PITYMYS 763 



convexity, the first stage in the formation of a postero-internal 

 loop. Such an incipient looji rarely if ever occurs in P. swbtcr- 

 rancus, though it is common and not infrequently well developed 

 in P. fat'ioi and P. multiplex. 



Measurements. — Average and extremes of six adults from the 

 type locality: head and body, 101-2 (96-105); tail, 33-3 

 (31-35) ; hind foot, 14-9 (14-4-15) ; ear, 9-0 (8-5-9-3). For 

 cranial measurements see Table, p. 766. 



Specimens examined. — Eleven, from the following localities in France : 

 neighbourhood of Barcelounette, Basses-Alpes, 9 (B.M. and U.S.N.M.) ; 

 Alps of department of Var, 1 (U.S.N.M.) ; no exact locality, 1. 



3. Basses-Alpes, France. Purchased (Parzu- 52. 5. 27. 53-55. 



daki). 

 6, 3 9. Barcelonnette, Basses-Alpes. 0. Thomas (p). 8. 8. 10. 126-129. 



(C. Mottaz.) 



PITYMYS FATIOI Mottaz. 



1909. ntymys multiplex fatioi Mottaz, Bull. Soc. Zool. do Geneve, i, 



p. 180, January 15, 1909. Type in Mottaz collection. 



1910. Pitymys multiplex fatioi Trouessart, Pauue Mamm. d'Europe, p. 189. 



Tiipe locality. — Zermatt, Valais, Switzerland. 



Geographical distribution. — At present known only from the 

 neighl)ourhood of Zermatt. 



Diagnosis. — Similar to Pitymys druentius but larger (hind foot, 

 15 to 16 mm., condylobasal length of skull about 23 mm.) ; 

 brain-case less deepened ; convexity of dorsal profile very slight ; 

 auditory bullte not specially inflated, scarcely rising to level of 

 cutting surface of molars. 



Colour. — The colour does not differ appreciably from that of 

 Pitymys selysii. 



Measurements. — Average and extremes of seven adults from 

 the type locality: head and body, 99-7 (95-104); tail, 35 

 (30-39) ; hind foot, 15-4 (15-16) ; ear, 9-4 (9-10). For cranial 

 measurements see Table, p. 766. 



Specimens examined. — Twenty-six, all from the neighbourhood of 

 Zermatt (U.S.N.M., Mottaz and Geneva). 



BemarJis. — Though specimens of this animal were included 

 by Fatio under the name multiplex, the Zermatt Pitymys is, 

 as pointed out by Mottaz, easily distinguishable from the form 

 inhabiting northern Italy and the Italian slope of the Alps. 

 The relationships seem in fact to be much more intimate with 

 the western Alpine P. druentius; but more extensive material 

 than that now available will be required before the exact status 

 of the members of this group can be properly understood. 



