858 RODENTIA 



3 6. Montenegro. (L. Fllhrer.) O. Thomas (p). 5. S. 4. 7-9. 



5 (5, 5 ?. Argostoli, Cephalonia, J. I. S. Whitaker (p). 8. 10. 1. 31-37. 



Greece. (C. Mottaz.) 40-42. 



3 (5, ? Kephissia, Athens. Hon. N. C. Roths- 8. 10. 2. 40-43. 



(C. JIo«a,?.) child (p). 



i, 9. Canea, Crete. A. Trevor Battve (p). S. 10. 24. 4-5. 

 (C. n. B. Grant.) 



EPIMYS NORVEGICUS Erxleben. 



1777. Mus norvegicns Erxleben, Syst. Regni Anim., i, p. 381 (Norway). 



1778. AIus decumanus Pallas, Nov. Spec. Quadr. Glir. Ord., p. 91 (Europe). 



1779. lf[Ms] surmolottits Severinus, Tentamen Zool. Huugaricae, p. 73 



(Central Europe). 

 1800. iH[Ms] d[ecuvianus\ Jnjbridus Bechstein, Pennant's Allgem. Ueber- 



sicht d. Vierfiiss. Thiere, ii, p. 713, described on p. 497. Walters- 



hausen, Germany (melauistic specimen). 

 ISlG. Mus caspius Oken, Lehrb. d. Naturgesch., in, pt. ii, p. 895. 



(Alternative for decumanus.) 

 1837. Mus hibcrnicus Thompson, Proc. Zool. Soc, Loudon, p. 52 (Rath- 



friland, Co. Down, Ireland). 

 1857. Mus decumayvus Blasius, Saugethiere Deutschlands, p. 313. 

 1900. Mus norvegicus Rehn, Proc. Biol. Soc, Washington, xiii, p. 1G7, 



October 31, 1900. 

 1908. Epimys norwrgicns Satunin, ilitth. Kauk. ilus., Tiflis, iv, Lief. 1-2, 



p. 111. 

 1910. Mits {Epimys) norvegicus and 3/. (E.) norvegicus hibcrnicus Trouessart, 



Faune jMamm. d'Europe, p. 142. 



Tijpe hifalitij. — Norway. 



Geographical dintrihution. — Original!}' confined to the north 

 temperate portions of the Old World ; now essentially cosmo- 

 politan through artificial dispersal. 



Diagnosis. — Skull with brain-case rather narrow, its gi'eatest 

 breadth across lateral ridges about etiual to length of j^ai'ietal 

 measured along ridge ; anterior upper molar with evident 

 cingulum at anterior border of crown ; first lamina of ni'^ with- 

 out distinct outer tubercle ; terminal heel of 7/*'- with no outer 

 tubercle ; first and second lower molars usually without evident 

 supplemental cusps at outer extremity of furrows ; form robust ; 

 tail decidedly shorter than head and body ; ear when laid forward 

 barely or not reaching eye ; hind foot of adult usually over 

 40 mm. in length, condylobasal length of adult skulls usually 

 45 to 54 mm. 



E.vtcrnul diaracfers. — Size larger and form more I'obust than 

 in E. rattns, the tail never as long as head and body. Ear short, 

 extending barely or not to e\^e when laid forward, its substance 

 thick and opac[ue, its surface densely covered with tine short 

 haii-s, its form not jjeculiar. Feet more robust than in E. rattns, 

 but proportions of toes and number and position of tubercles the 

 same. In size the tubei-cles are, howe^•er, relatively smaller than 



