136 Palaeontologie. 



Arber, E. A. N., Con tribu tions to our knowledge ot the 



Floras of the Irish Carbon iferou s Rocks. Part. 11. ;Sci. 



Proc. Roy. Dublin Soc. XIII. 12. p. 162- 17b. pls. 10—12. 1912. 



Comparatively little is known of the Irish Goal flora, and the 



author Supplements the scanty previous records by a paper on the 



Ballycastle Coalfield. From this Coalfield some species of Lepidoden- 



dron and Sigillaria were recorded by Baily in 1871, and later, ot 



Sphenopteris. The present author records and describes, revising 



Baily's work - the following species: Archaeocalamites. %^., Adian- 



tites antiquus, Sphenopteris flahellata, Lepidodendron Veltheimi, L. 



Volkmannianum, L. cf. Rhodenmon and Stigmaria ficoides. The 



author concludes that this flora. clearly indicates the Lower Carbo- 



niferous age of the beds. M. C. Stopes. 



Arber, E. A. N., The fossil plants of the Forest of Dean 

 Coalfield. (Proc. Cotteswold Naturalists' Field Club. XVII. 3. 

 p. 321-332. pls. 37—39. 1912.) 



The plant remains in the productive Coal iVIeasures of the 

 Forest of Dean Coal field are offen extremely well preserved, and 

 this paper is designed to stimulate local coUectors, who are encou- 

 raged to obtain specimens. "The vaste-heaps, with their enormous 

 supply of shales . . . are infinitely more favourabJe for collecting 

 purposes than the roofs of the seams Underground. It is thus quite 

 unnecessary to go 'below ground'." A short resume follows, ol the 

 three main divisions of the seame with the species found in each. 



In all, 44 species are known from the Forest of Dean, none ot 

 them new to Britain, but some are very rare in other coalfields. 

 The beds belong to Upper Coal Measures, and there are many 

 points of comparison with the floras of the Radstock and Bristol 

 Coal fields. M. C. Stopes. 



Gordon, W. T., On the structure and affinities o f Diplo- 



labis römeri. (Trans. Roy. Soc. Edinburgh. XLVII. p. 711— 730. 4 



pls. 1911.) 



Material from the calciferous sandstone series (Culm) at Pettycur, 



showed stems, petioles and roots in connection. The stem has long 



internodes and is frequently branched, and the structure of the 



xylem is foUowed out in detail. The petiole-traces show in one part 



as Zygopteris, in another as Diplolabis. The root-traces have a diarch 



structure. Amongst the general conclusions, evidence is given that 



the plant had a creeping rhizome with erect petioles, as in Pteris 



aquilina; also that Diplolabis has its place amongst allied forms of 



the series Osmundaceae. The 4 plates includc 51 figures of anato- 



mical details. W. G. Smith. 



Groom, P. and F. J. Lewis. Note on the Internodes of 

 Calamites. With some Observations by F. J Lewis. (Journ. 

 Linn. Soc. XL. 278. Botany. p. 491—497. text figs. 1912.) 



The author notes that in the Calamites there is a recurrence 

 of Short internodes separated by longer ones, which though well 

 known, and recently brought into prominence by a paper by 

 Horwood, has had no satisfactory explanation. The author gives 

 measurements of several internodes and favours the view that there 



