JURASSIC PLANTS FROM KAGA, HIDA, AND ECHIZEN. 5 



westerly direction, «and constantly fed by mountain torrents on its 

 way, unites with the Managawa near the town of Ono. After this 

 confluence the river is called the Asuwagawa, and after its junction 

 at Kumarn, with the Hinogawa, a large river coming from the south, 

 empties itself into the sea at the port of Sakai. The total course of 

 the river is about 32 ri (125 kilom.), for l / 3 of which it goes through 

 a plain. 



The Shirakawa of Hida has two sources. One stream, rising in 

 Bessan, flows easterly until it joins the Shögawa at Okami. Here 

 the river takes the name of Shirakawa and rushes almost due north 

 through deep ravines for 18 ri (72 kilom.) to the boundary of 

 Etchiu, through which province, under the name of the Imizugawa, 

 it runs for 40 ri (157 kilom.), till it enters the Bay of Toyama at 

 the port of Fushiki after a total course of more than 58 ri (230 

 kilom.). 



Secondly as regards the geology, I shall here enumerate the 

 rocks and formations as observed by Mr. Kochibe. 



Among the sedimentary rocks we find 



1. Crystalline Schists, mainly mica-schist and chlorite- 

 schist, but also serpentine and crystalline limestone, taking only a 

 subordinate paît in the formation of the mountain system, and occa- 

 sionally out-cropping from beneath the younger rocks, e. g., in the 

 vallevs of the Tetorigawa, the Shirakawa, and also the Ishidoshira- 

 ffawa. 



2. Sandstones, Clay-slates and Limestones, bar- 

 ren of fossils, but probably referable to the younger part of the 

 Palaeozoic Group. These rocks are exposed only in the southern 

 part of the chain near Mino. 



3. Mesozoie Group, consisting of sandstones, shales and 

 conglomerates of the Jurassic Period, and occupying a great part 



