26 



39,208. PI. IX, Fig. 7. 



This example occurs on the same slab with the leaf of B. gracilis 

 represented in Fig. 5 ; it has segments intermediate in breadth 

 between V. 3682 (Fig. 6) and the narrower forms of B. gracilis. 



39,283. Text-fig. 46. 



A tuft of partially expanded leaves similar to B. microphylla 

 (no doubt a young leaf of B. Lindleyana), as figured by Phillips. 

 This specimen is practically identical with some of the fossils 

 figured by Heer as examples of Czekanoicslcia. 



3. Baiera Phillipsi, Nathorst. 



[Ofvers. k. Veten. Akad. Forhand. p. 76, 1880.] 



(PI. IX. Fig. 4 ; Text-fig. 47.) 



1829. SpJuitoptnis longifolia, Phillip*, Geol. Yorks. p. 148, pi. vii. fig, 17. 

 1864. Baiera longifolia, Leckeabj, Quart. Journ. Geol. Soc. vol. xx. p. 76. 



Cf t & o ptt rit <li(/',ti'tn, var. ninjur, Sclunk, Pakcontograph. pi. xlix. fig. 2. 

 1875; Cyclopteris longifolia, Phillips, loc. cit. p. 200, pi. vii. fig. 17. 

 1880. Baiera Pliillipsli, Xathorst, Berattelse, p. 76. 

 1885. ? Salisburia lepida, Dawson, Trans. K. Soc. Canada, pi. ii. fig. 2. 



? Baiera longifolia, ibid. pi. ii. fig. 5. 

 1892. Baiera loxgifolia, Fox-Strangways, Tab. Foss. p. 137. 



Type-specimen. York Museum. (Text-fig. 47.) 



The specimen on which Phillips founded the species Sphenopteria 

 longifolia is shown in Text-fig. 47. If this drawing, which was 

 carefully made from the type-specimen, be compared with Phillips' 

 figure, it will be seen to bear a somewhat closer resemblance to 

 a leaf of the Baiera type than is suggested by the original 

 illustration. The example shown in Fig. 4, PL IX., is practically 

 identical with the type-specimen. There is but little difference 

 between the present type of leaf and some of the more deeply 

 dissected and narrower lobed forms of Ginkgo digitata (of the 

 shape usually re fe rred to Ginkgo Huttoni) on the one hand, and 

 Baiera gracilis on the other. It is convenient, however, to retain 

 a definite specific name for this form of leaf, with its linear and 

 bluntly terminated segments, as it constitutes a fairly distinctive 

 type. The specific name longifolia was applied by Pomel to a leaf 

 of somewhat similar but not identical form, which he named 



