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Show 1 9 0 5 .] MAMMALS FROM JAPAN. 345 believed that it was " semi-adulte." This course, besides making the figure fix the type, has the advantage of giving at least one of the two forms 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. Anderson'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*5 X 21*5 ; while the smallest of the Nara 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 difference, but direct comparison 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 bufi'y. Cheeks and under surface white, the hairs slaty basally. Under side of membranes irregularly washed with pale fawn. Upper surface of hands and feet grizzled black and fawTn, a prominent tuft of longer hairs at the end of each hind toe clear isabella. Tail subdued wood-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 p3, 6-8, Type. Adult male. B.M. No. 6.1.4.122. Original 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 Washikaguchi. They were taken near the top of a rather high mountain, in a forest of Chamcecyparis. Regarded by the peasants as the young of the Petaurista, and therefore called ‘ Bandari.' - M.P.A. 24. SCIURUS VULGARIS ORIENTIS, subsp. 11. cJ. 98, 102. § . 103. Aoyama, Hokkaido. cJ. 125, 127, 136. ? . 126, 128, 131, 132, 133, 138. Nobori-betsu, near Moruran, Hokkaido. 24* |