May, 1920] PALEOBOTANY 229 



1610. IIowk, M. A. Tertiary calcareous Algae from the is'ands of St. Bartholomew, 

 Antigua and Anguilla. Carnegie Ii ashington [D. C] Publ. 291: 9-19. PI. 1-6. L919.— 

 Records Lithoporella melobesioidea Foslie, a recenl species of the Maldives and found fossil in 

 New Guinea, from the upper Oligocene Anguilla formation of Anguilla, from the middle 

 Oligoeene of Antigua, and from the upper Eocene or lower Oligocene »f St. Barthi 1 mew. 

 Describes the following new species: Archoeolithamnium affine, Lithothamni um 

 and IAthophyllum f molarc from the middle Oligocene < f Antigua; and lAthophyllum homo- 

 genium from the upper Eocene or lower Oligocene of St. Bartholomew. — E. W. Berry. 



1611. Kiustox. R., and W. II. 1 ■■ On Old Red Sandstone plants showing structure 

 from the Rhynie Chert Bed, Aberdeenshire. Pt. I. Rhynia Gynne-Vaughani. Tram 



Soe. Kdiuborough 51: 761-784. t pi. 1917. Describes morphology of the Idesl Land plant 



whose structure is at all completely known. Rhynia comes from a chert band in thi Dev< o- 

 ian of Scotland, the chert representing silicified beds i f peat, made up almost entirely of the 

 prostrate stems and rhizomes of Rhynia. Rhyni i \> as leafless and rootless and consisted 'jf 

 a branched underground rhizome attached to the soil by rhiz ids, bearing slender f< rked 

 leafless erect branches about 8 inches high. The reproductive organs are represented by 

 large homosporous cylindrical sporangia at the end of stout stalks which the authors interpret 

 as terminal portion of the main stem rather than of a special branch. Comparisons are 

 instituted with the Devonian Psilophyton and with the recent Psilotales and the authors 

 propose a new class — the Psilotales for Rhynia and Psilophyton, diagnosed by the sporangia 

 being at ends of certain branches of the stem without any relation to leaves or leaflike organs. 

 — E. W. Berry. 



1612. Knowlton, F. H. Relations between the Mesozoic floras of North and South 

 America. Geol. Soc. Amer. Bull. 29:607-614. (1918) 1919.— Author discusses the known 

 Triassic, Jurassic and Cretaceous floras from the two continents and concludes that 

 there is little demonstrable relationship between the Triassic and Jurassic floras largely 

 because of lack of knowledge of these floras in the greater part of the area, and that there is 

 direct and strong evidence of land connection in what is known of the flora of mid Cretaceous 

 or early Upper Cretaceous times. — E. W. Berry. 



1613. Nathorst, A. G. Ginkgo adiantoides (TJnger) Heer im Tertiar Spitzbergens nebst 

 einer kurzen iibersicht der ubrigen fossilen Ginkgophyten desselben landes. [Ginkgo adian- 

 toides dominant in the Tertiary of Spitzbergen, and a brief review of related Spitzbergen fossils.] 

 Geol. Foren. Forhandl. 41:234-248. fig. 4- 1919. — Describes and figures Ginkgo adiantoides 

 from Spitzbergen and supposedly related remains referred to the genera Baiera, Czekanow- 

 skia, Phoenicopsis, and Feildenka (or Torellia, as Nathorst shows it should be called). 

 — E. W. Berry. 



1614. Renier, A. Quelques nouveaux echantillons de vegetaux a structure conservee du 

 Westphalien de la Belgique. [New plant types from structures preserved in the Westphalian 

 of Belgium.] Soc. geol. Belg. Ann. 41: B332-236. 1919.— Records specimens of Lepidoden- 

 dron, Trigonocarpus, Lepidostrobas, Medullosa, Mesoxylon and Stigmaria with more or less 

 structure preserved, in calcareous nodules in the Carboniferous marine shales of the Belgian 

 Coal Measures. — E. W. Berry. 



1615. Seward, A. C. Recent Paleobotany in Great Britain. Science 50: 43-48. 1919.— 

 A succinct account of British contributions to our knowledge of fossil plants during the past 

 five years. — E. W. Berry. 



1616. Trelease, Wm. Bearing of the distribution of the existing flora of Central America 

 and the Antilles on former land connections. Geol. Soc. Amer. Bull. 29:649-656. (1918) 

 1919.— Describes the botanical break between the floras of the Greater and Lesser Antilles. 

 A number of plant groups are discussed in some detail, namely, the oaks (Quercus), Xolineae, 

 Yucceae, Phoradendron, Furceaea and Agave. Author concludes that the oaks afford no 



