194 Ah' Seward, Notes on the Bunhury Collection [Mar. 12, 



scar. As a matter of fact the leaf-scars occupy depressions, and 

 there are no typical lepidodendroid cushions. The real nature 

 of the specimen is best seen by taking a cast of the type specimen; 

 we have then a surface view of the sigillarian stem, the leaf-scars 

 project slightly, and short downward curved ridges extend for a 

 short distance from the two lateral angles. The general appear- 

 ance is very like that figured by Zeiller in 8. Brardii^. 



Kidston^ compares his species,. >S^. McMurtriei, with Bunbury's 

 specimen, and points out that in the description of the latter there 

 is nothing said with regard to the form of the "lateral cicatricules" 

 on the leaf-scar; these are not very well marked in the specimen, 

 but sufficiently so to show that they are of the typical elongated 

 oval form, and are situated relatively to the leaf-trace scar 

 similarly to those in Kidston's species. The leaf-trace scar dis- 

 tinctly bears out Bunbury's description that each is made up of 

 "two vascular points, placed close together, and often confluent." 



My own impression is that Bunbury's specimen should be 

 referred to Brongniart's species, Sigillaria Brardii ; in any case 

 the specific name tumida would be unsuitable as founded on an 

 erroneous interpretation of the fossil. 



Baiera gracilis Bunb. 



Quart. Journ. Geol. Soc. Vol. vii. 1851, p. 182, PI. xii. fig. 3. 



Scarborough, Torks. Oolite. 



Bunbury describes this species as not uncommon in the Lower 

 Sandstones of the Scarborough series. He considers it to be 

 closely allied to Cyclopteris digitata L. and H. ; it had previously 

 been designated Schizopteris gracilis by Bean (MS. name). Bun- 

 bury includes the plant among fossil ferns, and compares it with 

 Acrostichum peltatum Sw. Zigno^ prefers to make use of the 

 generic designation Cyclopteris. In the third edition of Phillips' 

 " Illustrations of the Geology of Yorkshire " an inferior woodcut 

 is given of Bunbury's species*. Saporta^ figures several English 

 examples of Baiera gracilis, and holds the view that the genus 

 Baiera is closely allied to Ginkgo. The association of seeds and 

 flowers with certain forms of Baiera, shows that at all events 

 some species must be assigned to the Gymnosperms; it may, 

 perhaps, be found that some of the dichotomously forked Jurassic 

 leaves present a close resemblance to the recent Cycadean genus 

 Macrozamia. In the Royal Gardens, Kew, there are some plants 



1 Zeiller loc. cit. PL xiv. 



2 Loc. cit. p. 360. 



3 Flor. foss. Oolith. Vol. i. 1856, p. 104. 



4 p. 199. 



5 Pal. Franc?. Plantes Jurassiques, Vol. in. 1884, p. 277, PI. clvii. fig. 4 and PI. 

 clviii. figs. 1—3. 



