4fi M. YOKOYAMA. 



Mongolia, China, India, Persia and Tongking. From the Rhaetic it 

 lias been described under the name of Podozamites distans. In Japan 

 it occurs in great abundance and can be distinguished into the follow- 

 ing varieties : — 



a.) P. lanceolatus var. genuina Heer. 

 PL IV, fig. 2. PI. VII, fig. 8b. PI. XIV, fig. 12b ? 



This variety is distinguished by having long narrow leaflets, 

 each of which is drawn out into an acuminate apex. 



The leaflets of this variety are frequently met with at Shima- 

 mura and Okamigo. Fig. 2, PL IV, has the upper part of the leaflet 

 strongly falcate, is about 50 mm. long and 9 mm. broad, and is fur- 

 nished with about 25 fine longitudinal veins. Fig. 8b, PI. VII, has the 

 apical end broken off; but, to judge from its superiorly gradually 

 narrowing" form, it is evident that it has terminated in an acuminate 

 apex. It measures 5'5 mm. in breadth, and has about 27 veins. Fig. 

 121), PI. XIV, from Hakogase is a doubtful case, but its general form 

 points more to this than to any other variety. It possesses 25 veins, 

 and is 5*5 mm. broad near the base. 



b.) P. lanceolatus var. intermedia Heer. 

 PI. IV, fig. 3a, 4a. PL V, fig. 3, 7, 9. 



Leaflets in this variety are gradually narrowed towards the apex 

 which is bluntly pointed. 



Specimens are by no means rare at Shimamura and Ohnnigd, 

 but those from the former locality are alone figured here. Fig. 3, PL 

 IV, which is the longest of the specimens with both apex and base 

 preserved, measures 83 mm. in length and 12*5 mm. in breadth; fig. 

 4a, which is shorter, is 55 mm. long and 14-15 mm. broad, whilst fig. 



