221 
possession of the Botanical Institute, were seen, and in Copen- 
hagen, at the Botanical Museum, a few of Lyngbye and of Vahl. 
From Copenhagen, I went to Lund in southern Sweden, where 
a stay of about a month, the longest of the journey, was made. 
In the herbarium of the University of Lund is deposited the 
Agardh collection of algae, consisting of more than 50,000 speci- 
mens and doubtless the richest in the world in respect of original 
materials from which marine species have been described. C. 
A. Agardh began to publish papers on the age of the 
algae as early as 1810. The last work of J. G ardh, his son, 
appeared in I9g01. During this active a a more than 
ninety years, they received much material from America, and 
the originals from which over two hundred North American 
(including West Indian) species have been proposed are to be 
found in the possession of the University of Lun 
In the herbarium of the Royal Academy of Sciences in Stock- 
holm I was permitted to examine types of the few Brazilian species 
described by Areschoug. This practically finished the summer's 
of types, though I had also the pleasure of visiting the 
universities of Upsala and of Kristiania, and of seeing some- 
thing of their important collections of alge. In England, on 
the homeward journey, I enjoyed the opportunity of visiting the 
botanical museums and laboratories of the Owens College, Man 
chester, and of the University College, Liverpool 
e photographs which were obtained of over three hundred 
of the types examined are expected to prove particularly useful 
in projected studies, especially in the case of forms which have 
never been figured and in genera like Gracilaria and Gigartina, 
in which attempts to define species have been based chiefly upon 
external form. Exchanges of specimens were made with several 
of the institutions visited, and others have been arranged for. 
Without attempting to name all who helped to make my 
visits to foreign herbaria pleasant and instructive, I feel that 
special acknowledgments of courteously granted privileges and 
valued assistance are due to Professor E. Perceval Wright, of 
is College, Dublin ; Mr. George Murray and Mr. and Mrs. 
ony Gepp, of the Botanical Department of the British 
