ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 479 



BOTANY. 



CRYPTOGAMS. 



Pteridophyta. 

 (By A. Gepp, M.A., F.L.S.) 



New Groniopteris from Middle Eocene.* — E. W. Berry describes a 

 new species of fossil Goniopteris, from the Middle Eocene, giving it the 

 name G. claiborniana ; it occurs rather commonly in some Tertiary clays 

 of Louisiana and Mississippi. He discusses the venation of the typical 

 pinnse with care, and points out the differences to be found in pinnge 

 with shallow and deep lobulation of the margin respectively. 



Lycopodiacese of Sweden. f — H. V. Rosendahl publishes a systematic 

 account of the Lycopodiacea3 of Sweden, with diagnoses of all the 

 varieties and forms, several of which are new to science, and illustrates 

 most of them with photographs. Lycopodhmi alpinum has one variety ; 

 L. annotiniim three vars. and twelve forms ; L. clavatum three vars. and 

 eleven forms ; L. complanatum one sub-species and eleven forms ; L. 

 inundatum one var. and one form ; L. Selago six vars. ; Isoetes lacustris 

 four vars. and five sub- vars. 



Bryophyta. 



(By A. Gepp.) 



Development of Archegonium in Catharinea.| — G. S. Bryan gives 

 an account of the development of the archegonium of Catherinea 

 angustata Brid., with special reference to the origin of the canal row in 

 mosses, since, as he shows, the views of previous authors are very con- 

 tradictory. The summary of his results is as follows : — 1. The arche- 

 gonia of C. angustata begin to develop in April. 2. The first-formed 

 archegonium arises from the apical cell region, but whether from the 

 apical cell itself or from one of its immediate segments must be de- 

 termined later. 3. In the earlier stages of development the young 

 archegonium is formed by the activity of an apical cell with two cutting 

 faces, producing a filament of a few cells. 4. The archegonium proper 

 is initiated by the appearance in the terminal cell of three oblique walls, 



* BuU. Torrey Bot. Club, xliv. (1917) pp. 331-5 (1 pi.). 

 + Svensk. Bot. Tidskrift, xi. (1917) pp. 39-59 (figs.). 

 X Bot. Gaz., Ixiv. (1917) pp. 1-20 (8 pis. and 1 fig.). 



