Palaeontologie. 649 



the author to be of Silurian age. The geological evidence in Support 

 of this is actually much less conclusive than it appears cm paper, 

 and the supposed Silurian plants includc species of the gc-nera 

 Alethopteris, Neuropteris. Aneimites, Whittleseya, Cardiocarpotij Cor- 

 dait'es etc. which are sufficiently characteristic of higher deposits to 

 arouse a critical attitude tovvards the author's stratigraphical con- 

 clusions. M. C. Stopes. 



Oliver, F. W., On the Diversity of Structures termed 

 Pollen-Chambers. (Rept. Brit. Assoc. Adv. Sei. Sheffield, p. 784. 

 1910.) 



Abstract of paper read at the Association meeting to show that 

 several of the less known Coal measure seeds which belong presu- 

 mably to the Lygiuode)idreae have more complex nucellar apices 

 than even Lagenostoma or Physostoma. In these seeds, viz Conostoma 

 oblongum, C. anglogermanicum and perhaps Gnetopsis a second Cham- 

 ber is provided below the pollenchamber. In Trigonocarpus and 

 modern Ginkgo and Cycads it is suggested that perhaps the acting 

 "pollenchamber" may correspond to this, and the "nucellar beak" 

 be a vestigeal primary pollenchamber. M. C. Stopes. 



Rogers, J., A Synopsis of the fossil flora and fauna of the 

 Upper Culm measures of North-West Devon. (Trans. Rept. 

 Devonshire Assoc. Adv. Sei. Lit. Art. XLII. pl. 538—564. plate. 

 Plymouth 1910.) 



A description of the Upper Culm (Carboniferous) deposits 

 trom North-West Devon, giving several lists of the species found 

 in the different local exposures. There are no botanical descriptions 

 of the plants. M. C. Stopes. 



Savile, L. H., Note on submerged tree stumps discovered 

 in Bombay Harbour. (Journ. Bombay Nat. Hist. Soc. XX. 3. 

 p. 894—895 one textillus. 1911.) 



Records the unearthing of several Post-Tertiary trees in Bom- 

 bay Harbour. They merely add further evidence in support of pre- 

 viously published conclusions of Mr. Hart, and afford evidence that 

 the last subsidence was one over 40 ft. and that there was dry land 

 \ mile from the foreshore, presumably since the appearance of man 

 in the neighbourhood. M. C. Stopes. 



Seward, A. C, The Jurassic Flora of Yorkshire. (Naturalist 

 N°. 648. Jan. 1911, p. l-8andFeb. 1911, N°. 649. p. 85—94. pl.V— VI.) 



The Presidential Address to the Yorkshire Naturalists' Union, 

 giving a semi populär summary of what is known of the Jurassic 

 flora of the Yorkshire coast, and its comparison with other floras. 

 The concluding part of the address deals with the questions of 

 wider interest connected with the flora, its geographical distribution 

 in the past, its present allies, the general aims of palaeobotany, etc. 



M. C. Stopes. 



Stephens, T., Notes on the oecurrence of a fossil tree em- 

 bedded in drift on the North-West coast of Tasmania. 

 Papers Proc. Roy. Soc. p. 82—84. Tasmania 1909.) 



Records the finding of a large, semi-petrified tree stump trom 



