ARVICOLA 405 



1910. Arvicola Halicvs Miller, Proc. Biol. Soc. Washington, 23, p. 20; 

 Troucssart, Faune Mamm. d'Europe, 1910, p. x; Miller, Catal. 

 Mamm. W. Europe, 1912, p. 740. 



Type. — Unknown. 



Type locality. — Vicinity of Pisa, Italy. 



Range. — Italian Switzerland and Northern Italy, southwards 

 at least as far as Pisa ; details of distribution not known. 



Characters. — Like A. t. terrestris, but teeth slightly larger, 

 anterior palatal foramina larger (both longer and broader), colour 

 not so dark and cheeks less contrasted with the surrounding parts. 



Colour of upper parts essentially as in A. t. terrestris, but 

 broccoli brown much in excess of black, the latter producing a 

 slight effect of grizzling or " lining," but never sufficiently 

 dominant to make the general colour approach seal brown. 

 Sides pale, buffy, slightly grizzled wood brown, becoming a little 

 more yellowish on cheeks. Under surface pale slate grey, washed 

 with buffy on chest and belly. Feet pale hair brown, sometimes 

 tinged with drab. Tail obscurely bicoloured, dark brown above, 

 greyish below. 



Skull presenting a close general resemblance to that oi A. t. 

 terrestris, but the auditory bullas are slightly larger and the 

 anterior palatal foramina are longer. The teeth are of normal 

 form, but slightly larger than in A. t. terrestris.^ 



For external and cranial measurements, see tables at end of 

 volume. 



Remarks. — I can find no good reason for regarding this animal 

 as more than a geographical race of A. terrestris, although I have 

 made close studies of its skull and dentition on two occasions 

 separated by an interval of many years. 



7c. Arvicola terrestris musignani de Selys-Lougchamps. 



1839. Arvicola musignani de Selys-Longchamps, Rev. Zoologique, 

 p. 8 (January 1839). 



1839. Arvicola destructor Savi, Nuovo Giorn. de'Lctterati, Pisa, 37, 

 No. 102, p. 204 (p. 7 of separate), February 1839 (for date of 

 publication see de Selys-Longchamps, ]5tudes de Micromammalogie, 

 1839, p. 90, footnote); described from Maremma Grossetana, 

 Tuscany, Italy; de S61ys-Longchamps, l^tudes de Micromam- 

 malogie, 1839, p. 93. 



1845. lArvicola musignani var. fuliginosus de Selys-Longchamps, 

 Atti della sesta Riunione degli Scienziati Italiani, Torino, 1844, 

 p. 322 {nomen nudum). 



1857. Arvicola amphihius b, Blasius, Siiugethiere Deutschland, p. 344. 



1910. Arvicola musignani Miller, Proc. Biol. Soc. Washington, 23, 

 p. 21 ; Catal. Mamm. W. Europe, 1912, p. 744. 



1910. Arvicola musignanoi Trouessart, Faune Mamm. d'Europe, pp. x, 

 196. 



^ Miller inadvertently makes conflicting statements about the teeth 

 of this form; in his diagnosis (Catalogue, p. 240), he says teeth " not so 

 heavy " as in A. terrestris, but on p. 741 " teeth as in A. terrestris, butslightly 

 larger." The latter statement is correct. 



