364 



Referate. 



supplemented. Equisetites Lyelli (Mant.), Lycopoditcs Teilha?-di sp. nov., Sfla- 

 ginelUtcs Dawsoni sp. nov., Sagenopteris Mantdli (Dunk.), S. aaitifolia Sew. 

 Matonidiiim Goepperti (Ett.), Hausmanina pelUtieri sp. nov^, Ruffordia Goepperti 

 (Dunk.), Pelletieria valdcmis gen. et sp. nov., Cladophhius browniana (Dunk.), 

 Onchyopsis Mantelli (Brongn.), Teilhardia valde/isis gen. et sp. nov., Dicliopteris 

 delicatula sp. nov., Williamsonia carrutliersir Sew., Otozamites klipsteinii (Dunk.), 

 Ctenis sp., Conites bcrryi sp. nov., Araiicarites pippingfordensis (Ung.), Pinites 

 sühiisi Sew., Sphenolepidium kurriaiuiui (Dunk.). 



Of these by for the most interesting is the record of a new species of 

 Hausmannia. The genus was described by DUNKER, and is found in several 

 mid- European deposits, but has not hitherto been recognised in the Wealden 

 of England. The specimens now described are exceedingly good and leave 

 no doubt as to the correctness of the description. 



A complete list of all known British Wealden plants follows with 

 critical notes on some of the species, and the hkeness of the Wealden flora 

 to the corresponding floras in America is noted. It is also pointed out 

 that is not easy to separate this flora from the Jurassic; but the author 

 suggests that "Onchxcpsis mantelli, Wcichsclia mantdli and a few other types 

 may be described as useful plants pointing to a Wealden age". 



M. C. StoPES. 



Gordon, W. T. "On Rhetinangium arberi, a new genus of Cycadofilices from 

 the Calciferous sandstone series." Trans. Roy. Soc. Edin. 48, pp. 814 

 — 825, pis. I — III. Edinburgh 1913. 

 This paper consists chiefly of a detailed anatomical description of a new 

 genus of fossil stem. The fossil is a member of the Cycadofilices, a group 

 which is of great interest and importance, connecting the ferns and cycads, 

 and the new genus is of particular interest because it is from a lower horizon 

 than most of the genera of Cycadofilices of which the anatomy is known. 

 The specimens of Rhetinangium on which the genus is founded, come from 

 the Calciferous Sandstone of Scotland, which is of Lower Carboniferous age. 

 At first sight the stem appeared so much to resemble Heterangium that it 

 was thought to be a new species of that genus. The exarch nature of 

 the xylem however at once separates it from Heterangium. The genus 

 Megaloxylon appears to be the one most nearly allied to the newly described 

 form, but it does not entirely coincide with it. Rlietinangiutn is simpler 

 than Megaloxylon, but as it occurs in rocks of earlier stage, this is what one 

 might expect if the two plants belong to the same series. The details of 

 the anatomical features of the plant are illustrated by fine photographs. 



M. C. Stopes. 



