INTRODUCTION. 



Peeopteris undulata. Phill. ) ,-,, , , , ,. , ,./. ,- / T o TT \ 

 > = Cladophlebis lobifoha (L. & a..}. 

 P. inconstant, Phill. j 



P. Haiburnensis, L. & H. = C. haibwrnensis. 



P. recentior, Phill. = Todites Williamsoni (Brongn.). 



Sphenopteris Murrayana (Brongn.) = S. Murrayana. 



S. athyroides (Brongn.) = ? Coniopteris hymenophylloides (Brongn.). 



S. modesta, Leek. = S. princeps, Presl. 



S. nffinis, Phill. = Coniopteris hymenophylloides (Brongn.). 



S. socialis, Phill. = C. hymenophylloides. 



S. dissocialis, Phill. = C. hymenophylloides. 



S. quinqneloba, Phill. = C. quinqueloba. 



S. hymenophylloides, Brongn. = C. hymenophylloides. 



S. crenulata, Brongn. = ? Coniopteiis hymenophylloidet. 



S. arbuscula, Phill. = Sphenopteris Murrayana (pars), Brongn. 



S. arbuscula, var. = Coniopteris quinqueloba (Phill.). 



S. denticulata, Brongn. = ? Sphenopteris Williamsoni, Brongn. 



S. Williamsoni, Brongn. (= S. digitata, Phill., 1829; figured specimen in the 



York Museum) = S. Williamsoni. 

 S. muscoides, Phill. (Type-specimen in the York Museum.) = Conioptei-a 



hymenophylloides. 

 S. Jugleri, Leek. (Type-specimen in the Leckenby Coll., Cambridge.) = Stt/ordia 



Goepperti (Dunk.). 



"A skeletonized fern-branch." Phillips, 1829, pi. viii. fig. 18. = Inde- 

 terminable fern. (Figured specimen in the York Museum.) 

 Ctenis falcata, L. & H. (= Cycadites nulcicatths, Phill., 1829; type-specimen 



? in the York Museum) = Ctenis falcata. 

 Odontopteris Ltckenbyi, Leek., ex Bean MS. (Type-specimen in the Leckenby 



Coll., Cambridge.) = Plilozawites Leckenby i. 



Tumpanophora racemosa. L. & H. ) /t / i i H -j 



\ = Coniopterts nymenophylloidts. 

 f. simplex, L. & H. 



Tree-fern stem = ? tree-fern stem. 



Olozamites Beanii (L. & H.). (Figured specimen in the Leckenby Coll., 



Cambridge.) = Otozamites Beani. 

 0. tenuatus (Bean MS.) = 0. Bunburyanus, Zign. 

 0. parallelus, Phill. = 0. paralltlus (Phill.). 

 0. obtusus (L. & H.) = 0. obttMus, var. oolitiau. [The type-specimen of 



0. obtusus (L. & H.), from the Lias of Axminster, which is in the Oxford 



Museum, is not specifically identical with the Yorkshire plant.] 

 0. yraphicus, Leek., ex Bean MS. (Type-specimen in the Leckenby Coll., 



Cambridge.) = 0. graphicus. 

 0. acuminatus (L. & H.) = 0. acitminatus. 

 0. gramineus, Phill. (The original of Zigno's figure is in the Leckenby Coll., 



Cambridge.) 

 0. lanceolatus, Phill. (= Cycadites lanceolatut, Phill., \ 



1829) f = Otozamites acuminatus 



0. latifolius (Phill.) ( = Cycadites latifolius, Phill., | (L. & H.). 



1829 ; type-specimen in the York Museum) / 

 0. aracilis (Leek., ex Bean MS.). (Type-specimen in the Leckenby Coll., 



Cambridge.) = Wtlliamionia ptcten (Phill.). 



