15 



Two specimens of this widely distribiiled species, Ihe occurrence of which on 

 Ihe shores of Europe extends from the Mediterranean to Scothind and Helgoland, 

 were found washed ashore at Lokken. As they were quite fresh and were attached 

 lo a fragment of an acorn shell, they must undoubtedly have grown near the place 

 where they were found. They attained a length of (3,5 cm. and contained ripe and 

 unripe cystocarps. Small antheridial groups were also found on the surface of 

 the frond. As to the structure of the frond and the structure and development of 

 the fruit I have no new observations; reference may be made to the above quoted 

 papers, in particular those of Bohnet and Thuret, and Schmitz. The species is 

 easily recognizable by its soft, cylindrical, dichotomous frond having a thin solid 

 axis and by the characteristic, immersed cystocarps provided with a dense fruit-wall. 



Locality. Sk: Washed ashore at Lokken, August. 



CORRIGENDA. 



1^. y, 1.1) IVoni top, tor "Aiitithammion' read "Anlithamnion", lor "Litho- 



Ihaniion" read "Lithothamnion". 

 1^. 5(), 1. 8 I'rom top, for "ciishon ' read "cushion". 

 1^. 80, 1. 5 from to]), should read "P'am. 2". 

 P. 88, 1. 14 Irom toj), lor "e«rediunt" read "egrcdiuntur". 

 P. 91, 1.11 from to]), lor "egrediunt" read "egrediuntur". 

 P. 97, 1. 6 Ironi bottom, lor "egrediunt" read "egrediunlur" . 



