Cryptogamic Plants from the Ionian Islands. 339 
3. S. confervoides. Ag. Syst. Alg. p.232. Fucus confervoides. 
Turn. Hist. Fac. t. 84. 
4. S. acicularis. Ag. Syst. Alg. p.237. Fucus acicularis. Turn: 
Hist. Fuc. t. 126. 
Genus 18. . DELESSERIA. 
1. D. tenerrima, fronde tenuissimá, aveniá, lineari, dichotomá, 
rosea, apice obtusá; soris sporidiorum sparsis. ‘Tag. III. 
AS, 
In the sea, attached to shells, corallines, and marine plants. 
Root, a very minute callous disk, giving rise immediately to 
several very delicate fronds, which are from 2 to 4 inches in 
length, and regularly divided many times in a dichotomous 
manner, the segments divaricated, linear, 1—3 lines in 
breadth, obtuse at the apex, the margin entire. The reti- 
culation is very irregular, similar to that of D. punctata. 
Colour a most delicate and beautiful pink, acquiring a 
brownish tinge towards the base; but in decay becoming 
almost colourless. J have not observed any capsular fruc- 
tification, but the sor (as Agardh calls the clusters of seem- 
ingly naked granules) are scattered without any particular 
order over the frond. | 
` It is now two years since I received excellent specimens of this 
highly beautiful plant, collected in Devonshire by my esteemed 
friend Mrs. Griffiths: as few persons are so well acquainted with 
the actual vegetation of marine Alge, her opinion in favour of 
its being an undescribed species must be allowed to have great 
weight. Besides however studying the preserved specimens, I 
had an opportunity of examining some in their native place of 
growth at Torquay a few weeks ago, and thus am enabled to add 
my opinion to hers in support of their distinctness. 
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