620 MOSSES AND FERNS 



P. 119. The following classification of the Acrogynae is taken with 

 some slight changes from Cavers' recent resume of the Bryophytes 

 (Cavers (9) ). It is based upon Spruce's work (Spruce (2) ). 



A. Leaves various as to form and insertion ; capsule usually long- 

 stalked ; elaters various but never attached or extending from the 

 apex to the base of the capsule ; each elater with two or more spiral 

 fibres ; archegonia always four or more in a group. 



Families — Lophoziaceae (Epigonanthea}), Cephaloziaceae (Trigo- 

 nantheae), Ptilidiaceas, Scapaniaceae, Radulaceae, Porellaceae. 



B. Leaves typically divided into a large upper and a small lower 

 lobe, the latter usually rolled up or saccate ; under leaves (amphi- 

 gastria) usually present ; elaters few, with a single spiral fibre, all fixed 

 by the upper end to the apex of the capsule and extending to the base 

 of the capsule cavity ; archegonia from one to four (rarely more) in 

 a group. Fam. i — Lejeuneaceae. 



Cavers considers the Lophoziaceae to be the lowest forms, connect- 

 ing the other Acrogynae with Anacrogynae of the type of Fossombronia; 

 the Lejeuneaceae he places at the top of the acrogynous series. 



Spruce, however, as already stated, regards the Lejeuneaceae 

 (Jubuloideae) as entirely unrelated to the other families of the Acro- 

 gynae. 



CHAPTER IV 



P. 120. A fourth genus, Megaceros, is based upon material collected 

 by the writer in Java. (Campbell (30).) 



P. 121. In Megaceros there are several chromatophores in each 

 cell, sometimes a dozen or more in the large inner cells of the thallus. 



In Anthoceros Pearsoni, which resembles Megaceros, also, in having 

 soUtary antheridia, there are usually two chromatophores in the inner 

 cells. 



P. 128. Peirce (2) concludes from a study of Anthoceros grown 

 upon sterilized soil, and therefore free from Nostoc, that the presence of 

 the latter in the thallus is rather detrimental than otherwise. 



P. 128. For Waldner (2), read (i). 



P. 132. For Janczewski (2), read (i) ; for Waldner (2), read (i). 



P. 141. The species of Anthoceros with spiral elaters should be 

 transferred to the genus Megaceros. 



P. 145. For Goebel (22), read (21). 



P. 145. The genus Megaceros was established by the writer, to 

 include a number of species which had been included in Anthoceros, but 

 which differ from that genus in certain important particulars. 



