589 INDEX GENERUM MAMMALIUM. 
Protodelphinus Harcken, 1895. Cete, Delphinidee ? 
Syst. Phylogenie Wirbelth., ITI, 466, 566, 1895. 
Hypothetical genus, apparently the supposed ancestor of the dolphins. 
Protodelphinus: mp@tos, first; -}+Delphinus. 
Protodichobune Lemoine, 1891. Ungulata, Artiodactyla, Anoplotheriidze. 
Bull. Soc. Géol. de France, 3° sér., XIX, No. 5, pp. 287—288, pl. x1 figs. 132-143, 
May, 1891. : 
Species: Protodichobune oweni Lemoine, and P. lydekkeri Lemoine, from the lower 
Eocene near Reims, France. 
Extinct. ‘‘Il est représenté dans la faune agéienne par des dents assez nom- 
breuses.”’ 
Protodichobune: mp@ros, first; +-Dichobune. 
Protogaulus Riaas, 1899. Glires, Seiuridze: 
Field Columbian Mus., Pub. 34, Geol. ser., I, No. 4, pp. 183-184, 1 fig. in text 
Mar., 1899; Hav, Science, new ser., X, 253, Aug. 25, 1899. 
Type: Meniscomys hippodus Cope, from the Miocene (John Day) of Oregon. 
<xtinet. Based on the dentition of both jaws and portions of the cranium. 
Protogaulus: z Gros, first; --( Myla-)gaulus. 
Protogenia (see Protogonia), Ungulata, Condylarthra, Phenacodontide. 
Protoglyptodon Amrcurno, 1885. Zdentata, Glyptodontide. 
Bol. Acad. Nac. Cien. Córdoba, VIII, entr. 1, pp. 135-137, 1885; Cont. Conoci- 
miento Mamif. Fósil. Repüb. Argentina, in Act. Acad. Nac. Cien., Córdoba, 
VI, 838-839, pls. Liv fig. 6, vri fig. 7, 1889. 
Type: Protoglyptodon primiformis Ameghino, from the barrancas del Paraná, 
Argentina. 
Extinct. Based on part of the carapace composed of several scutes. 
Protoglyptodon: mp@cos, first; — Glyptodon. 
Protogonia Corr, 1881. Ungulata, Condylarthra, Phenacodontide. 
** Palzeeont. Bull., No. 33, pp. 492-493, Sept. 30, 1881;" Proc. Am. Philos. Soc., 
XIX, 492-493, Oct. 21, 1881. 
Protogenia DovviLLE, Ann. Géol. Univ., Paris, for 1891, VIII, 4° fasc., 644, Apr., 
1893. 
Type: Protogonia subquadrata Cope (=Phenacodus puercensis Cope*), from the 
lowest Eocene of New Mexico. 
Name preoccupied by Protogonius Hübner, 1816, a genus of Lepidoptera. 
Replaced by Euprotogonia Cope 1893. (See Tetraclenodon Scott, 1892.) 
Extinct. ‘ Probably two specimens; one supporting three superior molars, the 
other including damaged superior molars and the last two inferior molars." 
Protogonia: mp@vos, first; ya@via , corner, angle. 
Protogonodon Scorr, 1892. Ungulata, Condylarthra, Phenacodontid:e. 
Proc. Acad. Nat. Sci. Phila., Nov. 29, 1892, 322. 
Type: Mioclenus pentacus Cope, from the Puerco Eocene of New Mexico. 
Extinet. 
Protogonodon: Protogonia; 65@v = ddo0vs, tooth—-in allusion to resemblance of 
the lower molars to those of Protogonia. 
Protohippus (subg. of Equus) Lgrpv, 1858. Ungulata, Perissodactyla, Equidee. 
Proc. Acad. Nat. Sci. Phila., 1858, 26-27; Journ. Acad. Nat. Sci. Phila., 2d ser., 
VII, 275-279, 401, pls. xvir figs. 1,2, xvi figs. 39,40, xxvir, figs. 3-7, 1869 
(raised to generic rank). 
Prohippus HgvpE. Mém. Hist. Nat. Empire Chinois, II, pt. 2, 167, 1894 (misprint). 
Type: Equus ( Protohippus) perditus Leidy, from a Miocene deposit in the valley 
of the Niobrara River, Nebraska. 

*Fide Matthew Bull. Am. Mus. Nat. Hist. N. Y., IX, 303, 1897. - 
