JURASSIC PLANTS FEOM KAGA, HIDA, AND ECHIZEN. 15 



ovalis. The genus Nilssonia is represented by at least 3 species; one 

 of which, N. oriental is, is found both in England and Siberia. It 

 characterizes the flora of Hakogase. The two others are new, one of 

 them A T . nipponensis being closely akin to A T . acuminata Schenk of the 

 lîhaetic of Europe. Anomozamites, the brother genus of the preced- 

 ing, is so far Aery doubtfully represented. Very interesting is the 

 occurrence of a species of Diuonites closely related to D. Brongniarti of 

 the Wealden. But the most interesting of all is Dictyozamites indiens 

 Fstin., a genus and species hitherto restricted to the Rajmahal flora 

 of India. It is found great abundance at Ozô. Allied ot the preced- 

 ing, but with coarser veins and nets, is Dictyozamites grossinervis, a 

 new species, found at Shimamura. The family of Cycadeae is 

 known so far by a seed described by Dr. Geyler under the name of 

 Gycadeospermum japonieum, which is the largest known from this 

 order. 



5. Coniferae. Represented by 6 genera and 10 species, of 

 which 4 genera with 7 species are Taxaceae, and the rest, Abietaceae. 

 Of the first family the new genus of Ginkgodium is the most abundant 

 in individuals. It is closely allied to Ginkgo, but decidedly dis- 

 tinguishable by its numerous, simple, parallel veins and its short 

 petiole. So far only a single species has been discovered forming 

 however, a characteristic feature in the flora of Shimamura. The 

 next important genus is the Ginkgo itself. Though much less 

 numerous in individuals, it has yielded 3 species, all belonging to 

 forms already described. The most important of these is Ginkgo 

 digitata which has been found in Yorkshire, Spitzbergen and Siberia. 

 In the general form of the leaves this specie approximates very 

 closely to our living G. biloba, however with rarer veins. G. sibirica 

 and G. cfr. lepida, with the lamina separated into many narrow lobes, 

 are closely allied to each other. So far, they are strictly Asiatic. Then 



