NEW BRITISH MARINE ALGiE. 
93 
into three sections. The first, Speirogonicce, lias the fertile cells 
scattered, one, two, or three together ; the second, Zoniogonicce , 
has the fertile cells in series of 10-30 or more, intercalated in the 
branches ; and the third, Acrogonicce, has the fertile cells forming a 
terminal series in the branches. 
Other characters which are employed to distinguish the species 
are the presence of hooked branchlets, or of others of a short, spiny 
character, the presence of a distinct basal stratum, or of stoloniferous 
branches, the diameter of the branches, and the more or less 
compact character of the tufts. 
References to dried specimens in published exsiccata?, 1 * or to 
published illustrations in the present work or in those of previous 
authors, is given in every case, except in that of A. hemispherica, 
Kjellm. MS. 
The different species are found in fructification at definite 
periods in the year between April and September. 
There can be little doubt that most if not all the species will be 
found on the northern coasts of Britain, if carefully searched for, 
and specimens in fructification selected. It should be observed that 
the species bearing falcate branches are more compact in habit, 
and present an appearance as if battered or old, owing to the in- 
terweaving of the branchlets, and that others may be recognized 
in the sea by their different degrees of laxity or compactness of 
the tufts. 
Dr. Kj ell man is to be congratulated on having made a beginning 
in the very difficult task of arranging the large group of Clado- 
phorte on a scientific basis, and in pointing out a method of classi- 
fication which may be utilized in rearranging the species of this 
much-neglected genus. E. M. H. 
Supplementary Notes on the Marine Algae of the Orkney Islands. 
By G. W. Traill (Proceedings of the Botanical Society of 
Edinburgh ?). 
In this short paper Mr. Traill gives an account of the species of 
Algae collected by him in the summer of 1891 when staying at 
South Ronald say. The author, who, we regret to say, has been 
obliged to give up collecting owing to delicate health, informs us 
that he gathered 115 species, of which four, viz., Calothrix 
pulvinata , Calothrix scopulorum , Corallina Mediterranea , and 
Dictyosiphon hippuroides f. fragilis , were new to the Marine Flora 
of Orkney. The last of these, a form new to Britain, although 
not to Ireland, is illustrated by a characteristic figure. Harvey’s 
Dictyosiphon fragilis (a description of which first appeared in 
Kiitzing’s “ Species Algarum,” p. 485) was founded on specimens 
gathered at Kilkee, on the West Coast of Ireland, having a some- 
what different habit from D. foenicidaceus, and “ differing in having 
their spores collected in clusters, as in S triaria, but not disposed in 
* Apparently by a printer’s error. Faso. 23 of Wittrock and Nordstedt is 
repeatedly mentioned, when the number should be 22. 
