condition it is sometimes a little difficult to distinguish specimens
of Chorda lomentaria, from narrow ones of Asperococcus echi-
natiis, except by their more chestnut colour and more polished
surface, and Capt. Carmichael has described such individuals
under the name of A. castaneus.
Authentic specimens of Kiitzing’s Chlorosiphon ShuUleworthia-
mis, obligingly communicated to me by that author, appear to me
to belong to the very youngest state of the present plant. They
were collected by Mr. Shuttleworth in the West of Ireland,
where our Chorda is abundant.
Pig, 1. Fronds of C h o r d a l o m e n t a r i a , of various ages;— natural size.
2. Transverse section of the frond. 3. Small portion of the same —more
highly magnified.
• i J