Mus 869 



true outer tubercle on jfirst lamina ; second and third lamin;i' and 

 terminal heel normal and with no trace of supplemental tubercles 

 on outer side of crown. Second lower molar essentially like 

 second and third laminae of first, but with tubercles of posterior 

 lamina distinctly smaller than those of anterior lamina, and 

 terminal heel greatly reduced. Third lower molar with crown 

 area equal to about one-third that of second, its anterior lamina 

 with two tubercles smaller than those of posterior lamina of 

 second tooth, its terminal heel relatively better developed than 

 that of m'^. 



Bemarks. — Although occasionally straying to considerable 

 distances from houses, Mus vmscuJus is characteristically an 

 urban species, and its spread from central Asia to Evu-ope and 

 thence throughout the world has been chiefly due to human 

 agency. Two moderately well-marked local races occur on the 

 continent of Europe, while two more strongly differentiated 

 forms are confined respectively to St. Kilda Island and the 

 Faeroes. 



Mus MUSCULUS MUSCULUS LinUiVUS. 



1758. [Mils'] musculics Lianseus, Syst. Nat., i, 10th ed., p. 62 (Sweden). 



1801. lf[?ts] m[usctdus] albus Bechstein, Gemeinu. Naturgesch. Deutscb- 

 lands, I, 2d ed., p. 955 (Thiiringen, Germany). 



1801. M[us'] m[usculiis] flavus Bechstein, Gemeinn. Naturgesch. Deutsch- 

 lands, I, 2d ed., p. 955 (Thiiringen, Germany). 



1801. M[us] 7n[iisciilns] maculatus Bechstein, Gemeinu. Naturgesch. 

 Deutschlands, i, 2d ed., p. 955 (Thiiringen, Germany). 



1801. M[tis\ m[usculus] niger Bechstein, Gemeinn. Naturgesch. Deutsch- 

 lands, I, 2d ed., p. 955 (Thiiringen, Germany). 



1827. [Mus musculus'] striatus Billberg, Synopsis Faunae Scandinaviaj, 



]}. 6 (Siitlne, Sweden). 

 1827. [Mus musculus'] y albicans Billberg, Synopsis Faunre Scandinaviee, 



p. 6 (Sk&ne, Sweden), 

 1827. [Mus musculus] S nivcus Billberg, Synopsis Faunae Scandinavia, 



p. 6 (Molle, Norway). 

 1837. ?il/«s hrevirostris Waterhouse, Proc. Zool. Soc, London, p. 19 (Mal- 



donado, Uruguay). 

 1844. ^Dryviotnys 2>arvulus Tschudi, Fauna Peruana, p. 178 (Central Peru). 

 1857. Mus musculus Blasius, Siiugetbiere Deutschlands, p. 320. 

 1867. [Mas muscuhis] helvolus Fitzinger, Sitzungsber. kais. Akad. Wis- 



sensch. Wien, Matb.-Naturwiss. Classe, LVi, pt. i, p. 70 



(Hungary). 

 1867. [Mtis viusculus] varius Fitzinger, Sitzungsber. kais. Akad. Wissensch. 



Wien, Math.-Naturwiss. Classe, lvi, pt. i, p. 70 (Europe). 

 1807. [Mus musculus] cinerco-maculatus Fitzinger, Sitzungsber. kais. Akad. 



Wissensch. Wien, Math.-Naturwiss. Classe, lAi, pt. i, p. 70 



(Europe). 

 1869. Mus poschiavinus Fatio, Faunc Vert. Suisse, i, p. 207 (Poschiavo, 



Grisons, Switzerland). 



