PLAKT8. 331 



due to the speedy decay of the large vascular tubes or utricles of which 



it was composed. C. E. De K. 



Beongniart, Ad. ^fitudes sur les graines fossiles trouvees k Tetat 



silicifie dans le terrain houiller de Saint-Etienne. Compt. Rend. 



vol. Ixxviii. pp. 1-20 ; in full in Ann. Sci. Nat. Bot. ser. 5, vol. xx. 



(1875). . 



Reviews the whole of the forms, and groups them into seventeen 



genera — Cardiocarpus, Bhabclocarpus, Diplotesta, Sarcotaams, Lepto- 



caryum, Taxospermum^ Pachytesta, TrigonocarpuSj Tripterospermum, 



Plychotesta, Hexapterospermum^ Polypterospermum, Eriotesta, Poly- 



lophospermum, Cfodonospermum, Stephanospermum, and JEtheotesta. 



W. C. 

 Castracane, l'Abb£. Sur I'existence des Diatomees dans differentes 

 formations geologiques. • [Presence of Diatoms at different geo- 

 logical horizons.] Compt. Rend. t. Ixxix. p. 52. 

 A short resume of two detailed Italian papers. The author found 

 diatoms in every kind of coal examined. He argues thence that all 

 fossil fuels are due ' to a subaqueous formation very analogous to that 

 of peat. The writer has shown that the Palaeozoic Diatomaceae are 

 indistinguishable specifically from existing forms. G. A. L. 



Christison, Sir R. Supplementary notice of the Fossil Trees of 



Craigleith Quarry. Proc. Roy. Soc. Edin. vol. viii. pp. 241-243. 

 Gives a list of the stems of trees found, and an account of their 

 mineral condition. 



. Note on the Submerged Fossil Trees of Granton Quarry. 



Proc. Roy. Soc. Edin. vol. viii. pp. 377, 378. 

 These specimens agree in structure and mineral condition with those 

 described from beds of the same age and character at Craigleith. 



CRi:PiN, Franqois. Description de quelques plantes fossiles de I'etage 



des Psammites du Condroz (Devonien superieur). [Fossil plants 



from Condroz sandstones (U. Devonian).] Bull. Ac. roy. Belg. 



2 ser. t. xxxviii. pp. 356-366, 3 plates. 



The new species described are Psilophyton condimsorum and Spheno- 



pteris Jlaccida, from Evieux, besides two others. 



. Fragments paleontologiques pour servir k la flore du terrain 



houiller do Belgique. [PalaDontological fragments towards a flora 

 of the Belgian Coal Measures.] Bull. Ac. roy. Belg. 2 ser. t. xxxviii. 

 no. 11, 13 pp., 2 plates. 

 Two new species, Pinnularia sphenopteridea and Calamostachys equi- 

 setiformis, are figured and described. 



Davidson, Rev. G. On a Diatomaceous Deposit in the District of 

 Cromar, Aberdeenshire. Trans. Bot. Soc. Edin. vol. xii. pp. 05, 66. 

 A list of 83 species of recent freshwater Diatomaceeo. 



Dawson, Principal J. W. Note on Fossil Woods from British 

 Columbia collected by Mr. Richardson. Amer. Journ. ser. 3, 

 vol. vii. pp. 47-51. 



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