PLEUROLICUS—PLICATODON. 551 
Pleurolicus—Continued. 
Pleurolicus: zAevp&, side; @Aaé, GAakos (=atvAaé), groove*—in allusion to 
the lateral fissure of the upper molars. 
Pleuropterus Burnert, 1829. Insectivora, Galeopithecide. 
Quart. Journ. Sci., Lit. & Art, XXVII, 268, 269, Apr.—June, 1829. 
New name for Galeopithecus Pallas, 1780, which is considered inappropriate. 
Pleuropterus includes Galeopithecus rufus Geoffroy, from India and China; 
G. variegatus Geoffroy, from Java; and G. ternatensis Geoffroy, from the island 
of Ternate, Malay Archipelago. 
Pleuropterus: mAevpa, side; zrepóv, wing. 
Pleurostylodon AwrEcGniNo, 1897. Üngulata, Ancylopoda, Isotemnidze. 
La Argentina al través de las Ultimas Épocas Geológicas, 16, 1897 (nomen 
nudum); Bol. Inst. Geog. Argentino, XVIII, 485—486, fig. 66, Oct. 6, 1897. 
Species: Pleurostylodon modicus Ameghino, and P. minimus Ameghino, from the 
‘Cretaceous’ of Patagonia. 
Extinct. 
Pleurostylodon: mXevpor, side; 6t0Xos, pillar; 66@v=ddo0vs, tooth. 
Pleurystomus AMEGHINO, 1902. Ungulata, Litopterna, Notohippide. 
Bol. Acad. Nac. Cien. Córdoba, XVII, 14, May, 1902 (sep. p. 12). 
New name for Hurystomus Roth, 1901, which is preoccupied by Zurystomus Vieil- 
lot, 1816, a genus of Birds. 
Extinct. 
Pleurystomus: wAevpa, side; 6róua, mouth. 
Pleurystylops Amecuino, 1901. Ungulata, Amblypoda (Trigonostylopide). 
Bol. Acad. Nac. Cien. Córdoba, XVI, 394-395, July, 1901 (sep. pp. 48-49). 
Type: Pleurystylops glebosus Ameghino, from the ‘ Cretaceous’ of Patagonia. 
Extinct. 
Pleurystylops: wAevpd, side; 6rOXos, pillar; ow, aspect. 
Plexocherus AMEGHINO, 1886. Glires, Caviidee. 
Bol. Acad. Nac. Cien. Córdoba, IX, 58-63, 1886; Act. Acad. Nac. Cien., Cór- 
doba, VI, 250-253, pls. xx fig. 4, xxv figs. 1, 2, 5, 6, 11, 1889. 
Type: Hydrocherus paranensis Ameghino, from the Tertiary of Paraná, Argentina. 
Extinct. Based on last upper molars. 
Plexocherus: zAé&:5, plaiting, weaving; +-(Hydro-)cherus—in allusion to the 
arrangement of the enamel of the molars, which resembles that of Hydrocherus. 
Pliauchenia Corr, 1875. Ungulata, Artiodactyla, Camelidee. 
Proc. Acad. Nat. Sci. Phila., 1875, 258-259 (sep. issued as Palzont. Bull. No. 19, 
pp. 1-2, June 28); Hav, Cat. Foss. Vert. N. Am., Bull. 179, U. S. Geol. Surv., 
679, 1902 (type fixed). 
Species, from the Miocene of New Mexico: Pliauchenia humphreysiana Cope (type), 
and P. vulcanorum Cope, the latter from the Indian village of Pojuaque. 
Extinct. 
Pliauchenia: Pli-(ocene);+ +-Auchenia. 
Plicatodon Awraniwo, 1881. Ungulata, Perissodactyla, Rhinocerotidze? 
*La Antigüedad del Hombre en el Plata, II, 307, 1881" (fide AwEGniNo, Cont. 
Conocimiento Mamíf. Fósil. Repüb. Argentina, in Act. Acad. Nac. Cien., Cór- 
doba, VI, 500-502, pl. xxx fig. 4, 1889). 
Type: Plicatodon perrarus Ameghino, from the Rio de Areco and Rio de Lujan, 
Province of Buenos Aires, Argentina. 

* The second component of Pleurolicus is doubtful, but is evidently derived from 
some word meaning groove. The strict transliteration of the compound here indi- 
cated would be Pleurolacus. 
T Compare the corresponding prefixes Eo- and Mio-, indicating groups which existed 
in Eocene and Miocene times. 
