Belfast Lough, the habitat extending seemingly for miles. Baltic 

 specimens, as described by Agardh, are only a few inches in 

 length ; and such are some that I owe to the kindness of Dr. 

 Areschoug, of Gottenburg. Our Irish plants, on the contrary, 

 are comparatively giants ; the tufts being often two or three feet 

 in diameter. I have been forced to select a small one for illus- 

 tration, but the character of larger plants is very similar. In all 

 respects, except luxuriance, the Irish and Baltic plants are 

 identical. 



The brandling is sufficiently unlike that of C. flagelliformis, 

 resembling much more closely that of StilopJiora rhizodes, to 

 which outwardly our plant bears a very great resemblance. But 

 besides a difference in habit, it is well distinguished from C. 

 fagelliformis by the shape of the filaments of the periphery which 

 in that species are club-shaped, while in this they are slender, 

 but terminated by a large globular cellule. In this respect there 

 is a resemblance to a Mesogloia, but the structure of the axis is 

 exactly that of Cltordaria. 



Fig. 1. Chord aria divaricata : — natural size. 2. Longitudinal section of 

 the frond, showing part of the axis. 3. Transverse section of ditto. 

 4. Filaments of the periphery, and a spore. 5. Spores removed : — all 

 more or less magnified. 



