44B 



rnoCEKDISGS OF THE NA TIONAL MUSEmf. 



V(H,. XXVIII. 



SkxJl and teeth. — Skull high, with braincase expanded in the parie- 

 tal and contracted in the frontal region; supraorbital bead prominent; 

 temporal fossa ridged; rostrum stout; nasals narrowed and bluntly 

 pointed posteriorly; audital ))ulhe high and elongate; post-palatal 

 notch wide; anterior surface of upper incisors ochraceous. 



Cranial inettsiunncntft of t lie li/jw, an adult female, from Todaya, Mindanao. 



Measurement. 



Basilar length ( Hensel) 



Occipito-nasal length 



Interparietal hrcadth (from outer edge of beaded upper margins) 



Length of iiiteriiasal suture 



Greatest ))reailth of rostrum 



Length of upper toothrow 



No. 125224, 



U.S.N.M., 



type. 



27 

 34 

 13 

 13 



6 



6.9 



External mca.virements of fire adult t^pecimenx from Todaya, Mindanao. 



Measurement (taken fresh). 



No. 125224, 



U.S.N.M., 



type." 



No. 125223, 

 U.S.N.M., 

 topotype.a 



No. 125225, 

 U.S.N.M., 

 topotype.b 



No. 125226, 

 U.S.N. M., 

 topotype.& 



No. 125227, 

 U.S.N. M., 

 topotype.b 



Total length 



Tail vertebra' 



Tail to end of hairi- 



Hind foot 



Head 



Ear above crown .. 

 Ear above notch . . 



2.S3 

 145 

 148 

 29 

 42 

 13 

 l.s 



278 

 144 

 148 

 27 

 39 

 13 

 18 



mm. 

 291 

 138 

 143 



28.5 



42 



13 



18 



285 

 130 

 133 

 28 

 42 

 13 

 18 



" Ailult female. 



'> Adult male. 



S2>c('imen8 examined. — Five adults, all from Todaya, on Mount Apo, 

 altitude 4,000 feet. Skins with skulls. 



MUS VULCANI, new species. 

 APO VOLCANO RAT. 



OoiiV-houejli Tahr-ree-aJin^ (Bagobo). 



7}//A.— Adult female (skin and skull). Cat. No. 135216, U.S.N.M. 

 Collected on Mount Apo sit 7,000 feet altitude, southern Mindanao, 

 Philippine Islands, June 2(5, 1904, by Edgar A. Mearns. (Original 

 numl)er, 5674.) 



Vhai'acters. — Similar to J///.s' conealoi' Blyth, but larger; also resem- 

 bling M. tadai/i'iiKt.s.^ \n\i smallei", darker, with less spiny hair. Tail 

 not strictly unicolor, l)ut i)alor on under side; whiskers reaching tip 

 of ears; caudal annuli lO to the centimeter on middle of tail; ears 

 large, nearl}' naked; tail about equaling the length of the head and 

 body, but fre(|uently longer. 



Color. — Central area of upperparts dusky chocolate; sides drab-gray 

 overlaid by tawny-olive tips to the long hairs; muzzle hair brown; 

 underparts whitish gra}, perceptibly washed with cinnamon; tail 



