilov, feather; ddo0vs, tooth. 
Ptilotus G. Fiscuer, 1814. Marsupialia, Phalangerid:e. 
Zoognosia, III, 512-515, 1814; Turowxas, Cat. Marsup. & Monotrem. Brit. Mus., 
150, 1888 (in synonymy, type fixed). 
Species: Petaurus australis Shaw (type), from Botany Bay, New South Wales, 
Australia; and Ptilotus sciureus (= Didelphis sciureus Shaw ), from Norfolk Island. 
Name antedated by Petaurus Shaw, 1791. 
Ptilotus: zriÀcrós, winged. 
Ptychocetus Giocer, 1841. Cete, Baleenidee. 
Hand- u. Hilfsbuch Naturgesch., I, pp. xxxiv, 174, 1841; Tuomas, Ann. & Mag. 
Nat. Hist., 6th ser., XV, 191, Feb. 1, 1895. 
New name for Bal:enoptera Lacépede, 1804. 
Ptychocetus: zr0&, fold; ?jros, whale—from the plicated skin of the throat. 

Ptychochoerus Firzincrer, 1864. Ungulata, Artiodactyla, Suidee. 
Anzeiger Math.-Nat. Cl. K. Akad. Wiss. Wien, I, 181-182, 1864; Sitzungsber. 
Math.-Nat. Cl. K. Akad. Wiss. Wien, L, Abth. 1 (Sitz. Nov. 10, 1864), 408—414, 
1865; Zool. Garten, Frankfurt a. M., VI, No. 1, pp. 34-36, Jan., 1865; Ann. & 
Mag. Nat. Hist., 3d ser., XV, No. 85, p. 80, Jan., 1865. 
New name for Centuriosus Gray, 1862.  ** Betrachte ich das runzelstirnige Falten- 
schwein . . . für den Representanten einer besonderen Gattung, für welche 
ich statt des barbarischgn Namens 'Centuriosus" die Benennung Ptychochoerus 
in Vorschlage bringe." (Fitzinger, Sitzungsber., p. 413.) 
Ptychochoerus: xtvé, zrvxOsc, fold; yotpos, hog—in allusion to the wrinkled face. 
Ptychorhina (subgenus of Phyllorhina) PETERS, 1871. Chiroptera, Rhinolophide. 
Monatsber. K. Preuss. Akad. Wiss., Berlin, June, 1871, 325-326. 
Type: Rhinolophus caffer Sundeyall, from Africa. 
Ptychorhina: zr(&, zrvyós, fold; pis, Ary ds, nose. 
Ptyssophorus AMEGHINO, 1889. Glires, Murid:e, Neotomine. 
Cont. Conocimiento Mamíf. Fósil. Reptib. Argentina, in Act. Acad. Nac. Cien., 
Córdoba, VI, 111-112, pl. 1v fig. 1, 1889. 
Type: Ptyssophorus elegans Ameghino, from the Pampean formation (Pliocene) 
near Villa de Lujan, Buenos Aires, Argentina. 
Extinct. ‘‘ Representada por la rama derecha de la mandibula inferior con el 
incisivo y las tres muelas.”’ 
Ptyssophorus: zr0666, to fold; $opóz, bearing—in allusion to the complicated 
enamel folds of the lower molars. 
Pudu (subgenus of Coassus) Gray, 1852. Ungulata, Artiodactyla, Cervidze. 
Proc. Zool. Soc. London, for 1850, No. ccxvr, 242, Jan. 24, 1852; Cat. Ungulates 
Brit. Mus., 240, 1852 (raised to generic rank ). 
Pudua BRookE, Proc. Zool. Soc. Lond., 1878, 926-927. 
Type: Cervus humilis Bennett (= Capra pudu Molina), from Chile. 
Pudu: From the specific name, which is evidently based on a native South 
American name. 
Puelia Rorn, 1901. Ungulata, Ancylopoda, Homalodontotheriide. 
Revista Mus. La Plata, X, 252, Oct., 1901 (sep. p. 4). 
Type: Puelia plicata Roth, from the upper ‘Cretaceous’ of Lago Musters, Terri- 
tory of Chubut, Patagonia. 
