672 



RODBNTIA 



material representing the marsh-inhabiting animal to which the 

 name levernedii was originally applied is too meagre to permit 

 any final decision as to the identity of this form with that 

 occurring in Switzerland. The brain-case in the type as well as 

 in the five other sjaecimens examined is of the elongated form 

 characteristic of the Alpine race as compared with true agrestis. 

 The hind foot, however, appears to be rather constantly larger 

 than in the Swiss animal. Eventually it may prove that the 

 name levernedii must be restricted to this semi-aquatic vole, in 

 which event the name niger of Fatio would be available for the 

 Swiss form. 



4 6. St. Gilles, Gard, France. G. S. Miller (c). 8. 8. 4.233-236. 



6. Montauban, Haute-Savoie, 0. Thomas (p). 6. 4. 2. 7. 



900 m. {A. Robert.) 



6,9. C r a n V e s - Sales, Haute- A. Robert (c & p). 5. 4. 9. 8-9. 

 Savoie, 900 m. 



5 &, ?. Cranves-Sales, Haute-Savoie, 0. Thomas (p). 5. 11. 8. 24-27, 



1200 m. {A. Robert.) 29, 82. 



?. Lucinges, Haute-Savoie, 0. Thomas (p). 6.4.2.7-8. 



900 m. (A. Robert.) 



9. Etupes, Doubs. (C. Mottaz.) 0. Thomas (p). 8. 8. 10. 115. 



2. Meiringen, Berne, Switzer- Tomes Collection. 7. 1. 1. 139-140. 



land. 



1. Oberholsen Valley. Tomes Collection. 7. 1. 1. 138. 



MiCROTUS AGRESTis BAiLLONi de Selys-Longchamps. 



1841. Arvlicola] baillonide S61ys-Longchamps, Atti della seconda Riunione 



degli Scienziati Italiani, Torino, 1840, p. 225 (Northern France ; 



Abbeville, Somme, from context). 

 1845. ? Alrvicola] intermedia Bonaparte, Atti della sesta Riunione degli 



Scienziati Italiani, Torino, 1844, p. 350 (cited as doubtful synonym 



of bailloni, with de Selys-Longchamps as authority). Nomen 



nudum. 

 1857. Arvicola agrestis a. Blasius, Saugethiere Deutschlands, p. 369 (part). 

 1896. Microtus agrestis neglectus Barrett-Hamilton, Proc. Zool. Soc, 



London, p. 602 (part). 

 1910. Microtus agrestis neglectus Trouessart, Faune ]\Iamm. d'Europe, 



p. 176 (part). 



Type locality. — Abbeville, Somme, France. 



Geographical distribution. — Western Continental Europe from 

 the shores of the Baltic southward into central Germany and 

 south-western France. Southern and eastern limits of range not 

 known. 



Diagnosis. — Simiiar to Microtus agrestis agrestis but smaller 

 (hind foot, 17 to 18 "6 mm.; cotidylobasal length of skull in 

 largest individuals, 24 • 5 to 26*6 mm.) ; skull with brain-case 

 tending to assume ^ulie narrower form characteristic of M. agrestis 

 levernedii. 



Measurements^' — Adult male from Hillerod, Zealand, Denmark : 

 head and body, 113; tail, 3i) ; hind foot, 18- 2; ear, 13-5. 



