28 THE JOURNAL OF BOTANY 



It is, perhaps, can advantage to have the bibliography together 

 at the end of the volume, instead of at the end of each section, as 

 in the Oxford editions of Warming and Schimper; but in this case 

 either a continuous numbering of the notes should have been 

 adopted, or use should have been made of the page-headings to 

 guide those using these notes to the four different sections under 

 which they are grouped. Out of consideration for the eyesight of 

 readers, moreover, the reference-numbers might well have been 

 larger or in black type. We are afraid that notes placed among 

 these references to literature are too apt to be altogether over- 

 looked. While the printing and general get-up of the volume are 

 of the character usually associated with the house of Macmillan, 

 there are not a few little misprints, especially in the references to 

 figures, which have escaped correction from the earlier editions. 

 These may well be corrected by a page of errata in any reprint 

 which may precede the fifth edition ; but in that edition it would 

 add to the convenience of those using the book if the page was 

 added to references to figures in widely distant parts of the 

 volume. The meticulosity of our criticism is but an indication 

 of the great value we attach to the work as a whole, and our 

 consequent wish that it should approach yet nearer to perfection. 



G. S. BOULGER. 



A Hand-list of the Lichens of Great Britain, Ireland, and the 

 Channel Islands. Compiled by A. E. Horwood. Pp. 45. 

 Is. net. Dulau. 

 This list of British Lichens has been drawn up, as the 

 compiler states, primarily for the use of members of the Lichen 

 Exchange Club, but will be found serviceable for cataloguing 

 herbaria by all collectors. The nomenclature, and to some 

 degree the arrangement, is based upon the recently completed 

 Monograph of British Lichens by Crombieand Miss Lorrain Smith. 

 The sequence and system of classification, however, differ rather 

 widely from those adopted in the Monograph, the reasons for the 

 changes made being indicated by the compiler in the introduc- 

 tion. While assuming this arrangement is in accordance with 

 the most recent views, it may still be thought that the sequence 

 of a Manual which must remain par excellence the text-book for 

 British students for many years to come might have been more 

 conveniently adopted. One result of the change is that the 123 

 genera of the B. M. Catalogue are increased to 142, mainly by 

 the raising to generic rank many of Crombie's subgenera, as in 

 Lecanora. We do not know what authority Mr. Horwood has 

 followed in placing all the species of Physcia under Xanthoria, 

 especially as this name, adopted with some reason for the 

 naturally distinct group of yellow forms, becomes meaningless 

 when applied to the cinereous species. Some misprints are 

 inevitable, one supposes, in long lists of hard scientific names: 

 amongst the few observed may be instanced Anthracothcrium — 

 a word with a very zoological sound — which should read 

 Anthracothccium. The list is well got up, in good clear type. 



