336 BRITISH SEA-WEEDS. \I)iatomace(B . 



Fi'ustules of a pale yellow lustre when recent, with a 

 glossy lustre when dry. They radiate from a minute base, 

 in a fan-shaped manner. 



Genus CIV. LICMOPHOEA, GrevlUe. 



Gen. Char. Frustules wedge-shaped, united into fan-shaped 

 laminre, fixed to the summit of a (usually branched) stipe. — 

 The name is from two Greek words sig-nifyingy»«-^^«;-6?r, highly 

 expressive of the form of these minute but beautiful objects. — 

 Ilooher. 



1. LiCMOPHORA FLABELLATA, GrevUle. 



Hab. On marine Alga3. Bantry Bay, Miss Plutchins ; 

 Appin, Captain Carmichael; Devonshire, Mrs. Griffiths; 

 Antrim, Mr. D. Moore; Strangford Lough, Mr. W. Thomp- 

 son ; Portincross, Ayrshire, D. L. 



Tufts half an inch high, deep green when recent (with us 

 very light greyish- green) ; when dry, grey and glistering. 

 Dr. Greville's figure of this interesting plant is thought 

 remarkably good. 



2. LiCMOPiiorwi SPLENDIDA, GrevUle. 



Ilab. Parasitic on marine AlgcC, and on Zostera marina. 

 Appin, Captain Carmichael. 



''A very fine species, nearly allied to L.jlabellata, but 

 smaller, less divided, and the frustules more broadly wedge- 



