MUSCARDINUS 591 



Colour. — Upper pai'ts including ears and entire tail very 

 uniform yellowish buff, the exact shade perhaps best described 

 as intermediate between the buff-yellow and raw-sienna of 

 Ridgway, somewhat brighter on sides and flanks, faintly darker 

 along middle of back ; feet concolor with back, the toes 

 suffused with whitish ; underparts strongly contrasted pale 

 cream-buff, the line of demarcation well-defined and conspicuous, 

 the hairs slaty grey at base ; chin and throat usually though not 

 always with pure white area as in M. avcUanarius, this area when 

 present not forming noticeable contrast with rest of underparts. 



Shull and teeth. — The skull and teeth do not differ appre- 

 ciably from those of Museardimis avellanar'mti, though the teeth 

 are usually a trifle larger. 



Measurements. — Type (adult male) : head and body, 90 ; 

 tail, 68 ; hind foot, 10 ; ear from meatus, 12. Adult male from 

 Monte Cimino, Rome : head and body, 74 ; tail, 70 ; hind 

 foot, 18 '5. Average and extremes of ten males from Sorrento : 

 head and body, 79 • 4 (71-86) ; tail, 65 ■ 3 (63-73) ; hind foot, 15 ■ 7 

 (15-17). Average and extremes of ten females from Sorrento: 

 head and body, 79-9 (75-85); tail, 69-6 (62-73); hind foot, 

 15*9 (15-17). For cranial measurements see Table, p. 589. 



Specimens examined. — Fiftj'-seven, from the following localities in Italy : 

 Perugia, 1 (type) ; Monte Cimiuo, Rome, 1 (Genoa) ; Sorrento, 54 

 (U.S.N.M.) ; Palermo, Sicily, 1 (too yonng to be positively identified). 



Remarks. — This species is well differentiated from Muscar- 

 dinus aveUanarius by its bright, light colour and by the white 

 streak between ear and eye. It may eventually prove to be 

 identical with the Myoxus speciosus of Dehne from the extreme 

 south of Italy, but the description of the latter indicates a much 

 darker more reddish animal. A single immature specimen 

 (No. 8. 9. 28. 1) from Palermo, Sicily, too young and in too 

 bad condition to be satisfactorily identified, is noticeably different 

 from any of the numerous young individuals from Sorrento. In 

 its " foxy " red colour it agrees with the description of Dehne's 

 animal. 



6. Perugia, Italy. (Brogi.) Dr. E. Hamilton (p). 98. 10. 2. 17. 



[Type of species.) 

 ?. Palermo, Sicily. J. I. S. Whitaljer (p). 8. 9. 28. 1. 



Family MURID^. 

 1821. Miiridx Gray, London IMed. Repos., xv, p. 303, April 1, 1823. 



Geographical distribution. — As in the order Rodentia. 



Characters. — Anterior portion of zygomatic arch not formed 

 chiefly by jugal ; infraorbital foramen large, wider above than 

 below, without accessory canal ; jugal bone splint-like, sujjported 

 by long zygomatic processes of maxillary and squamosal, not 

 in contact with lachrymal anteriorly ; mandible with angular 



