APODBMDS 829 



the latter may always be distinguished by their larger, smoothly 

 rounded brain-case (a character which persists to extreme old 

 age), relatively deeper rostrum, and larger teeth. 



Teeth. — In all respects, except for their slightly larger size, 

 the teeth resemble those of Apodemus sylvaticus. 



Bemarks. — The large general size, long hind foot, and massive, 

 angular skull serve to distinguish adults of this species from 

 individuals of Apodemus sylvaticus. Immature specimens are, 

 on the contrary, difficult to determine. The relatively limited 

 distribution of the large animal and the fact that it is not yet 

 known to occur on any of the small islands where A. sylvaticug 

 has been found, are both circumstances which suggest the 

 probability that Apodemus flavicollis has entered western Europe 

 more recently than the small species. Members of the group 

 occur in the Himalayas ; but it is not known how much further 

 east their range extends. 



Apodemus flavicollis flavicollis Melchior. 



1834. Mus flavicollis Melchior, Den Danske Staats og Norges Pattedyr, 

 p. 99 (Sielland, Denmark). 



1862. ? \Mus sylvaticus] vrt. major Radde, Reisen im Siiden von Ost- 

 Sibirien, i, p. 180 (Bureja Mountains). Part, specimens mentioned 

 from Crimea which are probably this form. 



1866. Mus cellarius J. F. Fischer, Zool. Gart., vn, p. 153, April, 1866 

 (near Luga, St. Petersburg, Russia). 



1874. Mus sylvaticus Lilljeborg, Sveriges og Norges Ryggradsdjur, i, p. 263 

 (description based on the large animal). 



1894. Mus flavicollis de Winton, The Zoologist, 3rd ser., xviii, p. 441, 

 December 1904 (part). 



1900. Mus sylvaticus typicus Barrett-Hamilton, Proc. Zool. Soc, London, 

 p. 404. Not Mus sylvaticus Linnreus. 



1900. Mus sylvaticus princeps Barrett-Hamilton, Proc. Zool. Soc, London, 

 p. 408 (Bustenari, in the Carpathians, N.W. of Bucharest, 

 Roumania. Altitude 480 m.). Type in British Museum. 



1910. Mus sylvaticus and M. sylvaticus princeps Trouessart, Faune Mamm. 

 d'Europe, pp. 149, 153. 



Type locality. — Sielland, Denmark. 



Geographical distribution. — Continental range of the species. 



Diagnosis. — White of underparts usually pure and without 

 much suffusion of slaty ; chest spot frequently not forming 

 complete collar. 



Measurements. — Four adults from Medelpad, Sweden : hind 

 foot, 25, 25, 25 and 26. Adult male and female from Hillerod, 

 Zealand, Denmark: head and body, 104 and 103; tail, 111 and 

 104; hind foot, 25 and 24; ear from meatus, 17 and 17 -5. 

 Adult male from Nysted, Lolland, Denmark : head and body, 

 100; tail, 132; hind foot, 27. Average and extremes of five 

 adults from Caterille, Haute-Garonne, France : head and body, 



