636 MOSSES AND FERNS 



sembles that of Osmunda. In G. lavigata the antheridium may reach 

 a diameter of 100 /n, and contain several hundred sperm-cells. 



P. 369. The cotyledon in G. pectinata, G. dichotoma, and G. 

 IcBvigata shows a prolonged apical growth like that of the leaves of the 

 adult sporophyte. The early roots are diarch. 



P. 372. Compton's work on M. sarmentosa (Compton (i) ) shows 

 that the anatomy of this species -is somewhat simpler than that of 

 M. pectinata, but is not essentially different. 



P. 372. Shreve (i) has made a special study of the physiology of 

 the Hymenophyllaceae. 



P. 379. For Boodle (i), read (2). 



P. 383. See the recent paper by Georgevitch (i). 



P. 384. In a recent paper by Miss Twiss (i), it is stated that in 

 Aneimia Phyllitidis the two lobes of the heart-shaped pro thallium are 

 of equal size. 



P. 385. For Thomas (i), read (3). 



P. 388. The sterile leaves of the majority of the species of Schizma 

 are simple, as they are in S. pusilla. 



P." 388. The development of the sporangium in Aneimia and 

 Lygodium have been examined by Stevens (i), and Binaford (i). 

 Their results confirm the work of Prantl, but add some details to the 

 structure of the tapetum and spore-division. In both genera the 

 tapetum is two-layered. In Lygodium the cells often show two nuclei, 

 and Only the inner layer of tapetal cells is broken down. In Aneimia 

 Phyllitidis, Stevens found that the whole tapetum becomes broken 

 down. 



P. 395. The relationships of the families of the Filices to each 

 other, and especially the interrelationships of the Polypodiacea;, are 

 still by no means settled. Among the recent contributions to this 

 subject, may be mentioned especially the important series of papers 

 by Professor Bower on the phylogeny of the FiUcales (27-31). 



CHAPTER XI 



P. 398. Two important contributions on the gametophyte of 

 Salvinia have recently been published : (Arnoldi (2) ; Yasui (i) ). 



P. 398. Yasui's account of the development of the male gameto- 

 phyte confirms Belajeff's statement. He considers that there are 

 two antheridia formed, each containing four sperms. The results of 

 Arnoldi's investigation also confirm Belajeff's conclusions. AmoMi 



