752 RODENTIA 



Measurements. — Avei'age and extremes of four adults from 

 Caterille, Haute - Garonne, France: head and body, 147 "2 

 (145-150); tail, 60-8 (59-67); hind foot, 24-3 (24-25); ear, 

 13 (12-14). Adult male from Luchon, Haute-Garonne, France: 

 head and body, 150; tail, 58 ; hind foot, 25; ear, 12. Average 

 and extremes of fovu' adults from Biarritz, Basses-Pyrenees, 

 France: head and body, 144-7 (143-147^; tail, 63-7 (62-66); 

 hind foot, 23-5 (23-24); ear, 12-2 (12-13). For cranial 

 measurements see Table, p. 751. 



Specimens examined. —Twenty, from the following localities in south- 

 western France : Caterille, Haute-Garonne, 4 (U.S.N.M.) ; Luchon, Haute- 

 Garonne, 3 (U.S.N.M.) ; Biarritz, Basses-Pyrenees, 11 ; Pyrenees, no exact 

 locality (probably topotypes), 4 (B.M. and U.S.N.M.). 



Hemarlis. — The Pyrenean form of Arvicola scherman, though 

 resembling the Alpine A. scherman exitus in colour, external 

 characters and general form of skull, differs rather constantly 

 in the greater inflation of the auditory bullse and in the outline 

 of the anterior loop of m^. 



Two mounted specimens in the Paris Museum, collected in 

 the neighbourhood of Mont-Dore, Puy-de-.D6me, France (Nos. 

 1447 and 1510), while undoubtedly of the exitus type, are not, in 

 their present condition, determinable with certainty. It is not 

 impossible that they may be referable to the present race. 



3 6, 5 9. Biarritz, Basses-Pyrenees, J. F. Davison (c & p). 6. 6. 4. 15-22. 

 France. 

 1. Pyrenees. Baron E. de Selys- 45. 7. 5. 4. 



Longchamps (p). 

 1. Pyrenees. Purchased (Frank). 45. 5. 23. 7. 



1. Pyrenees. Stockholm Museum (e). 46. 6. 2. 66. 



Genus PITYMYS McMurtrie. 



1830. Psammomys Le Conte, Ann. Lye. Nat. Hist., New York, iti, p. 132 



(P. pinetorum Le Conte). Not of Cretzschmar, 1828. 



1831. Pitymys IMcMurtrie, Cuvier's Animal Kingdom, American edition, i, 



p. 434 {Psammomys pinctorum Le Conte). 

 1831. Ammomys Bonaparte, Saggio Distrib. Metod. Anim. Vert., p. 20, 



footnote {Psammomys pinetorum Le Conte). 

 1836. Pinemys Lesson, Hist. Nat. des Mammif. et Ois. d6couv. depuis 



1788, Compl. Oeuvres de BuiTon, v, p. 436 {Psatiimomys pinetorum 



Le Conte). 

 1857. Microtis Blasius, Saugethiere Deutschlands, p. 387 (sub-genus). Not 



Microtus Schrank, 1798. 



1867. Terricola Fatio, Les Campagnols du Bassin du Leman, p. 36 (sub- 

 genus to contain Arvicola subterraneus de Selys-Longchamps, and 

 A. savii de Selys-Longchamps). Not of Fleming, 1828. 



1877. Micrurus Major, Atti della Soc. Toscana di Sci. Nat., iii, p. 126 (sub- 

 genus to contain Arvicola nehroclensis Mina-Palumbo). 



1887. Pitymys Lataste, Ann. Mus. Civ. Stor. Nat. Genova, 2d ser., iv, 

 p. 266 (subgenus). 



