242 M. YOKOHAMA. 



Specimens represented in li^\ 3, 4, ]>]. XXXH, difler fmm others 

 in liaving' twice forked secondary veins in s[)ite of the smaller size of 

 the pinnnJes, nuifli as in fiuiires coinmonly ,u'iven of tlie typical forms 

 of Asplcnntiii irliitbicnsc^ l>>''jf- (<-'• \X- in J leer's ]]eitr. z. rinraflora 

 Ostsili, u. d. Amurl. 1876, pi. T, III. and in Schenk's Jurassische 

 l^flanzen in Ivichthofen's China, vol, J\', pi. LI I.), jhit as it has 

 been ah-eady sliown by eminent autliorities, that Aspkiiitivi n-ldthicnsc 

 is synonymous with Alcthopteris indicuin Old. et Morv.^'^) whicli in 

 turn exhiljits no difference from our Aspltniiiui Bœsscrti,'^^ so it would 

 be n(3w (phte objectionaljJe to separate tlie abo\'e specimens into dis- 

 tinct species. StiJl however, as I (obtained no transitional forms be- 

 tween tlie two, I sh(_)uld prefer to descriljc forms with bifurcate second- 

 ary veins as Asplcniiun llœsscrtl vav. irltithiciisis. 



Asplcniimi Uœs^crli occurs in tlie L ]>per and Lower Gondwjina 

 System of India, in the Kha3tic of Europe, Persia and Ton<iking, and 

 in the Lower Oolite of various countries. 



This fern is very comiiKjn at Yamanoi. l)eing' the most abundant 

 fossil next to DictiiopluiUum jupoiiiciiiii. 



2. Dictyophyllum ef. acutilobum Bymiit sp. 

 V\. XXX 11, Fiu-. 6. 



J >icti/(ijilii/(hnii. aciitilulniiii Schenk, Fuss. Ptlanzcii a. d. Albouvskctte, p. o, pi. 

 II, fig. 7. Foss. Flora d. Grenzschichten, p. 77, ph XIX fig. 3-5, XX, 1. Nathorst, 

 Ftoran vid liuganas och He'singborg, p. ]4, Hngunas aldre p]. I, fig. 8, p. 44, 

 Hüganäs yngrc, pi. I fig. 10-18, Heisingborg pi. I fig. (J-lO. Zeil]er, Exam, de la 

 flore foss. da Tongking, p. 311, pi. X, fig. 11. 



1) Feistuiantel, Fossil iïlora of tlie Soiilli. Hcirali. OiDuhcana Basin, p. 21», 1S82, Calcutta. 

 Heer, Bcitr. z'tr Jurajhra Ostsib. u. d. Aiiiiiii. 187G, p. 38. 



2) yaporta considers in his '' Piautes Jurassiques " (Palcunt. franc. Terr. Jurass., Végét- 

 aux) p. 301) C7«l(((io^)/(/c'>/.s ('yi.'./'ic/;/«»;^ Iiöj.<crli Prcsl as ideutlcal with Pecoiilcris ( Asijlcniuia) 

 whithiensis Br^t. 



