HYDROCHCERUS. OCHOTONA. 365 



Genus 182. Hyclrochoerus. 



Hydrochoerus Brisson, Regn. Anim., 2d ed., 1762, pp. 12, 80-81. 

 Type Hydrochoerus hydrochcerus Brisson =:Sus hydrochceris! 

 Linnaeus. 



628. Hydrochoerus hydrochoerus (Linnaeus). 



Sus hydrochceris! Linn., Syst. Nat., i, 1766, p. 103. 

 Hydrochcerus capyhara Erxleben, Syst. Regn. Anim., 1777, p. 

 193. Wagn., Schreb. Saugth., Sappl., iv, 1844, p. 56, pi. 

 174. Tschudi, Faun. Peru., 1844, p. 194. Waterh., Mamm., 

 II, 1848, p. 201, pi. 5, fig. 2. Flower, Proc. Zool. Soc., 1884, 

 p. 252. 

 Capybara Water-hog. 



I. Adult — P. South America! Ward's Nat. Scien. Establ., 

 Rochester, N. Y. 



SUBORDER IL DUPLICIDENTATA. 



Family XX. Ochotonidse. 



Genus 183. Ocliotona. Pikas, Chief Hares. 



Ochotona Link, Zool. Beitr. Naturg., i, Pt. 11, 1795, p. 74. Type 

 undetermined. 

 Lagomys Storr, Prodr. Meth. Mamm., 1780, pp. 39-40, tab. b. 

 Ogotoma Gray, Ann. Mag. Nat. Hist., 3d Ser., xx, 1867, p. 220. 



629. Ochotona princeps (Richardson) . 



Lepus princeps Richards., Zool. Jour., iii, 1828, p. 520. 

 Ochotona princeps Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 

 1901, p. 267, fig. 61. Zool. Ser. Id. Check-L. Mamm. N. 

 Amer. Cont. & W. Indies, F. C. M. Pub., vi, 1905, p. 338. 

 Zool. Ser. 

 Chief Pika. 



1-2. Adult 9 P. Canadian Nat. Park, Alberta, Canada. G.F.Dippi^. 

 3-6. Adult d^ P. CanadianNat. Park, Alberta, Canada. G. F.Dippie. 

 7-8. Adult 6" P. Banff, Alberta, Canada. G. F. Dippie. 

 9-10. Adult ? P. Banff, Alberta, Canada. G. F. Dippie. 



630. Ochotona schisticeps (Merriam). 



Lagomys schisticeps Merr., N. Am. Faun., No. 2, 1889, p. 11. 



