70 ON BAIERA, ETC. 



the Geology and PaltPoiitology of Queensland and New Guinea, 

 p. 319, Mr. R. Etlieridge, jun., rightly removes the species from 

 the ferns to the conifers, and places it under the genus Baiera, 

 F. Br. An examination of a number of specimens in the 

 museum of the Geological Survey of Queensland, and more 

 particularly of a plant specimen recently obtained from Petrie's 

 <5uarry, by Messrs. E. Heden and R. L. Jack, jun.,* proves 

 that the Rev. Author's plant is not properly placed under Baiera, 

 as the leaves are simply palmately lobed, but not dichotomously 

 branched or divided, the segments are not narrow linear, and 

 the veins m each segment may number six to ten. In all these 

 points the plant differs from tlie well known Baiera Mumteriawi, 

 and the genus Baiera generally. 



The following is the Rev. .J. E. Tenison- Woods' original 

 description : — " -Jeanpaulia bidens, n.s., Plate 4, fig. 3. Frond 

 broadly flabellate ; segments somewhat short, often becoming 

 broader towards the apex, and ending in a short wide bifurca- 

 tion, or in a curved, falcate, acute or acuminate point ; veins not 

 conspicuous, numerous (6 to 10), parallel, not branching. The 

 longest of the segments in the specimen figured is 55 mm., and 

 the width is from 8 to mm." To this must now be added : — 

 " Leaf segments 5 to 7, gradually narrowing to the base, 

 closely and digitately inserted at the apex of a slender petiole, 

 which is one-third shorter than the segments themselves." 



On one of the specimens was found an impression of a 

 female amentum, with four cupular bracts, each solitary on 

 short branchlets of the common pedicel, bearing the drupe-like 

 seeds, which were not more than 2 lines long. Without further 

 proof these cannot be accepted as the fruits of G. bidens. 



The plant should be known as Ginkgo bidens. Ten. Woods; 

 and its nearest allies are G. (Salisburia) sibirica, Heer, G. 

 lepida, Heer, and G. Schmidtiana, Heer ; fossil plants from 

 Jurassic beds, Ust-Balei, Eastern Siberia. 



In the museum of the Geological Survey of Queensland 

 the following belong to this species : — Nos. 9 (a), 9 (b), 9 (c), 

 81, and 82 ; and, doubtfully, 41(a), 41 (b), and 47 (a). These 

 are all from the Ips\\ich Formation, Permo-Carboniferous Series, 

 Nos. 81 and 82 from Petrie's Quarry, and the others from 

 railway cuttings at Oxley or Yeronga. 



* Coll. University of Sydney 



