Acaremys, Sciamys, Erethizon. 
513 
5209. f minutus, Ameghino — (3789). 
5210. f minutissimus, Ameghino — (8790). 
5211. j-l<araikensis, Ameghino — (3791). 
5212. f tricarinatus. Ameghino — (3792). 
] ) 
f Eoeaen. Patagonia. 
.fEocaen. Patagonia. 
f Eoeaen. Patagonia. 
f Eoeaen. Patagonia. 
819. f Sciamys, Amegh., 1887. 
Ameghino, Enum. Sist. Mam. Fosil. Patag., 1887, p. 9. 
5213. f principalis, Ameghino — (3793). f Eoeaen. Patagonia. 
5214. -j- varians, Ameghino — (3794). fEocaen. Patagonia. 
5215. f robustus, Ameghino — (3795). fEocaen. Patagonia. 
5216. f tenuissimus, Ameghino — (57.96"). fEocaen. Patagonia. 
820. Erethizon, F. Cuv., 1822. 
Hystrix, p., L.; Echinoprocia, Gray, 1865; f Hystricops, Leidy, 1858. 
F. Cuvier, Mem. du Mus., IX, 1822, p. 425. 
5217. f venustus, Leidy — (3797). 
5218. f cloacinus, Cope — (3798); id., Journ. 
Acad. Nat. Se. Philad., 1899, p. 199. 
5219. dorsatus. Linne — (3799); Elliot, Field 
Oolumb. Mus, IT, 1901, p. 264, pl. 24. 
f dorsatus foss., Cope, 1. c., 1899, p. 198. 
a. - picinus, Bangs, Proc. N.-Engl. Zool. 
Club. 1900, p. 37. 
5220. epixanthus, Brandt — (3800); Elliot, 1. e., 
1901, p. 265. 
a. — couesi, Mearns — (3800 a); Elliot, 
1. e., p. 265. 
b. — myops, Merriaxn, Proc. W ash. Acad., 
1900, p. 27; Osgood. N.-Amer. Fauna, 
No 19, 1900, p. 38. 
c. — nigrescens, Allen, Bull. Amer. Mus., 
1903, p. 558. 
f Pleistocaen. 
Nebraska. 
f Pleistocaen. 
Pennsylvania. 
Canada Or., usque ad 
Saskatchewau, ad 
Maine. New Hamp- 
shire, Massachusetts. 
fPleistoc. Pennsyl- 
vania.. 
Labrador, 
(Lance au Loup). 
California, a Missouri 
Super, ad Novo- 
Mexico (in montibus), 
et Dnalaska. 
Arizona 
(Fort Whipple), 
Novo-Mexico. 
Ala, sica. (Regione 
Yukon, Portage 
Bay, White Pass). 
Columbia Britann. 
(ad fl. Shesley). 
i) Add.: Frotacaremys prior, P. avunculus, P. pulchellus, Ameghino, 
Bol. Acad. Cordoba, 1902, p. 111, 112. — Eoeaen. Patagonia. 
