PROTYLOPUS——PSAMMOMYS. 587 
Protylopus Worrman, 1898. Ungulata, Artiodactyla, Camelidee. 
Bull. Am. Mus. Nat. Hist., X, 104-110, pl. x1, fig. a; text figs. 3-6, Apr. 9, 1898. 
Type: Protylopus petersoni W ortman, from the upper Eoceneof the Uinta Basin, Utah. 
Extinct. *'Primarily founded upon the anterior portion of a skull from which 
the left ramus is missing.”’ 
Protylopus: 06, before; róAz, swelling, pad; zovs, foot—i. e., a primitive Tylo- 
pod or Cameloid. The name was evidently suggested by the subordinal term 
Tylopoda. 
Protypotherium Awraniwo, 1882. Ungulata, Typotheria, Interatheride. 
““Cat. de la prov. de Buenos Aires en la Expd. Cont. Sud-Amer., Mar. 1882;”’ 
* Bol Inst. Geog. Argentino, June, 1882" (fide AmmGHINO, 1889); Cont. 
Conocimiento Mamif. Fósil. Repüb. Argentina, in Act. Aczd. Nac. Cien., Cór- 
doba, VI, 474—480, pis. xiv figs. 6-22, pl. xv fig. 1, 1889. 
Type: Protypotherium antiquum Ameghino, from the barrancas del Paraná, Entre 
Rios, Argentina. 
Extinct. Based on a right mandible, the last four molars, and part of the 
alveolus of p. 3. 
Protypotherium: 70, before; +-Typotherium. 
Proviverra Riitimeyer, 1862. Creodonta, Proviverride. 
Neue Denkschrift. Allgem. Schweiz. Gesellsch. gesammt. Naturwiss., Zürich, 
XIX, 80-86, Tab. v, figs. 82-85, 1862. 
Type: Proviverra typica. Rütimeyer, from the Eocene of Egerkingen, near Solo- 
thurn, Switzerland. 
Extinct. Based on the greater part of a skull. 
Proviverra: T0, before; + Viverra. 
Prox OaiLBy, 1837. Ungulata, Artiodactyla, Cervide. 
Proc. Zool. Soc. London, for 1836, No. xrvrm, 135, June 27, 1837. 
Type: Prox moschatus Ogilby (=Cervus muntjak Zimmermann), from Java. 
Name antedated by Muntiacus Rafinesque, 1815. 
Prox: 750068, deer (perhaps Cervus capreolus) . 
Prozaedius AmEGHINO, 1891. Edentata, Dasypodide. 
Nuevos Restos Mamif. Fós. Patagonia Austral, 41, Aug., 1891; LvDpEKKER, Zool. 
Record for 1891, XXVIII, Mamm., 52, 1892 (type fixed). 
Prozaedyus Ameghino, Revista Argentina Hist. Nat., I, entr. 5a, 327, Oct. 1, 1891. 
Species, 3: Zaedius proximus Ameghino (type), Z. exilis Ameghino, and Z. mini- 
mus Ameghino, from the Eocene of southern Patagonia. 
Extinct. 
Prozaedius: 750, before; -- Zaedyus. 
Prozoziphius (see Proroziphius). Cete, Dbyseteride. 
Psammomys CrerzscuMar, 1828. Glires, Murid:e, Gerbilline. 
CnETZSCHMAR, in Rüppel's Atlas zur Reise nórdl. Afrika, Iste Abth., Zool., 
Heft xr, 56-59, Tab. 22-23, 1828.* 
Type: Psammomys obesus Cretzschmar, from Alexandria, Egypt. 
Psammomys: wcyuj.os, sand; 0s, mouse. 
Psammomys Le Contes, 1830. Glires, Muridee, Microtinze. 
Ann. Lyc. Nat. Hist. N. Y., III, for 1829, 132-133, 1830 (read Dec. 21, 1829); 
MiLLER, N. Am. Fauna No. 12, pp. 15, 58, 1896 (in synonymy). 
Type: Psammomys pinetorum Le Conte, from the vicinity of Riceboro, Georgia. 
Name preoccupied by Psammomys Cretzschmar, 1828. Replaced by Pitymys 
MeMurtrie, 1831; Ammomys Bonaparte, 1831; and Pinemys Lesson, 1836. 
Psammomys Peprric, 1835. Glires, Octodontid:e. 
** Reise in Chile, Peru, etc., 1827-32, I, 166, 1835” (fide Wreamann, Archiv Natur- 
gesch., 1835, Bd. I, 252 footnote); WarERHOvsE, Nat. Hist. Mamm., II, Roden- 
tia, 269, 1848 (in synonomy ). 

* For date of publication, see Oken's Isis, 1829, p. 1291. 
