468 MONOGRAPHS OF NORTH AMERICAN RODENTIA, 



Meriones canadensis, Less., Man. i, L827, 258.— Schinz, Syn. Maram. ii, 1845, 91. 



Dipua americanus, Barton, a r. Philos. Trans. Lv, No. \ii, 1799, 115 (plate, not numbered, opp. p. 124). — 



Barton, op. cit. \i, 1604, 1 13 (habits).— Ord, Guthrie's Geog. 2d Am. ed. l«ir>, 292, 

 Mfrwnet aiiKiiraiiits, l'n. Cr\ ii i:, Units des Mainm. 1825, 187. No. and pi. 75, fi^s. a, b (teeth. Name not 



formally presented, bnt inferable from tin' context I. 

 Jaculus americanus, Wagler, Natiirl. Syet. Amphib. LH30, '-';;. 

 Meriones americanus, DeKay, N. V. Zool. i, 1842, 70, pi. 24, f.2. 

 Dipus labradorius, Turton, Syst. Nat. i, 1806, 99 (Labrador Eat of Pennant).— Ord, Guthrie's Geog. 2d 



Am. od. 1815, 292. 

 Mus labradorius, J. Sabine, A.pp. Frankl. Journ. 1823, 661. 

 Gerbillus labradorius, Harlan, Fn. Amer. 1825, 15? (alter Sabine).— Godman, Am. Nat. Hist, ii, 1st ed. 



1826, p. — ; 2d ed. 1831, 97 ; 3d ed. 1861, 97.— Griffith, Anim. Kiogd. v, 1827, 240, No. 625. 

 Dipus labradoricus, 1'isciir.i:, Syn. Mamm. 1*29, 338. 

 Meriones labradorius, Eichardson, F. B.-A. i, 1829, 144, pi. 7.— Wagner, Suppl. Schreb. iv, pi. 226 H 



(alter Eichardson).— Dawson, Edinb. N. Philos. Journ. new ser. iii, 1856, 2. 

 Meriones labradorus, Schinz, Syn. Mamm. ii, 1845, 92. 

 Jaculus labradorius, Wagner, Snppl. Sehreb. iii, 184:!, 294.— Giebel, Sang. L855, 599; Zeitschr. gesaramt. 



Naturw. xxv, L865, 272 (osteology).— Kennicott, U. S. Patent Office Agric. Rep. for 1836, 



1857, 95, pi. 11 (habits).— Maximilian, Arch. Naturg. 1861, p. — ; Verz. ReiseN.-Am. 1862, 146. 

 Gerbillus sylvaticus, " Mircnii.t, " (descr. nulla). 



Meriones nemoralis, Is. Gkoffroy, " Diet. Class. vii,323 ; pi. i'asc. 10, n. 2 ". 

 Gerbillus daviesii, Rafinesque, " Pr6c. Decouv. Sdmiol. 14 ". 



t Gerbillus soricinus, Rafinesque, " Prec. Decouv. Semiol. 14".— Desmarest, Mamm. ii, 1822, 322 (com- 

 piled from Rafinesque).— Lesson, Man. i, 1S27, 257 (compiled from Rafinesque). 

 f Dipus soricinus, Fischer, Syn. Mamm. 1829, 339 (compiled from Rafinesque). 

 t Gerbillus leonurus, Rafinksquk, Am. Month. Mag. 1818, 446. — Desmarf.st, Mamm. ii, 1822,322 (compiled 



from Kalinesqne). — Lesson, Man. i, 1827, 257 (compiled from Rafinesque). 

 I Dipus leonurus, Fischer, Syn. 1829, 339 (compiled from Rafinesque). 

 f Gerbillus megalops, Rafinesque, Am. Month. Mag. 1818, 446.— Desmarest, .Mamm. ii, 1822, 322 (compiled 



from Rafinesque). — Lesson, Man. i, 1827, 257 (compiled from Rafinesque). 

 f Dipus megalops, Fischer, Syn. 1829, :140 (compiled from Rafinesque). 

 / Gerbillus macrourus, Rafinesque. 

 f Gerbillus braohyurus, Rafinesque. 

 Meriones microcephalus, Harlan, Proc. Zool. Soc. Loud, vii, ls:i9, 1.— Schinz, Syn. Mamm. ii, 1845, 92 



(compiled from Harlan). 

 Meriones acadicus, Dawson, Edinb. N. Philos. Journ. new ser. iii, 1856, 2, pi. 1. 

 Canada Hat, Pennant, Quad, ii, 172. 



Labrabor Rat, Pennant, Hist. Quad. 1781, 435, No. 295; Arct. Zool. i, 1784, 132, No. 63. 

 ■Jumping Mouse of Canada, Davies, 1. c. 

 Labrador or Jumping Mouse, Godman, 1. c. 

 Canadian Jerboa, Shaw, 1. c. 

 Labradore Jerboa, Turton, 1. c. 

 Canadian and Labrador Gerbil, GRIFFITH, 1. c. 

 Deer Mouse, DeKay, I. c. 

 Gerhille du Canada, Desmarest, 1. c. 

 Me'rione du Canada, Lesson, 1. c. 



Gerbille snricine, de la bale d' Hudson, queue de lion, et auxyeux noirs, Less., 1. c. 

 Canadische, Labradoriscfie, Kleinkopjige BUpfmaus, Schinz, 1. c. 



DESCRIPTION. 



A. Cranial characters. — In comparison with the Murine forms with which 

 it has been associated, this animal presents many strong peculiarities of the 

 skull and teeth. Among these may be enumerated the presence of an addi- 

 tional tooth in the upper molar series, causing an inequality in the formulas 

 of the two jaws; the size and shape of the anteorbital foramen, with its 



