1 6 rSTEODTTCTION. 



Cryptomerites rigidus, Phill. = Cryptomerites divaricatus, Bunb. 



Clenis falcata, L. & H. = Ctenis faloata, L. & H. 



Cycadites zamioides, Leek. = Taxites zamioides (Leek., ex Bean MS.). 



CzelcanowsMa Seeri, Nath. 



C. rigida, Heer = Czekanowskia Murrayana (L. & H.). 



C. setaoea, Heer. 



Ginkgo digitata, Brongn. = Ginkgo digitata (Brongn.) . 



G. Suttoni, Sternb. = G. digitata (Brongn.), Tar. Suttoni. 



G. whitbiensis, Nath. = G. whitbiensis, Nath. 



Nilssonia angmtifolia, Bean MS. = Nilssonia mediana (Leek., ex Bean MS.). 



N. compta, PhiU. = If. compta (Phill.). 



N. mediana. Bean MS. | ^ ^_ ^^^.^„^_ 



N. tenuicauUs, Phill. J 



JV. tenuinerviSj Nath. = JV. tenuinei'vis, Nath. 



Otoznmites acuminatus, L. & H. = Otozamites acuminatus (L. & H.). 



0. Beanii, L. & H. = 0. Beani (L. & H.). 



0. distans, Nath. 



0. gracilis, Phill. = Williamsonia pecten (PhiU.). 



0. gramineus, Phill. 



0. graphicus, Bean MS. = 0. graphicus (Leek., ex Bean MS.). 



0. lanceolatus \ ^ ^_ aciminatm (L. & H.). 



0. latifohus, Phill. ) ^ ' 



0. medianns, Leek. = 0. Beani (L. & H.). 



0. obtusus, L. & H. = 0. obtusus, var. ooliticus. 



0. parallelus, Phill. 



0. tenuatus, Bean, sp. = 0. Bunburyanus, Zign. 



Fodozamites distans, Preslt \ 



P. lanceolatus, L. & H. > = Fodozamites lanceolatus (L. & H.)i 



F. lanceolatus, var. minor, Schenk ' 



Fterophyllwrn rigidum, Phill. 



Ftilozamites Leckenbyi, Bean, sp. = Plilozamites Leckenbyi (Leek., ex Bean MS.). 



Schizolepis, sp. 



Solenites furcata, L. & H. = Baiera Zindleyana (Schimp.). 



S. Murrayana, L. & H. = Czekanowskia Murrayana. 



Spherceda paradoxa, L. & H. = Beania gracilis, Carr. 



? Splicenozamites undulatus, Sternb. = Williamsonia gigas (L. & H.). 



Taxiles brevifolius, Nath. 



T. laxus, Phill. = Taxites zamioides (Leek., ex Bean MS.). 



Thuytes expansus, Sternb. = BrachyphyUttm mamillare, Brongn. 



Walchia Williamsonis, Brongn. = Fagiophyllum Williamsoni (Brongn.). 



Williamsonia gigas, L. & H. = Williamsonia gigas (L. & H.). 



W. Aa,fe;«, Bean MS. | ^ ^ ,,^,„ (pim.). 

 W. pecten, Phill. ) j- \ i 



A glance at a geological map of England reveals the existence of 

 a band of Jurassic rocks stretching diagonally across England from 

 the coast of Yorkshire to Dorsetshire in the south-west. Between 

 the Yorkshire strata and those of corresponding age in the midland 



