92 



STEUCTURE AND DEVELOPMENT OF MOSSES AND FERNS. 



In the concluding chapter Mr. Campbell summarises his views 

 upon the inter-relationships of the Archetjoniat(B. As to the strength 

 of the arguments upon which these views are based, it must be left 

 to individual readers to judge. By enthusiasts they will be regarded 

 as convincing; by conservatives as fanciful; but by the majority 

 probably as suggestive and eminently helpful. Experts in morpho- 

 logy are certain to offer battle on the subject, and in fighting it out 

 among themselves they cannot fail to place the phylogeny of the 

 Archef/oniatce on a surer basis than it has yet attained. Mr. 

 Campbell rightly insists upon the important bearing which the 

 gametophyte and the sexual organs have upon the question, but 

 unfortunately these are still but little or not at all known in some 

 of the orders — e. g. Ophioijlosmcca: and Fsilotacea:. 



cen. I>. 



Fig. 240. — Development of the spores of Equischim maximum Lam. Suc- 

 cessive stages in the division of the nuclei, X 1200; cen. centrospheres ; nu. 

 nucleolus. 



In places the book shows signs of having been hastily edited — 

 e.g. on p. 189, 1. 7 from end, for "uses" read loses; p. 194, 1. 6, for 

 " JEorces " re-cxd faces, and 1. 8, for "forms six rows" read six rows 

 are funned ; p. 197, 1. 2, for "latter" xesid former ; p. 486, 1. 7, for 

 " tubes" read tubers; p. 158, 11. 2 and 4, for "tufa" read turf. On 

 p. Ill, "incubous" and "succubous" are incorrectly defined. 



