-( 
m 
PROHYRACOTHERIUM— —PROMEG ATHERIUM. 5 
Prohyracotherium—Continued. 
Species, 3: Prohyracotherium patagonicum Ameghino, P. matutinum Ameghino, and 
and P. medialis Ameghino, from the Notostylops beds of Patagonia. 
Extinct. 
Prohyracotherium: 750, before; -- Hyracotherium. 
Prolagopsis Fonsvru Mason, 1899. Glires, Ochotonid:e. 
Trans. Linn. Soc. London, 2d ser., Zool., VII, pt. 9, p. 511, Nov., 1899. 
**A hypothetical ‘ Prolagopsis? descended from Titanomys or some closely related 
form with persistent lower m. 3."  (FonsvrH Maxon.) 
Prolagopsis: zó before; -- Lagopsis. 
Prolagostomus AMEGHINO, 1887. Glires, Chinchillid:e. 
Enum. Sist. Especies Mamíf. Fós. Patagonia Austral, pp. 11-12, Dec., 1887. 
Species, 4: Prolagostomus pusillus Ameghino, P. divisus Ameghino, P. profluens 
Ameghino, and P. imperialis Ameghino, from the lower Tertiary of southern 
Patagonia. 
Extinct. 
Prolagostomus: 70, before; +-Lagostomus. 
Prolagus Powzr, 1853. Glires, Ochotonide. 
Cat. Méth. Vert. Foss. Bassin de la Loire, 43, 1854; Gervais, Zool. et Paléont. 
Frangaises, 2° éd., 51, 1859; FonsvrH Masor, Trans. Linn. Soc. London, 2d 
ser., Zool., VII, pt. 9, pp. 449-460, pls. 36-38, several figs, Nov., 1899. 
Type: Lagomys sansaniensis Lartet, from the Miocene of Sansan, Gers, France. 
Extinct. 
Prolagus: z0, before; Aay @s, hare. 
Prolemur (subgenus of Hapalemur) Gray, 1870. Primates, Lemurid:e. 
Proc. Zool. Soe. London, 1870, 828-831, pl. rrr, 4 figs. in text; Cat. Monkeys, 
Lemurs & Fruit-eating Bats Brit. Mus., 131, 133, 1870. 
Type: Hapalemur simus Gray, from Madagascar. 
Prolemur: mp0, before; + Lemur. 
Prolepus Hevupr, 1898. Glires, Leporid:e. 
Mém. Hist. Nat. Empire Chinois, IV, pt. 2, p. 65, 1898. 
Name suggested, but not used, for a hypothetical ancestral form of Leporid:e, ‘‘les 
dents caduques des Léporidés sont les dents ancestrales du Protolagos ou du 
Prolepus, et si cette béte ancestrale n'est pas une pure abstraction générique, 
cette forme léporide est concréte et doit se retrouver dans les couches géolo- 
giques anciennes, décomposées en bas, réunies en haut."  (Hkvpk.) 
Prolepus: 700, before; -4- Lepus. 
Prolicaphrium AmEGHiINo, 1902. Ungulata, Litopterna, Proterotheriid:e. 
[Anal. Soc. Cien. Argentina, LI, 76, Mar.-Apr., 1901—nomen nudum. ] 
Bol. Acad. Nac. Cien. Córdoba, XVII, 86-88, May, 1902 (sep. pp. 18-20). 
Species, 3: Prolicaphrium specillatum Ameghino, P. spectabile Ameghino, and P. 
festinum Ameghino, from the Patagonian formation ( Eocene) of Patagonia. 
Extinct. 
Prolicaphrium: 70, before; + Licaphrium. 
Promegatherium Awxraniwo, 1883. Edentata, Megatheriid:e. 
Bol. Acad. Nac. Cien. Córdoba, V, entr. 3, pp. 293-297, 1885; Cont. Conocimiento 
Mamíf. Fósil. Repüb. Argentina, in Act. Acad. Nac. Cien., Córdoba, VI, 677— 
680, 921, pls. xxxvii figs. 7-9, Lxxvi fig. 2, 1889. 
Type: Promegatherium smaltatus Ameghino, from the barrancas del Paraná, Entre 
Rios, Argentina. 
Extinct. Based on a single molar. 
Promegatherium: 7,0, before; -- Megatherium. 
