1905.] MAMMALS FfiOM JAPAK. 345 



believed that it was " semi-ad ulte." This course, besides making 

 the figure fix the type, has the advantage of giving at least one of 

 the two foi-ms an exact typical locality, whereas if the name 

 momonga were applied to the large form and a new name given 

 to the small one, the typical locality of neither would be definable. 

 We may thus treat the British Museum 1844 specimen as a 

 co-type, as it was one of those on which the description was based 

 and agrees absolutely with the typical figure. This specimen, far 

 from being " semi-adulte," is absolutely full-grown, its teeth 

 showing more evidence of wear than is the case with any of 

 Mr. Andei^son's examples. 



The new subspecies may be briefly described as similar to true 

 momonga^ but conspicuously larger and with a much longer tail. 

 The co-type above referred to has a skull measuring 36 X 20 mm., 

 Temminck's figure is 35-5x2r5; while the smallest of the ISTara 

 skulls is 41 X 23 "5. The hind foot of momonga is just 30 mm., 

 that of amygdali 37-38. 



In colour there is probably little diflerence, but direct com- 

 paiison is not possible, as the co-type of momonga is in the brown 

 summer pelage. The new form, in its winter pelage (January), 

 has its dorsal hairs blackish slaty, washed terminally with Isabella, 

 tending sometimes towards bufiy. Cheeks and under surface 

 white, the hairs slaty basally. Under side of membranes irregu- 

 larly washed with pale fawn. Upper surface of hands and feet 

 grizzled black and fawn, a prominent tuft of longer hairs at the 

 end of each hind toe clear isabeUa. Tail subdued w^ood-brown, 

 washed above and below with black. 



Skull larger and heavier in every way than that of true momonga. 



Dimensions of the type, measured in the flesh : — 



Head and body 166 mm. ; tail 139 ; hind foot 38 ; ear 25. 



Skull — greatest length 42-2; basilar length 31-5; greatest 

 breadth 26; length of nasals 13 6; breadth of brain- case 19; 

 palatilar length 17"7; palatal foramina 4'3 ; length of upper tooth- 

 series, exclusive of p^, 6'8, 



Type. Adult male. B.M. No. 6.1 .4.122. Orioinal number 257. 

 Killed 27 January, 1905. 



It is probable that the smaller form, to which I restrict the 

 name momonga, will prove to be an inhabitant of one of the 

 southern islands, while the larger one is no doubt spread widely 

 over Hondo. 



" Brought to me by a servant after my departure from Washi- 

 kaguchi. They were taken near the top of a rather high 

 mountain, in a forest of Ghamcecyparis. Regarded by the peasants 

 as the young of the Petaurista, and therefore called ' Bandari.' " — 

 M.P.A. 



24. SCIURUS VULGARIS ORIENTIS, Subsp. U. 



6 . 98, 102. 2 . 103. Aoyama, Hokkaido. 

 6. 125, 127, 136. $. 126, 128, 131, 132, 133, 138. Nobori- 

 betsu, near Moruran, Hokkaido. 



24* 



