HARVEY’S ILLUSTRATIONS. 305 
arly matted, almost spongy habit, and slender flexuose slightly 
branched filaments, which it is no easy task to separate on 
the table of the microscope. I have seen no continental 
specimens, therefore the correctness of my reference may be 
doubted, but so far as descriptions may determine the 
question, Agardh’s and our British Plant well agree. 
C. uncialis is nearly allied to C. centralis, in company with 
which it isin England found growing: there are however, 
abundant characters to distinguish them, even to the naked 
eye. 
SIPHONE.E. 
14. Codium adherens ; *fronde sessili crustacea irregu- 
lari.” Ag. Syst. p. 118. 
Ad rupes.—** Torquay." Dna. Griffiths, 1833. 
. This species requires more examination. It is almost 
impossible to judge accurately by dried specimens in this 
genus, I may say in this family, and I have not yet had an 
Opportunity of watching it on its native rocks. Mrs. 
Griffiths who kindly sent me specimens last autumn, gathered 
it some months afterwards in the locality from which her 
first specimens were taken, when the plant had extended : 
itself considerably without any disposition to throw up a 
frond like C. tomentosum. She is therefore of opinion that 
this is a true species and perfectly developed. However, 
when it is well known that C. tomentosum in its early stages 
is flat and expanded, it perhaps requires a longer trial, 
before we can fully determine the matter. Agardh’s speci- 
mens came from Cadiz, and I have received similar ones 
from the Mauritius. 
' Seconp Series. 2e 
