On some Fossil Plants from the Coal-bearing 

 Series of Nagato. 



By 



Matajiro Yokoyama. 



With Plates XXXri— XXXIV. 



Fii tlic :'])i-iii£i' of 1S90, aIc. l\i,('liilM> oi' tlie (k'oloo-icnl .airvev 

 (lir'ooYcred soihc ])]:iiit i'ciiiüiiis in the cw.'il-lK'nn'n^' icrie.s of Xm^'uIo :it 

 •A ])]:!(•(' f:i]I('(l V:iin:!iioi, some .']() kiloineters en;'t of the city (jf 

 Ak:un;iLi-:is(-ki/' Tliese ])]:nits lie ren^o-iiize«! :is ^[c.'ozoic, and sulj^e- 

 (pieiitlv sent tlieni to nie ior exruninatioii. ()n lookiii^'at tliese ])lant>!, 

 I was at (^nce struek 1)v the oetanTenee of form.: whieli are (jnite foreio-n 

 to onr ^riddle dnrassie flora, lately worke(l ont"-' 1)\' myself, and wliidi 

 arc liirlua'to knoAvn oid\' a,' ocrni'rinL;" in tlie IHuptie. Tiiterested in this 

 disco^■ery, I visited the locality myself in tlie ninmci' ()f tlie same year, 

 in ordi'r to ohtain. ii" ])ossil).lc, :i laiycr mnnhcr of species, which, as T 

 thonu'ht, Avould l)e (jnite indispensahle for the determination of tlieir 

 exact a_u"e. Soi'ry to ::av, ho\ve\ei', T did ni)t succeed in makino- :inv 

 LjTeat additions to tlie iiiimher i-f s])ecies, nearly all tlie jilants whicli I 

 found ha\i:iLi- Ijeen already represented in tlie Ci,IIection of ^Ii-. 

 i\ochihe. Still my collection ])ro\'ed to l)e \ery useful, f )r I had tlius 

 a laru'er numhia* of in(h'\ idual.- for comparison. 



The coal-heariiii^' série.; of Xag'ato occupie,; a limited area in tlie 

 .southern ])ortion of that ])rovince bordering' the Iidaiid sea, and con- 



1) 'I'liis city is better Icnowu nuilpr the old uauie of SluiiioiKischi. 



■1) Yokoyama, Jurassic Phmts from Katja, ITidn, mul Kchi~i')i, -Inininl of the College of Science. 

 Imperiid University, Jajxin, vol. Ill, part I, ISS'.l. 



