62 2 MOSSES AND FERNS 



cerotaceae from the Hepaticae, and he regards the order An thocero tales 

 simply as an order of Hepaticae co-ordinate with the Marchantiales 

 and Jungermanniales. 

 P. i6i. For Leitgeb (2), read (4). 



CHAPTER V 



P. 166. Cavers (9), in his review of the Musci, divides the Bryales 

 into four groups, which he thinks should have the rank of orders, viz., 

 Tetraphidales, Polytrichales, Buxbaumiales, and Eu-Bryales. 



P. 170. In submerged plants the whole stem consists of uniform 

 tissues, all the cells except the innermost ones having chlorophyll. 



P. 173. Oltmanns (i) has made a careful study of the mechanism 

 by which water is taken up by Sphagnum. In most species this is 

 effected by capillary action, due to the numerous pendant branches, 

 which are closely appressed to the stem, and between which the water 

 ascends by capillarity. In species like S. cymbifolium, however, in 

 which the cortical cells contain pores and fibres on their walls, these 

 cortical ceUs play an important role in the absorption and conduction 

 of water. 



P. 177. The development of the archegonium has been carefully 

 studied by Bryan (i). It shows some interesting suggestions of the 

 Liverwort-archegonium in having the apical growth much less 

 marked than in most Mosses, and in having all of the neck canal-cells 

 formed from the division of a primary canal-cell. There are eight or 

 nine canal-cells. "Abnormalities, such as double venters, multiple 

 eggs, etc., are of common occurrence." 



P. 182. For (Ruhland (2) ), read (i) ). 



CHAPTER VI 



P. 195. The statement that Funaria is dioecious is incorrect. The 

 antheridial shoots develop first, and later, as lateral branches from 

 these, the shoots bearing archegonia arise. (See Boodle (7).) 



P. 197. The spermatogenesis of the Mosses has received a good 

 deal of attention in recent years. The latest contributions are those 

 of Woodburn (3) and Allen (2), who investigated the spermato- 

 genesis in Mnium affine and Polytrichum juniperinum. 



The development of the spermatozoid is much like that of other 

 Bryophytes that have been examined. In Mnium there are six 



