JUKASSÏC PLANTS FROM KAGA, -HIDA, AND ECHIZEN. / 



2. Porphyries and Porphyrites, forming a consider- 

 able part of the mountain chain in Hick and Kaga. One of these 

 (hornblende-porphyrite) also occurs as dykes in the Jurassic rocks, 

 which must therefore be older. 



3. Andésites, very extensive and covering the Jurassic 

 system. The Hakusan group is made up of these rocks with which 

 the Tertiary tuffs above mentioned may be contemporaneous. 



4. Modern Lavas, covering the top of Gozen, and also 

 found in valleys beneath in the form of loose pebbles. 



The Jurassic System, whose vegetable remains are the sole object 

 of the present monograph, extends over the provinces of Kaga, Hida 

 and Echizen, between 36° 20' and 35° 50' N. Lat., approximately 

 forming a rhombic outline, with one diagonal pointing north and 

 south, and with its sides varying in length from 9 to 10 ri (35 — 40 

 kilom.). The general strike of the strata is N.E. with dip to N.W., 

 in most cases very gentle (10° — 15°), but sometimes as much as 70°. 

 It is as above stated covered with andésites which form a belt over 

 the system crossing it from N.E. to S.W., and also characteristically 

 pierced with dykes of hornblende- porphyry, which Mr. Kochibe 

 observed in several places. The system has also been observed near 

 Kurouchi in Hida, forming a small basin in itself. 



The fossils obtained from the system are very numerous. They 

 belong to Ostracoda, 115 ) Mollusca, 17 ) and plants ; the first represented 

 by the genus Estheria, and the second, with the exception of a few 

 badly preserved Ammonites, by the genera Ctjrena, Corbicula, Mela- 

 nia (7J, Placiuia, Ostrea, Solen and Natica. The first three with many 

 species are abundantly represented by individuals, some of which are 



16) Ostracoda are found at Tanimura in Echizen, Okamigo in Hida and Icbiuose i.i Kaga. 



17) Mollusca are found at Kurouchi and Ushimaru in Hida, Kiuomeri, Yanagidaui, Ichinose 

 and Chügü in Kaga, and Nochiuo and Kaizara in Echizen. 



