\ m 



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't "ill! 



468 



MONOGUAPnS OF NORTH .MRRICAN UODBNTIA. 



Maiont* oaruidmtii, Less., Mbii. i, 1*27, 258.— SciliNZ, Syn. Mnroni. ii, 1845, 91. 



Dipiu americanm, Baiiton, Amor. Philos. Traus. iv, No. xii, 17U9, 115 (plute. Dot numbered, opp. p. 134),— 



Barton, op. cit. vi, 1804, 143 (liabits).— Ord, Gutlirie'a Oeog. 'iA Am. ed. 1815, 202. 

 Uirionet amerkanus, Kit. CiiviKK, Dents des Mamm. 1835, 187, No. and pi. 75, Dkh, a, b (leoth. Name not 



formuUy presented, but iuferablo from tbu context), 

 Jaculu$ anericanut, Waglkr, NutUr). 8yat. Ampbib, 1830, 33. 

 Uerionet amerkanua, DkKay, N. Y. Zool. i, 1843, 70, pi. 34, f.3. 

 Dipus labradoriua, Tdktox, Syst. Nat. i, 1806, 99 (Labrador Rat of Pennant ).— Odd, Oiithrio's Geog. 8d 



Am. ed. 1815, 293. 

 Mm labradoriutfJ. SAniNK, App. Frankl. Jonrn. 1833, 601. 

 Otrbilliu labradorius, Hablan, Fn. Anier. 1835, 157 (after Sa&ine).— Godman, Am, Nat. Hist, i), Ist ed, 



1826, p. — ; 2d ed. 1831, 97 ; 3d ed. 1861, 97.— Ghikkith, Anim. Kint'd. v, 1887, 240, No. 635, 

 Dipiu )abradori(ms, Fischer, Syn. Mamm. 1H39, 3;i8. 

 Sleriona labradoriut, Riciiardsun, F. B.-A. i, 1839, 144, pi. 7.— Waunkii, Suppl. Schreb. iv, pi. 330 B 



(atkr Richardson).- Dawson, Ediub. N. Fbilos. Joiirn. new ser. iii, 1850, 3. 

 Uerionet labradoriu, SciiiNZ, Syn. Mamm. II, 1845, 93. 

 Jaculus labradoriut, Waukkr, Snpi)l. Scbreb. Hi, 1843, 394.— Gierel, Sung. 1855, 599 ; Zeltscbr. gesammt 



Naturw. xxv, 1865, 373 (osteology).— Kennicott, U. 8. Patent Ofllce Agrlc. Rep. for I8."i6, 



1857, 95, pi. 11 (habits).- Maximilian, Arch. Naturg. 1801, p. — ; Verz. ReisvN.-Am. 1863, 146. 

 Gerbillm sylvalicut, " Mitciiill " (descr. nnllu). 



MerioHet nemtyralit, Is. GKOVKRor, " Diet. Class. vll,323 ; pi. fasc. 10, n. 3 ", 

 GerbiUut dametii, Rafinesque, " Prdc Odcouv. Sdmlol. 14 ". 



t Gerbillut toricinxu, Rafinksque, " Prdc. Ddconv. S<$miol. 14".— Dksmarest, Mamm. ii, 1833, :<32 (com- 

 piled from RuQnesqne). — Lesson, Man. i, 1837, 357 (compiled from Raflncsi|no). 

 t Diput toricinut, Fiscber, Syn. Mamm. 1829, .339 (compiled from Rafliiesquc). 

 f GI«rM{(u< leonurut, Rafinesque, Am. Month. Mag. 1818, 440.— Desmarest, Mamm. ii, 1822, 322 (compiled 



from Ratlucsiinc). — Lesson, Man. i, 1837, 357 (compiled from liafinesqne). 

 f Diput leonurut, FiscnER, Syn. 1839, 339 (compiled from Raflnesqno). 

 f Gei-billut megalopt, Rafinf.8QUE, Am. Month. Mag. 1818, 446.— Desmarest, Mamm. ii, 1833, :I33 (compiled 



from Raflnesqno). — Lesson, Man. i, 1837, 357 (compiled from RnOnesqne). 

 f Diput megalopt, Fischer, Syn. 1839, 340 (compiled from Raflnesqne). 

 t Gerbillut viacrounit, Rafinesqur. 

 t Gerbillut bracbiiurut, Ravines<)CE. 

 iteritnet microcephalut, Harlan, Proc. Zool. Sec. Loud, vii, 18:19, 1. — Sciiinz, Syn. Mamm. ii, 1845, 98 



(compiled from Harlan). 

 Meriontt acadicui, Dawson, Edinb. N. Philos. Jouru. new ger. iii, 1856, 3, pi. 1. 

 Canada Rut, Pennant, Qnad, ii, 173. 



Labrabor Rat, Pennant, Hist. Qnad. 1781, 435, No. 305; Aral, Zool. i, 1784, 133, No. 6,3, 

 Jumping Moute of Canada, Da vies, I, o, 

 Labrador or Jumping Mnuie, Godman, 1. c. 

 Canadian Jerboa, Shaw, 1. c. 

 Labradore Jerboa, Turton, 1. o. 

 Canadian and Labrador (lerbil, Qrifpitr, I. c. 

 Deer Moute, DeKay, 1. c. 

 Gerbilte du Canada, Desmarest, 1. o. 

 MMone du Canada, Lesson, I. c. 



Gurbille loricine, dt la baie dl Hudson, queue de Uon, et anxtienx noirt, Lws., 1. o. 

 (7<iiia({i<cli«, Labradoritche, Kttinkiipfige HUpfmant, Schinz, I. c. 



DESCRIPTION. 



m 



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 jn the formulte 

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



