滿洲國三江省彌榮村産のマンモス象化石と滿洲地方に於ける其分布

抄録

In August of last year the writer obtained mammoth remains found at Iyasaka-mura, Manchuria. The description of the specimens, with a reference to their distribution in Manchuria, is briefly as follows:
Tusk: Both ends are broken and lost. Length along the curvature 1.7m, while the distance between two ends 1.2m. Diameter 24cm at the top and 29cm at the base. The specimen is brittle and stained with a bluish tint.
Tooth: The state of preservation is bad, and the greater part is extremely worn out. The unworn surface is blackish in colour. The grinding surface is oval, with length 105cm, maximum width 90mm, and height 117mm. The specimen consists of ten ridges, the interspaces between them being about 7mm in breadth. The thickness of the ridges is 7-8mm, and the enamel layers are 1.5mm in thickness, and their cross-sections show remarkably wavy plaits characteristic of this species.
Mandible: Broken part of a mandible, 38cm long and 14cm broad. The above specimens may be determined from these characteristics as belonging to Elephas primigenius (Blum), and considering the ‘Blagovyeshchensk Geological Map’ and other literatures, they were probably derived from the recent deposits (sand, clay and gravels) of Upper Diluvial age. Mammoth fossils have frequently been found in many places of Manchuria and Siberia. The localities of the specimens kept in the Harbin Museum and those described in the previous literatures are given in the annexed map. A glance at this map will show us that all these mammoth remains are, except Dairen (N. Lat. 39°), distributed further north of North Latitude 42° of Manchuria and North Latitude 46° of Sakhalin (No occurrence has hitherto been known in Korea).
This fact should be considered as very important in the palaeogeographical study of Eastern Asia.