ARTICLES IN JOURNALS. 93 
individual variations, and the determination of the geographical 
distribution of ee forms by means of the largest possible amount 
of material 
One of the examples is supplied by the woragean species of Gen- 
tiana, Section E’ndotricha. The first map shows by lines of sis 
orm and colour the range of all the fourteen species, and, 
Wettstein remarks, is as confused and useless as are poset 
rites over three maps (Nos. 2-4), order reigns in place of con- 
By devoting a map to each set of species with a Sis 
tat "aistinet disiesates areas, lhe obtains several geographically 
distinct sets. As the members of each set have common morpho- 
logical cha they are reduced to a group of ee of 
one species which is adjudged the type. The result is that the 
ole tection soraprises in Dr. Wettstein’s view, six woe es wi 
twenty-two subspecies. In the working out . these examples the 
author omtnns considerable ingenuity, bu “bu t one would like to have 
seen an instance dealt with where the distribution of the same or 
nearly-allied species is strikingly discontinuous. The geographic- 
morphological method, moreover, demands considerable knowledge 
a 
accurate information on distribution areas at the present time. 
fact, we fear it would be quite impracticable outside a oomperens 
well-worked province such as Kurope. Be that as it may, 
pee S essay is a suggestive one, and will call attention to the 
importance of geographical distribution as a not-to-be-neglected 
quantity is taxonomic problems. 4: BR 
ARTICLES IN JOURNALS.* 
Bot. aba sae 1).— F. W. Neger, ooo alpina in 
S. America. — P. Magnus, ‘ Ueber die von O. Kuntze vorgenom- 
menen Aenderungen der g ecto einiger Uredineen- Gaturgel? — 
E. Heinricher, ‘Die Lathrea-Arten Ja (No. 2). N. C. 
Kindbe magi ‘ sber die systematik der pentoeapiochenf Laubmoose.’. 
—(Nos. ee ‘ Carea orthostachys und ihr Ver- 
ie icwidaguticis: — (Nos. 4). G. Bode, ‘ Zur Reindarstellung 
des Chlorophylls.’ — F. Het, ‘ Controsperma und Polygonales des 
norddeutschen Tieflandes. 
The dates assigned to the numbers are those which appear on their covers 
or ose . but it must not always be inferred that this is the actual date of 
pu 
