192 
been made to establish a new classification, based on the nature 
of the product of assimilation and on the structure of the zoos- 
pores. This system, as at present extant, is mainly due to the 
efforts of Bohlin*, who has published several interesting papers 
-on this subject during the last few years. Quite recently Black- 
man and Tansleyf have commenced to publish a “ Revision of 
the Classification of the Green Algae," based on Bohlin's gystem 
-with a few slight x dapes Some of these I have also adopted 
in my list; in other cases I have followed Bohlin’s views. 
Although far from Pus perfect, the present system expresses 
much more clearly than the old one di eu current ideas on the 
phylogenetic relationships of the green Alga 
For the Cyanophyceae I have mainly followed 2 classifi- 
cation in Cooke, British Freshwater Algae. The oms are 
arranged according to Rabenhorst, Flora Algarum rendi 
Vol. 1. 
Full descriptions and figures of the new forms found will be 
given in one of the next numbers of Annals o pene in which 
one or two doubiful forms will also be discusse 
Finally I have to thank Prof. Dr. Chodat, of Geneva, for his 
kind assistance in the de termination of certain plankton forms, 
minations, and it is a great pleasure to me to acknowledge and 
thank him for v extreme kindness.—Jodrell Laboratory, Kew, 
October 18th, 1902 
I. RHODOPHYCEAE. 
BATRACHOSPERMEAE. 
Chantransia, Fries, 1825. 
C. pygmaea, Kiitz. Phyc. Gen. 285. Formed large numbers of 
small round tufts on the stone sides of the middle tank of the 
water-lily house (No. 15) during March, 1902. This species 
appea some few weeks after the tank had been cleaned out, 
numerous dark red patches interrupting the stratum of Lyngbya, 
o er er of 
been found to take its place, although some species of this genus 
have been asserted to be only stages in the development of 
Batrachospermum, &c 
T Cp. berie Utkast till de gröna algernas och arkegoniaternas fylogeni, 
+ € ie es €: oi bees Prof. Tansley very kindly sent me an 
outline of that Reed f the re which had not »- appeared in ish for 
which I desire to express my y best rrr iy 
