34 the botanical exchange club of the BRITISH ISLES. 
in being a much larger plant ; {b) scales seem rather those of a form 
oi sphnclosa—ihey have no dark centre. — E. G. Baker From the 
concolorous scales there is little doubt that it is L. spinulosa, 
and probably the var. exaltata (Lasch). — G. C. D. 
Nitella opaca, Agardh. Pond near Garstang, June 1903, W. 
Lancs. (60), sent as a vice-county record for (60), and so far 
not noticed elsewhere in the v.c., but it is very likely to occur. 
The pond in which the plant was growing is situated in a grass 
field, and had only been dug about iS months. It was made as an 
experiment to see what water plants would appear in it, and was 
carefully railed off to prevent access of cattle. Besides the Nitella 
5 other species had s*o far appeared, viz. Alisma Plantago-aquatica, 
Calliiriche Glyceria fluitans, /uncus conglomeratus, and /. 
lamprocarpus. — Albert W 1 lson . 
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