152 THE JOURNAL OF BOTANY 



great amount of reading— a useful bibliography is appended— and 

 a careful correlation of facts. It would be impossible to produce 

 a more admirable summary, and we warmly recommend it. There 

 is an excellent index. 



The last number (February) of the Journal of Genetics contains 

 no paper of exclusively botanical interest, but deals with problems 

 which indirectly affect botanical study. The principal paper, 

 which has an excellent coloured plate, is by Prof. Toyama, of the 

 Imperial University of Tokyo, and deals with " Maternal Inhe- 

 ritance and Mendelism," as illustrated by the eggs of silkworms. 

 Mr. Clifford Dobell writes on " Mutations in Bacteria," and Dr. 

 Trow on " Forms of Eeduplication, Primary and Secondary," 

 illustrated by his own observations on Senecio vulgaris and those 

 of Mr. Gregory on Primula sinensis. 



The Plant Protection Section of the Selborne Society is carry- 

 ing out a scheme by which it is hoped to elicit the sympathies of 

 all the local natural history societies on the question of Plant 

 Protection, and to appoint correspondents in as many places as 

 possible. The Executive Committee of the Section, which was 

 appointed at a meeting held at 42, Bloomsbury Square, on 

 January 30th, consists of Dr. A. B. Bendle (Chairman), Professor 

 G. S. Boulger, Professor Cavers, Mr. E. M. Holmes, Mr. C. E. 

 Salmon, and Mr. A. K. Horwood as Eecorder, together with the 

 Executive Officers of the Council. 



Under the somewhat ambiguous title Frequency in Floral 

 Analysis, Mr. Woodruffe-Peacock has added to his "Eural Studies 

 Series " a sixpenny pamphlet dealing with the methods of record- 

 ing the frequency of a plant in a given district. The scheme 

 proposed is, he tells us, " the result of eight failures and thirty 

 years' loss of time," and is ingenious and complete. Mr. Peacock 

 gives as an illustration his treatment of Lamium album, which 

 indicates the method to be adopted in his flora of Lincolnshire, 

 which we are glad to learn is in an advanced state. The some- 

 what elaborate division of the twelve pages into parts and sections 

 gives the pamphlet a confused appearance which is increased by 

 the typographical arrangement, It is supplied by Messrs. Gould - 

 ing, of 20, Mercer Eow, Louth. 



Messrs. Lovell Eeeve have issued as Parts x, xi, and xii a con- 

 tinuation of Fryer's Potamogetons of the British Isles, edited by Mr. 

 A. H. Evans from the author's MSS. and from his notes published 

 in this Journal. The existence of Morgan's excellent plates will 

 enable the work to be brought to a conclusion, and we are glad to 

 learn that the descriptive portion will be undertaken by Mr. 

 Arthur Bennett, who has throughout contributed the portion 

 relating to distribution. The mode of citation of synonyms offers 

 some ground for criticism and discussion, but all will welcome 

 the continuation and approaching completion of the work, which 

 many had feared would share the fate of Mr. Hanbury's mono- 

 graph of British Hicracia, 



