172 THE MARINE BOTANIST. 



been found with this kind of fructification in any 

 other locality. I am informed by Mr. Hore that he 

 has in his possession '^ a portion of a single plant 

 dredged in Cork Harbour in advanced tetrasporic 

 fruit; in 1851. A similar specimen from Lisbon. 

 Two magnificent specimens from New Zealand : one 

 tetrasporic, six inches in length, the other with 

 tubercles filling a piece of paper 8 J inches by 7 ! " 

 At the time that Dr. Harvey included the genus 

 Stenogramme in this tribe, the secondary fruit was 

 unknown, and as one of the distinctions between 

 the Delesseria and Ehodymenia tribes consists in 

 the tetraspores in the latter never being collected 

 into well-defined sori, it would appear that Steno- 

 gramme should now be removed from hence.* The 

 structure of the outer stratum of cells in Gracilaria 

 shows an approach to Crytonemiacese, in which the 

 cells are connected together into fibres, and form a 



* Since writing the above, I have been informed by Dr. 

 Harvey that he removes this genus, though not without 

 doubt, to the neighbourhood of Phyllophora, while Pro- 

 fessor Agardh leaves it doubtfully (knomng the tetrasporic 

 fruit) in the Ehodymeniaceae. 



