454 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxviir. 



l)ovon(l the tips of the claws. Fore foot 5-tiibercuhite; three small 

 anterior tubercles foriiiino' a t riaiio-le, the front one placed at the 

 junction of the thiid and fourth (li**-its, the others, respectively, at the 

 junction of the second and tliird and fourth and fifth dij^its, the outer 

 one belui;" slightly posterior. The two large palmar tubeixdes are 

 aligned on the abortive thumb, which has a small, round, flattened 

 nail. Hind foot with dou]>le lobed tubercles at the base of the inner 

 and outer digits, small rounded tubercles at the junction of the second 

 and third and third and fourth digits, a small rounded one near the 

 outer margin of the naked soU^ anteriorly, and an elongated one 

 near the inner margin posteriorly. There are also several additional 

 tubercles of minute size, notably one or two behind the postero- 

 external one. The tail is concolor, (juite thickly coated with stiff 

 brownish-black hairs which obscure the aunuli, which latter niuuber 

 thirteen to the centimeter on the middle of the tail. 



Color. — Upperparts brownish slate, enlivened ])y yellowdsh-brown 

 tips to the hairs of the general coat; muzzle blackish; underparts 

 grizzled yellowish brown; tail dark purplish brown throughout; feet 

 well coated above with hairs which are drab-brown, slightly grizzled; 

 ears dark purplish brown, coated with l)lackish hairs; whiskers V)lack- 

 ish, with a few grayish white ones; pelage of upperparts slate colored 

 at base, paler at base on underparts. 



Skull and teeth. — In the general shape of the skull there is a resem- 

 blance to Apomys., the swollen braincase, lengthened rostrum, and 

 upper profile being similar; but the audital bulhe, anterior palatine 

 foramen, and teeth are very dilferent. In the form of the rostrum 

 and nasals and the length of the anterior palatine foramen, as well as 

 the general coniiguration, there is a similarity to liatoinys., which is 

 strengthened by an external resemblance. The teeth are similar to 

 those of Mus,' but the audital bullse are more flattened and compressed 

 externally and the palate much l»roader. The skull is light, with a 

 large semicircular vacuity between the temporal and parietal ))ones, 

 above the auditoTy opening. Rostrum elongate; nasals narrow, trun- 

 cate posteriorly. 



Sj)eriin('iii< exam /lied. — Only the type. 



Crunkil meusureinents of the type, an adult mule, fruin Mould Apo, Mindanao. 



Measurement. 



No. 125280, 



U.S.N. M., 



type. 



Basilar length (Hensel) 



Occipitoiiiisal length .. 



(iriatest interparietal breadth 



Least intenirbital breadth 



Length of internasal suture 



Breadth of palate between last molars 



Antero-posterior diameter of audital bulla. 



Length of upper toothrow 



Mandible 



Length of mandibular toothrow 



vim. 



28.5 



37.5 



16 

 C 



15.2 

 5.1 

 6.2 

 6.2 



21 

 6.2 



