PROTOREODON—PROTOTALPA. 585 
Protoreodon—Continued. 
Type: Protoreodon parvus Scott & Osborn, from the Eocene ( Uinta beds) of White 
River, northeastern Utah. 
Extinct. 
Protoreodon: mp@tos, first; + Oreodon. 
Protorhea Moreno & Mercerat, 1891. Ungulata, Artiodactyla, Camelid:e. 
Anal. Mus. La Plata, I, 27, 69, pl. xrx fig. 17, 1891; AwxaurNo, Rev. Argentina, 
I, entr. 6a, p. 448, Dec., 1891. 
Type: Protorhea azarae Moreno & Mercerat, from the Pampean formation of 
Monte Hermoso, about 40 miles east of Bahia Blanca, Province of Buenos Aires, 
Argentina. Described as a species of bird (Struthiones), but subsequently 
claimed to be based on remains of Auchenia lujanensis. (AMEGHINO.) 
Extinct. Represented by an imperfect left femur, several phalanges of the foot, 
and a terminal phalanx. 
Protorhea: mp@vos, first; +-Rhea—in allusion to the fact that the bones were 
originally supposed to be those of a primitive Rhea. 
Protorohippus Worrman, 1896. Ungulata, Perissodactyla, Equid:e. 
Bull. Am. Mus. Nat. Hist., N. Y., VIII, art. vr, pp. 91-93, 104-105, figs. 14, 15 in 
text, May 12, 1896. 
Type: Hyracotherium venticolum Cope, from the Eocene (Wind River beds) of 
Wyoming. 
Extinct. 
Protorohippus: zp&ros, first; + Orohippus. 
Protoryx Fonsvru Mason, 1891. Ungulata, Artiodactyla, Bovidee. 
Comptes Rendus, Paris, CXIII, No. 18, pp. 608, 609, Séance Nov. 2, 1891. 
Species, 4: Protoryx caroline Major, P. longiceps Major, P. gaudryi Major, and P. 
hippolyte Major, from the upper Miocene of the island of Samos, Greece. 
Extinct. 
Protoryx: mp@ros, first; + Oryx. 
Protoselene Marruew, 1897. Ungulata, Condylarthra, Miocleenidee. 
Bull. Am. Mus. Nat. Hist., N. Y., IX, 317-319, figs. 19-20, Nov. 16, 1897. 
Type: Mioclznus opisthacus Cope, from the Eocene (Torrejón) of New Mexico. 
Extinct. Based on upper and lower jaws and some skeleton fragments. 
Protoselene: zp&rosz, first; 6£À5v5, crescent—in allusion to the molar cusps, 
which ‘‘show a departure from the rounded form in the direction apparently 
of selenodontism."  (MarrHEw.) 
Protosimia AMEGHINO, 1884. Primates, 
Filogenia, 382, 1884; Cont. Conocimiento Mamif. Fósil. Repüb. Argentina, in 
Act. Acad. Nac. Cien., Córdoba, VI, 98, 1889. 
Hypothetical genus: ‘Primer antecesor del orangutan.’ 
Protosimia: mp@ros, first; -- Simia. 
9 
Protosirena Ha4EckEr, 1895. Sirenia, 
Syst. Phylogenie Wirbelth., III, 466, 566, 1895. 
Hypothetical ancestor of the Sirenia. 
Protosirena: mp@ros, first; Geipnv, siren—i. e., a primitive sirenian. 
Protosorex Scorr, 1895. Insectivora, Soricid:e. 
Proc. Acad. Nat. Sci. Phila., for 1894, 446—448, Jan. 22, 1895. 
Type: Protosorer crassus Scott, from the Oligocene (White River) of the Bad 
Lands of South Dakota. 
Extinct. Based on 'the facial region and mandible, with nearly complete 
dentition.' 
Protosorex: m Grosc, first; +-Sorex. 
Prototalpa (see Protalpa). Insectivora, Talpidz. 
