— 91 — 



Polytrichum commune L. Near Batoum. 



Leucodon immersus Lindb. Near Batoum, c. fr., and near the Caspian, 

 sterile. 



Amblystegium varium Lindb. Near the Caspian. 

 Brachythecium populeum B. & S. Near Batoum. 

 B. purum (L.) Dixon. Near the Caspian. 



Eurhynchium euchloron (Bruch.) Jur. & Milde. Near the Caspian; nice 

 gatherings of this characteristic species of the district. One of them is of a 

 very vivid green to which no doubt the plant owes its name. 



E. tenellum (Dicks.) Milde. Near the Caspian. 



Hypnum cupressiforme L. Near the Caspian, and also near Batoum. 

 The only hepatics in the collection were small fragments of Radula com- 

 planata (L.) Dum., and Frullania dilatata (L.) Dum., both from near the Caspian. 

 Lewes, England, i8 Oct., 1920. 



REVIEWS 



L New and Interesting South African Mosses, by H. N. Dixon, M. 

 A., F. L. S. (With plates XI and XII.) 



This is a reprint from the Transactions of the Royal Society of South Africa, 

 vol. VIII, part 3, 1920; Cape Town. Published by the Society. The paging 

 is unchanged and includes pp. 179 to 224. 



The author enumerates 180 species. Many of these are accompanied by 

 critical notes. It is a pleasure to follow this diligent author in his gentle but 

 relentless processes of reduction. Just as, in his Australian Antarctic Expedition 

 report, jointly with Rev. Watts, Mr. Dixon traced the identity with Bryum 

 antarcticum of B. filicaule, B. Gerlachei, B. inconnexum, B. austro-polare, and 

 ^'probably B. algens;'' so, in this paper, he has worked out in several cases the 

 identity of African species described by different authors. In his introduction 

 he states that while identity does not exist in very many cases between African 

 and North Temperate species, he is "convinced it exists in a certain number of 

 plants where it has hitherto not been recognized." In this he was confirmed by 

 some gatherings from high mountain elevations. This furnished an interesting 

 parallel to the entomological observation, made some years ago in the higher 

 mountains of New England, which showed the insect life near the tops of the 

 mountains remarkably related to the European mountain insects. Mr. Dixon 

 thus points out the identity with Bryum alpinum Huds. of B. afro-alpinum, and 

 probably of B. Wilmsii. Bryum Muhlenbeckii has several named African species 

 indistinguishable from it. Polytrichum flexicaule and commune are identical. 

 Several Tortulas described by C. Mueller are entirely identical with Tortula 

 ruralis. 



The author is critical in the correction of some spellings. Thus, on p. 185, 

 Campylopus inchangae is shown to be the right spelling from among four. 

 The new species described and figured are: 



