object which comes in its way. From some of the latter speci- 
mens our figure has been taken. 
It obviously differs im many characters, from any British 
species, but I am not prepared to say that it agrees with Agardh’s 
plant gathered at Trieste. Of the latter I have seen no speci- 
men, and form my judgment merely on the short description 
given by Agardh in the ‘Bot. Zeitung’, which completely 
answers to our plant. A comparison with authentic specimens 
would be very desirable. > 
From Mr. Cresswell I have also received another new Ca/othriz, 
having many characters in common with C. pannosa, but occur- 
ring in cushion-like, soft, fastigiate tufts, and with filaments very 
much more slender and hyaline than im that species. This last 
I propose to call C. Cresswellii, and to figure in a future number 
of this work. 
Fig. 1. CaLoTHRIX PANNOSA :—the natural size, growing partly on a piece of 
rock, partly on Fucus canaliculatus. 2. Part of the stratum :—slightly 
magnified, to show the honey-combed surface. 3. Filaments, twisted toge- 
ther. 4. Portion of a filament :—highly magnified. 
