MESOZOIC PLANTS FKOM NAGATO AND BIÏCHU. 11 



of limestone-breccia between, the limestone being similar to that 

 of the conglomerate. The whole bed is pierced here and there 

 by dykes of porphyrites and quartz-porphyries, often causing con- 

 tact metamorph ism. 



The whole complex of strata from No. 1 to No. 3 rests on 

 a Palaeozoic formation whose upper part at least is attributable 

 to the Carboniferous. 



The Pseudomonotis bed (No. 1) in Japan is now generally 

 accepted as an equivalent of the Noric stage of the Alpine Keuper. 

 Therefore I once thought that the plant-bed which is immediately 

 above it at Nariwa might belong also to the same stage ; but 

 a closer examination of the fossil plants, though fragmentary and 

 not clearly determinable, gives one the impression that they be- 

 long to a somewhat higher horizon. The species of plants which 

 I have been able to distinguish in them are as follows : 



1. CLADOPHLEBIS sp. 

 PI. Ill, Fig. 2, 4, 7. 



Fragments of the pinnae of a Cladophlebis with pinnules 

 which show a close resemblance to those of C. nebbeîisis (Bkgnt.), 

 occurring in the Rhsetic of Nagato. The fine lateral veins of 

 the pinnules are not always clearly observable, but when distinct, 

 they are forked only once. 



2. SAGENOPTERIS sp. 

 PI. III. Fig. 3. 



A segment of a Sagenopteris lacking the apex. It has an 

 elongated shape, broadest near the middle and tapering toward 



