NO. 1402. 



NEW PHILIPPINE MAMMALS—MEAPNS. 



455 



E.rtcnial )inri.-iiirt'))ienls, flic type. 



Measurement (taken from fresh specimen). 



Total length 



Tail vertebraj 



Tail to enri of hairs 



Fore foot 



Hind foot 



Head 



Ear from ennvn 



Ear above notch at base 



Longest whisker 



Diameter of thiekest part of tail 



No. 125280, 



U.S.N. M., 



type. 



mm . 

 2r>5 

 120 

 124 



IGx.'i. 5 



32 XS 



45 



14 



20 



42 

 5. 5 



APOMYS, new genus. 

 MOUNT APO ]\IICE. 



Ti/2Je. — Apomys hylocietes.^ new species. 



In general, Apomys is a connectant of the genera J/? ^s' and Peromys- 

 cas. The shape of the pterygoids and postpalatal notch closel}' resem- 

 bles those of the genus Chirop<jd<>niys. The teeth and character of 

 pelage are not unlike those of Malacomys^ with the exception of the 

 posterior upper molar, which is much smaller and less complex in 

 Apomys. The braincase resembles that of I\'romyscus and Crlcetulus., 

 but is more swollen in the parietal region. 



Characters. — General external form as in Mas; pollex slightly less 

 rudimentary, with a rather broad nail; soles naked; fore foot with 

 5 tubercles, 4 of which are placed at the base of the digits, the fifth at 

 the outer side of the base of the palm, the two posterior tubercles 

 being relatively much larger than in Mus; hind foot with 6 tul)ercles, 

 1 at the base of the first (inner) toe, 1 at the base of the second, 1 at 

 the junction of the third and fourth, 1 at the ])ase of the fifth, a small 

 rounded one on the outer side of the sole a little behind the first digi- 

 tal tubercle, and an elongated one occupying the inner margin of the 

 sole;" eyes relatively smaller than in Mas; whiskers very long, reach- 

 ing to the a])donien; body thickly furred above and below, with pelage 

 long and soft; ears large, thin, and naked; tail scantily haired, longer 

 than head and ))ody, sometimes white at the end, the annuli distinctly 

 visible; mammae, two pairs, inguinal. In eight females examined no 

 thoracic or abdominal mammtB were detected. Skull elongate, with a 

 pronounced rostral portion; without superciliary bead; incisive fora- 

 men less than half the length of diastema between incisor and hiteral 

 teeth; upper and lower incisors yellow on anterior face, and witiiout 

 groove; molars rooted; first upper molar 6-tuberculate, in three series, 



« Tlie tubercles of the hind foot are not paired as they are in 3/(t.s, but are more 

 widely separated and oljlique to each other. In Mus the outer tubercle of the mid- 

 dle pair is internal to the base of the outer digit, while in Apomys it is marginally 

 placed at the base of the digit. 



