Chordariece.'] elachistea. 167 



1. Elachistea eucicola {Conferva fiickola) , Fr. 



This and the following were formerly placed among Con- 

 fervcB. This one is very common on Fucus nodosus and 

 F. vesicidosus, forming olivaceous tufts. 



2. Elachistea flaccid a, Fi\ Parasitic on Fucus and 

 Ci/stoseira. 



3. Elachistea curta, Arescli, On Fuci. 



4. E1A.CHISTEA PULViNATA, Kiltz, On Cj/stoseira eri- 

 coides. 



5. Elachistea velutina^ Fries. Parasitical on Himan- 

 tlialia lorea. 



6. Elachistea stellulata, • ZT^x^T^y. On Dictyota di- 

 cliotoma. 



This very rare parasitical plants forming tufts half a liue 

 in diameter, resembling minute stars, was, in August 1850, 

 found in great abundance by Professor Balfour of Edin- 

 burgh and myself, when dredging in Lamlash Bay. It 

 was found at the same time by Major Martin. We got 

 numerous plants of B'lctyoia diclioto^na studded with it. As 

 it had never been found before, except by Mrs. Griffiths at 

 Torquay, I was not sure that it was really this rare plant 

 till I sent it to Professor Harvey. 



7. Elachistea scutulata, i^n^5. On Himanthalia lorea. 



