246 M. YOKOYAMA. 



liest, but wnritiiii^' the ti]). Jiidgino- I'roiii its rreneral outline, it seems to 

 l)e]oi\"- to the vnriety (ffuii'mti ol' lleer in wliidi tlie le-iflets are drawn 

 out into an acnininate a])ex. Fia'. 4 a])])enrs to liave been nuidi 

 shorter, and I am not quite sure wliether it really hclono-s liere. 



6. Baiera ? sp. 

 PI. XXXTV. Fio-. 6. 



Fra^'ments of loni>', ])'n'allel-sided leaves, ajiparently representing; 

 lobes of a I'aiera or of a (iinkn'O/. oerau' in some eases tliiekly seattered 

 on f ices of stone. In one case they were observed arising' from a 

 commori base, as sliown in the ficaire, each ha\in<i- 8-4 ])arallel veins. 

 It is much to be regretted that tlie specimens are so im])erfect as not 

 to allow any ])recise determination. 



As to the results to be drawii from tlie study of tlie al)i)ve jilarits, 

 I must sav that the number of species is yet too limited to allow us to 

 form any very definite conclusions. Some of them however seem to 

 lie tolérai )1 y characteristic. DiclijoplinUnvi aciitlloJuiiii, has hitherto 

 been restricted to the Kluptic of Euro])e and tlie similar formations 

 of Persia arid Tongking. DicfiicplniUiuii japunicinii, altliough new, ex- 

 liil)its a great relationship to D. Miuiskri rar. ahhreviaf t (MJp])., Avhich 

 occurs only in the Rha^tic. A tliird IHctiioplniUmn, 1). Kuchihc^ is 

 (piite new, showing only a (bstant relation to the Pluetic form V. 

 Srliniîîi Xath. .sp.. It cannot tlierefore, strictly s])ea.king, lie em- 

 ])loyed in the determination ol' the age. Tlie two other well deter- 

 minable s])ecies, A^plciiniiii lloa^i^erti and l'oilozaiiiitcs laiicenlatus, are 

 widely diffused in the Phtpfic as well as in the dnrassic. Thus we 

 have here two species ])ointing to the Pha'tic, and two species pointing 



