PRONESODON—PROPHALANGISTA. Dio 
Pronesodon AmMEGHINO, 1895. Ungulata, Toxodontia, Nesodontide. 
Bol. Inst. Geog. Argentino, XV, cuad. 11-12, pp. 626-628, 1895 (sep. pp. 26-28). 
Species: Pronesodon cristatus Ameghino, and P. robustus Ameghino, from the 
Pyrotherium beds in the interior of Patagonia. 
Extinct. 
Pronesodon: 70, before; -- Nesodon. 
Propachynolophus (subg. of Pachynolophus) Lemoinn, 1891. Ungulata, Equidee. 
Bull. Soc. Géol. de France, 3° sér., XIX, No. 5, pp. 285, 286, pl. x1 fig. 115, 
May, 1891. 
Type: Propachynolophus gaudryi Lemoine, from the lower Eocene near Reims, 
France. 
Extinct. Based on teeth. 
Propachynolophus: 2p0, before; +-Pachynolophus. 
Propachyrucos AMEGHINO, 1897. Ungulata, Typotheria, Hegetotheride. 
La Argentina al través de las Ultimas Epocas Geológicas, 6, 17 footnote, 1 fig. in 
text, 1897; Bol. Inst. Geog. Argentino, X VIII, 425-426, fig. 11, Oct. 6, 1897. 
Species: Propachyrucos smith-woodwardi Ameghino, and P. crassus Ameghino, from 
the ‘Cretaceous’ of Patagonia. 
Extinct. 
Propachyrucos: 7p0, before; +-Pachyrucos. 
Propalehoplophorus AmEGHINO, 1887. Edentata,Glyptodontid:e( Hoplophoridz). 
Enum. Sist. Especies Mamíf. Fós. Patagonia Austral, 24-25, Dec., 1887. 
Species: Hoplophorus australis Moreno, and Propalxhoplophorus incisivus Ameghino, 
from the lower Tertiary of southern Patagonia. 
Extinct. 
Propalehoplophorus: mp0, betore; + Palxhoplophorus. 
Propaleomeryx LvpkkkEn, 1883. Ungulata, Artiodactyla, Cervide. 
Paleeontologia Indica (Mem. Geol. Surv. India), ser. 10, II, pt. v, 173-174, fig. 
2 in text, Feb., 1883 (provisional name). 
Type: Propalcomeryx sivalensis Lydekker, from the Pliocene of the sub-Himalayan 
Siwaliks, near Rürki, India. 
Extinct. Based on a left upper molar. 
Propalxomeryx: po, before; -- Palzomeryx. 
Propaleotherium Gervais, 1849. Ungulata, Perissodactyla, Paleeotheriide. 
Comptes Rendus, Paris, X XIX, 385, July-Dec., 1849; Mém. Acad. Sci. Mont- 
pellier, I, pt. 4, p. 400, 1850; Zool. et Paléont. Francaises, 2* éd., 115-117, 1859. 
Type not stated in the first description. Based on remains of Pal«otherium, from 
France. ‘‘ Les Palwothériums eux-mémes, . . . ne sont pas de vrais Paleo- 
thériums . . . Ils doivent constituer un genre à part, . . . et prendront 
le nom de Propalxotherium.’’ In 1859 two species were included: Pal:eotherium 
isselanum Cuvier, from Issel (Dépt. Aude), and Propalxotherium argentonicum 
Gervais, from Argenton (Dépt. Indre), France. 
Propalzotheriwm: mp0, before; 4-Palxotherium. 
Properiptychus AMEGHINO, 1897. Ungulata, Amblypoda, Periptychidee? 
La Argentina al través de las Ultimas Epocas Geológicas, 18 footnote, 1897; Bol. 
Inst. Geog. Argentino, X VIII, 459-440, fig. 24, Oct. 6, 1897. 
Type: Properiptychus argentinus Ameghino, from the ‘Cretaceous’ of Patagonia. 
Extinct. 
Properiptychus: 700, before; --Periptychus. 
Prophalangista Harckren, 1895. Marsupialia, ? 
Syst. Phylogenie Wirbelth., III, 466, 1895. 
Hypothetical genus, including the herbivorous marsupials from the Jura. 
Prophalangista: x0, betore; +-Phalangista. 
