364 THE JOURNAL OF BOTANY 
carbon-assimilation, the chemistry of which is seriously out of date. 
Also, considering that a bound copy costs less than 8s. 6d., the 
paper-covered edition might be suppressed. The book is well worth 
the extra shilling charged for binding. eR Re 
Excnance Crus Reports. 
The Botanical Exchange Club of the British Isles. Report of the 
Distributor (James Groves, F.L.8.] for 1898. (Issued 18th 
ay, 1900. 
The Sixteenth Annual Report of the Watson Botanical Hachange Club, 
190 . & C. E. Salmon, Distributors. 
-tributor whose specimens upon. In the report of 
h 
critical genera. 
e observe that questions of nomenclature are finding their way 
into the Exchange Club Reports. The Messrs. Groves, we are sorry 
to see, endorse the principle “ once a synonym always a synonym ”’; 
and Prof. E. Hackel maintains that the employment of a name for 
a species invalidates its use for a variety of another species in the 
same genus : we cannot accept either of these positions. Some of 
the citations given are scarcely accurate: e.g. Mr. Druce writes 
*‘ Salvia pratensis, var. a., Linn. Sp. Pl. 25.” Linneus had a 
var. 6 of his pratensis, but no ‘‘var.a”’; and to credit him with one 
is to make him say what he did not say, and to introduce a new 
and inaccurate form of reference. The same writer’s citation of 
objection. The supplements to the Pharmaceutical Journal are of 
' : 
ef 
, p. 8345—a reference omitted by Mr. 
Druce both here and in his account of the plant in the Linnean 
Society’s Journal. : 
We extract the following notes of special interest for the benefit 
of those of our readers who do not belong to either Society. 
** Cerastium arcticum Lange, var. Edmondstonii Beeby. Serpentine 
Suen seta Shetland, 31st August, 1897, and 31st July, 1898.— 
; E 
When I first gathered this plant in 1886, I brought 
