1907.] FROM THE PHILIPPINE ISLANDS. l4l 



2. SciURUs MiNDANENSis Steere. 



c?. 764. Mount Apo, Mindanao. 3000'. 



3. Mus sp. 



2 . 748, 750. North Central Mindanao. 1100', 3000'. 



2 . 754. Mount Apo, Mindanao. 3000'. 



A i-at of the rattus group. Dr. Mearns describes no less than 

 three species of this group, but does not seem to be aware that 

 the presence of spines in the fur in these rats is a most variable 

 character, depending in all on age, and in some on season, the 

 spines being shed and regrown periodically. 



4. Mus BAGOBUS Mearns. 



BuUimus (g. n.) bagobus Mearns, P. U.S. N. M. xxviii. p. 450, 

 1905. 



2 . 755. Mount Apo, Mindanao. 3000'. 



I fail to see any sufficient reason for the creation of a special 

 genus to contain this species. The small supplementary cusps on 

 the lower molars, on which Dr. Mearns mainly founds the genus, 

 are not only present in many Malayan species usually referred to 

 Mios, but they are even quite well-mai'ked, though small, in his 

 own specimens of Mus albigularis Mearns, also from Mindanao. 

 None of the other characters mentioned by him appears to me of 

 generic importance. 



It is unfortunate that Dr. Mearns had not had experience of 

 the difficulties of Murine dental characters before venturing to 

 describe genera of this group. Had he had such experience T am 

 sure he would not have described Bullimus, nor would he have 

 based another genus {Limnomys) on a single specimen with teeth 

 "too worn to furnish characters distinguishing them from Mus" 

 unless the other characters were of a far more striking nature 

 than appears from his account. 



Mr. Anderson's specimen of Mus bagobus, being a female, 

 enables me to state that the mammte number 1 — 3 = 8, a formula 

 only occurring to my knowledge in two other Eastern species 

 of Mus. 



5. Mus vuLOANi Mearns. 



$ . 752. North Central Mindanao. 4000'. 

 A member of the common and widely spread concolor-ejihipjnum 

 group. 



6. Crunomys melanius Thos. 



Abstr. P. Z. S. 1907, p. 5 (Feb. 12). 

 - S. 751. North Central Mindanao. 3000'. 29 February, 

 1906. B.M. No. 7.2.2.14. Tyj^e. 



A species with the general appearance of a blackish Akodon of 



