540 INDEX GENERUM MAMMALIUM. 
Pithecus—Continued. 
Lecons Anat. Comp., tabl. 1, 1800 (names only—‘Orangs,’ ‘ Pithecus’) ; GEOFFROY, 
Ann. Mus. Hist. Nat., Paris, XIX, 87-89, 1812. 
Type: The Orang-utan (Simia satyrus Linneeus), from Borneo. (See Simia Lin- 
n:eus, 1758.) 
Pithecus was previously used by Geoffroy & Cuvier, for a genus of Cercopithecidee. 
Pithelemur Lesson, 1840. . Primates, Lemurid:e. 
Spécies Mamm., 207, 208-209, 1840; Nouv. Tabl. Régne Animal, Mamm., 9, 1842. 
Type: Lemur indri Gmelin, from southern Madagascar. 
Name antedated by Indri E. Geoffroy, 1796; and by Lichanotus Iliger, 1811. 
Pithelemur: ai§nKos, ape; + Lemur. 
Pithes? Burner, 1828. Primates, Cercopithecidee. 
Quart. Journ. Sci., Lit. & Art, XXVI, 307, Oct.—Dec., 1828. 
Type: Pithes? sylvanus ( —Simia sylvanus Linneus?), from northern Africa. 
Pithes: i§né, ape. 
Pithesciurus (subgenus of Saguinus) Lesson, 1840. Primates, Cebid:e. 
Spécies Mamm., 116, 157-160, 1840. 
Pithesciureus Lesson, Nouv. Tabl. Régne Animal, Mamm., 7, 1842. 
I ithecosciurus AGAssiz, Nomenclator Zool., Index Univ., 1846, 295; 1848, 846. 
Type: Pithesciurus saimiri Lesson, from French Guiana. (See Saimiri Voigt, 1831.) 
Pithesciurus: mt§nk os, ape; +-Sciurus—i. e., a ‘squirrel monkey.’ 
Pithex Hopason, 1841. Primates, Cercopithecidee. 
Journ. Asiat. Soc. Bengal, IX, pt. II, for July-Dec., 1840, No. 108, pp. 1212-1213, 
1 fig. in text, Mar., 1841. 
Species: Pithex oinops Hodgson, and P. pelops Hodgson, from Nepal, India. 
Pithex: zi05&5, ape. 
Pitymys McMvnrniE, 1831. Glires, Murid:ze, Microtinee. 
Cuvier's Animal Kingdom, I, App., 434 footnote, 1831; MinrER, N. Am. Fauna, 
No. 12, pp. 15, 58-60, fig. 31, 1896. 
Pityomys Banas, Proc. Boston Soc. Nat. Hist., XXVIII, No. 7, p. 182, Mar., 1898. 
New name for Psammomys Le Conte, 1830, which is preoccupied by Psammomys 
Cretzschmar, 1828, a genus of Gerbilline. 
Pitymys: mitvs, zírvosc, pine; “0s, mouse 

Irom the habitat, although the type 
species is by no means restricted to pine woods. 
Placoziphius Van DENEDEN, 1869. Cete, Physeteride. 
[Quart. Journ. Geol. Soc. London, X X, 396, Nov. 1, 1864;* Bull. Acad. Roy. Sci. 
de Belgique, 2* sér., XXII, 107, 1866—nomen nudum]. 
Mém. Acad. Roy. Sci., Lettres et Beaux-Arts de Belgique, XXXVII [No. 4], 
11-12, pls. 1, 1, 1 fig. in text, 1869. 
Type: Placoziphius duboisii Van Beneden, from Edeghem, near Antwerp, Belgium. 
Extinct. Based on a skull. 
Placoziphius: mAGz, tlakos, plate; +Ziphius. 
Plagiarthrus AMEGHINO, 1896. Ungulata, Hyracoidea, Archaeohyracide. 
Bol. Inst. Geog. Argentino, X VII, ‘92’ footnote, 1896 (sep. p. 8); X VIII, 535- 
5306, fig. 21, Oct. 6, 1897. 
New name for Clorinda Ameghino, 1895, which is preoccupied by Clorinda Bar- 
rande, 1879, a genus of Brachiopoda. 
Extinct. 
Plagiarthrus: zÀA&y10c, oblique, slanting; &pfpov, joint. 
Plagiaulacodon FarcowEn, 1857. Allotheria, Plagiaulacidee. 
Quart. Journ. Geol. Soc. London, XL, pt. 3; Nos 515 5p: 262 A xg Paso 
Plagiaulacodon seems never to have been used strictly as a generic name, but was 
contracted to Plagiaulax. It occurs only in the description of Plagiaulax, in 
* Quoted by Huxley from Van Beneden’s paper, as ‘not yet published.’ 
