I20 MILLER 



Feet heavy and robust. Thumb short, with a flat bhuit nail. Soles 

 and palms naked, the former with six well developed tubercles, the 

 latter with five. 



Mammae, p. 2 — 2, i 3 — 2 = 8. 



SktilL — In general appearance the skull of Miis mteger resembles 

 that of Mus valldus} It is shorter (greatest length about 51 instead 

 of £55) and the rostrum is relatively broader and deeper. Audital 

 bullae similar in form to those of JMiis validus^ but the surface less 

 irregular. Region between anterior bases of zygomata broader than 

 in Mus validus so that the arches are more nearly parallel. 



Teeth, — The teeth are relatively as well as actually smaller than in 

 Miis validus and the enamel pattern is normal, that is, the posterior 

 vipper molar consists of two transverse folds, and an anterior internal 

 tubercle. There is no trace of the supplementary outer tubercles of 

 the corresponding tooth of ]\Ius validus. 



Measurements. — External measurements of type : total length 463 ; 

 head and body 235 ' tail vertebrje 228^; hind foot 48 (45) ; ear from 

 meatus 19 ; ear from crown 15 ; width of ear 15. In adult male topo- 

 type : total length 462 ; head and body 234 ; ^ tail vertebrce 228 ; ^ hind foot 

 46 (44) ; ear from meatus 21 ; ear from crown 16; width of ear i6. 



Cranial measurements of type: greatest length 52 (55);^ basal 

 length 45 (48. 6) ; basilar length 41.6 (45.6) ; palatal length 23 (26) ; 

 least width of palate between anterior molars 5 (5) ; diastema 14 

 (14.6) ; * length of incisive foramen 8 (9) combined breadth of incisive 

 foramina 3 (3.6) ; length of nasals 21 (22.6) ; combined breadth of 

 nasals 6 (6.2) ; zygomatic breadth 25 (28) ; interorbital breadth 8 (8) ; 

 mastoid breadth 19 (19) ; breadth of braincase above roots of zygomata 

 18.8 (20) ; depth of braincase at anterior border of basi-occipital 12.8 

 (15) ; frontopalatal depth at posterior extremity of nasals 12.8 (13.4) ; 

 least dejoth of rostrum immediately behind incisors 10 (10) ; maxillary 

 toothrow (alveoli) 9.6 (11) ; width of front upper molar 3 (3) ; man- 

 dible 30 (31) ; mandibular toothrow (alveoli) 9 (10). 



Speci?nens examined. — Four, three from the type locality, and 

 one from Pulo Lingung. 



Remarks. — This rat is probably a near relative of the Bornean 

 Mus 7}iiilleri of Thomas.^ The specimen from Pulo Lingung does 

 not differ appreciably from the others. 



' See Proc. Biol. Soc. Washington, xiii, pi. iii and iv. 



* Collector's measurement. 



^Measurements in parentheses are those of the type of Mus rmlidtis. 



*In the type of Mus jniilleri ihe diastema is 12 mm. 



*Ann. and Mag. Nat. Hist., 6th ser., xiv, p. 450. December, 1894. 



