54 



BRITISH SEA-WEEDS. 



weather-teller. It is very apt to sport, and many very 

 interesting, abnormal forms may be obtained by those 

 who will take the trouble to look for them. 



Iiaminaria Phyllitis. Hart's-tongne Laminaria. 



Stem short, slightly flattened ; frond linear-lanceolate, 

 membranous, entire. 



Some doubts are still admitted to exist as to whether 

 this is a distinct species, or only a very slender variety 

 of L. saccharina. The resemblance between the two is 

 close, but after careful examination Dr. Harvey is of 

 opinion that L. Phyllitis should be retained as a species. 



Laminaria fascia. Ribbon Iiaminaria. 



Stem very short and slender ; frond merribranous, of very 

 varying width and shape, from linear to broadly oblong, 

 entire. 



This is not a common species, but may be found in 

 many localities all round our coasts. It is the smallest 

 of the British Laminariae, seldom attaining a height 

 of more than nine or ten inches. 



Genus XIII. CHOEDA. 



Koot shield-shaped. Prond a simple cylindrical tube, 

 divided internally by transverse membranes, fructification 

 a layer of obconical spores, elongated at the base, spread 

 over the external surface of the frond. — Choeda, from the 

 Greek chorde, a string or cord. 



The geographical distribution of this genus is very 

 general, and the individuals are numerous on all the 

 northern shores of the Atlantic and Pacific Oceans, 



