PROTEMNOCYON——PROTHOATHERIUM. 579 
Protemnocyon Hartcner, 1902. Feree, Canidee. 
Mem. Carnegie Mus., I, 99-104, 105, pls. xv, xvin fig. 6, Sept., 1902. 
Type: Protemnocyon inflatus Hatcher, from the Oligocene (Oreodon beds) of Bad 
Land Creek, Sioux County, Nebraska. 
Extinct. Based on ‘a skull with lower jaw, atlas, axis, and third cervical found 
in position.’ 
Protemocyon: p06, before; +.Temnocyon—i. e., ancestral to Temnocyon of the 
John Day Miocene. 
Protemnodon Owen, 1873. Marsupialia, Macropodide. 
Proce. Roy. Soc. London, XXI, No. 141, p. 128, 1873; Phil. Trans. Roy. Soc. 
London, CLXIV, pt. 1, 274-281, pls. xxur figs. 4-9, xxiv figs. 13-16, xxv, XXxvI 
figs. 1-7, xxvir figs. 1-4, 10-14, 1874. : 
Species, 4: Macropus anak Owen (type?), Protemnodon og Owen, P. mimas Owen, 
and P. rechus Owen, from Darling Downs, Queensland, Australia. 
Extinct. 
Protemnodon: zpor£uvc,to cut short; 65@v—=dd0vs, tooth—in reference to the 
sectorial form of the anterior molar or premolar. 
Proteodidelphys AwxrcGuiNo, 1898. Marsupialia, Microbiotheriide. 
Revue Scientifique, 4* sér., X, 74, July 16, 1898; Sin. Geol.-Paleont., in Segundo 
Censo Nac. Repüb. Argentina, I, 187, 1898. 
Type: Proteodidelphys precursor Ameghino, from the ‘Cretaceous’ of Patagonia. 
Extinct. Based on ‘une branche mandibulaire presque intacte.’ 
Proteodidelphys: mp@ros, first; ~-EHodidelphys. 
Proterix M4rrHEW, 1903. Insectivora, Erinaceidz. 
Bull. Am. Mus. Nat. Hist., XIX, 227—229, fig, 1, May 9, 1903. 
Type: Proterix loomisi Matthew, from the Oligocene of South Dakota. 
Extinct. Based on the front half of a skull. 
Proterix: mp@cros, first; +- (Gal-) erix. 
Proterocetus AwEaniwo, 1899. Cete ( Proterocetidze). 
Sin. Geol.-Paleont., in Segundo Censo Nac. Repüb. Argentina, Supl, July, 
1899 (sep. p. 8). 
Type: Proterocetus palpabilis Ameghino, from the Guaranitic formation of the Rio 
Sehuen, Argentina. 
Extinct. 
Proterocetus: mporepos, earlier, before; «?jros, whale. 
Proterotherium Awrcnixo, 1883. Ungulata, Litopterna, Proterotheriid:e. 
Bol. Acad. Nac. Cien. Córdoba, V, entr. 3, pp. 291-293, 1883; Cont. Conocimiento 
Mamif. Fósil. Repüb. Argentina, in Act. Acad. Nac. Cien., Córdoba, VI, 
556-561, pls. xxxiii figs. 13-20, xxxiv figs. 11-18, Lxxr fig. 14, uxxi fig. 2, 1889. 
Type: Proterotherium cervioides Ameghino, from the barrancas del Paraná, Entre 
Rios, Argentina. 
Extinct. Based on part of the left upper jaw. 
Proterotherium: mporepos, before, earlier; 67píor, wild beast. 
Protheosodon AmEGHINO, 1897. Ungulata, Litopterna, Macraucheniide. 
La Argentina al través de las Ultimas Épocas Geológicas, 18, 1897 (nomen nudum); 
Bol. Inst. Geog. Argentino, X VIII, 453-454, fig. 39, Oct. 6, 1897. 
Type: Protheosodon coniferus Ameghino, from the ‘Cretaceous’ of Patagonia. 
Extinct. 
Protheosodon: p06, before; + Theosodon. 
Prothoatherium Amecuino, 1902. Ungulata, Litopterna, Proterotheriid:e. 
[Anal. Soc. Cien. Argentina, LI, 76, Mar.-Apr., 1901—nomen nudum. } 
Bol. Acad. Nac. Cien. Córdoba, X VII, 88-89, May, 1902 (sep. pp. 20-21). 
Species: Prothoatherium lacerum. Ameghino, and P. scamnatum Ameghino, from 
the Patagonian formation (Eocene) of Patagonia. 
Extinct. 
Prothoatherium: 7,6, before; -- Thoatherium. 
