size and with a broader and more ovate frond. I rather think 

 that this ignorance of the fruit arises from imperfect observation. 

 The plant does not seem to be found all round the coast, and 

 where it has been observed has been in places only occasionally 

 and hastily visited by botanists ; and though I have myself 

 gathered it in my immediate neighbourhood, I must plead guilty 

 to having neglected to watch its growth from the commencement 

 to disappearance. Capt. Carmichael, a very close observer, was 

 persuaded of its distinct character ; and I have specimens from 

 North America and the Baltic closely resembling those from our 

 own shores. 



According to the younger Agardh the synonyme Zonaria 

 tenuissima, Ag., quoted by Greville belongs rather to Laminaria 

 fascia; for which reason the Swedish Algologist has substituted 

 the name undulata for that here adopted. 



Fig. 1. Punctakia tenuissima; growing on Chorda filum: — natural me. 

 2. Small portion of the membrane : — magnified. 



