O INTRODUCTION. 



Williamsonia gigas (L. & H.). (Figured specimens in the "Whitby Museum.) 



= W. gigas. 



Zamitet lanceolatus, L. & H. = Podozamites lanceolatus. 

 Pturophyllum pectinoideum (Phill.). ( = Cycadites pectinoide, Phill., 1829.) 



= Williamsonia pecten. 



P. medianum, Leek., ex Bean MS. = Nilssonia mediana. 

 P. pecten (Phill.) (= Cycadites pecten, Phill., 1829) = Williamsonia pecten. 

 P. eomptum, Phill. (= Cycadites comptus, Phill., 1829) = Nilssonia compta. 

 P. angustifolium, Leek., ex Bean MS. (Type-specimen , 



in the Leckenhy Coll., Cambridge.) f = .y. mediana (Leek., 



P. tenuicaule, Phill. ( = Cycadites tenuicaulis, Phill., ( ex Bean MS.). 



1829) 



? P. Nilssoni, L. & H. ) A 



> = Anomozamites Nilssom (Phm.). 

 r P. minus, L. & H. ) 



P. rigidwn, Phill. 



Cycadites zamioides, Leek. (Type-specimen in the Leckenby Coll., Cambridge.) 



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

 Araucarites Phillipsii, Carr. = Araucarites Phillipsi. 

 Braehyphyllum mamillare, Brongn. = Brachyphyllum mamillare. 



B. setusum, Phill. = Cheirolepis setosus. 

 Thuytet expanses, Sternb. = B. mamillare. 



Walchia Williamsonis (Brongn.) (= Lycopodites uncifolius, Phill., 1829, and 

 " spike of Lycopodites" ; original of latter, which is in the York Museum, 

 = male flower) = Pagiophyllum Williamsoni. 



Cryptomerites divaricates, Bunb. \ ^ 



. .. T.-ii /, ., . I = Cryptomerites divancatut, 



C. ngidus, Pnili. (A specimen very similar to > R V. 



the type is in the Manchester Museum.) ) 

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

 Sphareda paradoxa, L. & H. (and "winged seed," Phillips, 1829) = Beania 



gracilis, Carr. 

 " Unknown leaves," Phillips, 1829, pi. vii. fig. 23. (Figured specimen in the 



York Museum.) = ? Ginkgo digitata (pollen-sacs of male flower). 

 " Small vegetable bodies in groups," Phillips, 1829, pi. vii. fig. 25. (Figured 



specimen in the York Museum.) = ? small seeds. 



In 1829 there also appeared an important paper by Murchison 

 On the Coalfield of rora, in Sutherlandshire, and some of the 

 stratified deposits in the North of Scotland. 1 Murchi son's attention 

 was first called to this district by Buckland & Lyell, who visited 

 Brora in 1824, and were led to express the opinion that the 

 Sutherlandshire Coalfield should be included in the Oolite division 

 of the Jurassic system. Konig contributed some notes on an 

 equisetaceous plant, which he named Oncylogonatum carlonarium 



Murchison (29). 



