168 THE JOURNAL OF BOTAWY 



lines of Thurston Cooke's Tropical Diseases ; he has arranged 

 them in alphabetical order under a list — also alphabetical — of the 

 host-plants. The method evidently has commended itself to the 

 practical grower as a ready means of ascertaining what is already 

 known as to the diseases to which any plant is liable ; but it involves 

 a good deal of repetition as the same or nearly related fungi occur 

 on various hosts, and gives little assistance in recognizing the nature 

 of any disease not previously known. Special attention is given to 

 curative methods. Several diseases due to Bacteria are carefully 

 described, such as the bud-rot of Coconut and the Citrus canker, but 

 the large bulk of those tabulated are caused by microfungi. Very 

 little attention has been paid to the larger fungi which do serious 

 damage in the tropical woods as elsewhere ; insects too are left out 

 of account. So far as it goes, however, the record is very complete 

 and provides a useful guide for a much wider field than the Philippine 

 Islands.— A. L. S. 



The Kew Bulletin issued in March (1919, nos. 1, 2) is mainly 

 occupied by a List of " Food and Fodder Plants " by Mr. J. H. 

 Holland, in which are given the chief countries of production with 

 details as to uses and other notes of interest and full references to 

 Avorks quoted. " The natural families first in importance for plants 

 of this nature are placed first in order " — an arrangement the possible 

 advantage of which hardly compensates for its obvious inconvenience 

 to those who are accustomed to follow a certain sequence of orders. 



The latest issue (vol. viii. n. 2 ; 24 April) of the Journal of 

 Oenetics is entirely devoted to botanical matters. E. S. Salmon 

 continues his account of experiments made at Wye College '* On 

 Forms of the Hop {Humulus Lupiilus L.) resistant to Mildew 

 {Sphcerofheca Humuli (DC.) Burr." ; Bateson gives the first of a series 

 of '* Studies in Variegation " in which he deals with '* Reversal in 

 Periclinal Chimseras " as exemplified in Euonymus japonicus lati- 

 foliusy Coprosma Baueri var. variegata, and three Pelargoniums — 

 the paper is accompaniod by two of the admirable coloured plates 

 w^iich have always been a feature of the Journal : S. C. Harland 

 treats of the " Inheritance of certain Characters in the Cow-pea 

 ( Vigna sinensis) " ; and 0. Winge, of the Carlsberg Laboratory, 

 Copenhagen, whites " On the Relation between number of Chromo- 

 somes and number of Types in Lathyrus especially." 



The Essex Field Club has issued a neat volume, the sixth of its 

 ** special memou's " (price not stated) on the Mycetozoa, containing 

 *' a short history of their study in Britain, an account of their habitats 

 generally, and a list of species recorded from Essex." The matter 

 in the little volume was delivered by the author, Miss Lister, as two 

 presidential addresses, at the annual meetings of the Club in 1917 

 and 1918 ; to these she has added a Hst, with descriptive notes, of the 

 species found in Essex and tables of those for certain other counties. 

 A plate contains three species found first in Essex — Badhamia folii- 

 cola, B. pojmlina, and Comatricha fimhriata — for a description of 

 which we are referred to p. 50 ; it will however be found on the back 

 of the table of contents. 



