62 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 
A List of the Algz of Lamlash Bay, Arran, collected 
during September, 1894. 
By Davip Rosertson, LL.D., F.L.S., F.G.S. 

[A Posthumous Paper, communicated by Mrs, Robertson, and read 30th 
March, 1897.] 

Lamuasu Bay is about three miles long in a line from Clauchlands 
Point to King’s Cross Point, intersecting a small portion of the 
Holy Isle. The widest part is from a little south of the village to 
the nearest point of the Holy Isle. The bay narrows at the north 
channel to a little more than three-quarters of a mile in a line 
between Clauchlands Point and the Holy Isle, and the souths 
channel to about one-third of a mile between King’s Cross Point 
and the Lighthouse. The greatest depth is twenty-four fathoms 
a little northward of St. Molios’s Cave, and the bay is deeper on 
an average towards the south channel than towards the north. 
The appearance of the shores of Lamlash Bay does not present 
much inducement to the. marine botanist. They are mostly bare, 
or with boulders covered here and there with coarse Alge. Few 
seaweeds are washed up on the beach, promising little of what 
may be had off-shore. The tide pools along the shore are mostly 
flat, and do not yield much along to Claughland Point. Round 
the point, towards Brodick, the pools are deeper and more 
sheltered from the sun, and yield a fair variety of the less common 
species. It may be worth while spending a little time among the 
pools on Hannilton Rock, where Codium tomentoswm, Stackh., was 
met with in fine condition. 
The water for some little distance off the shore, from the village 
along to near Claughland Point, is shallow and sandy. At many 
places a little beyond low-water large beds of Zostera are laid bare 
or brought into view at the surface, and they generally yield a 
variety of parasitic species, as well as others which seem to nestle 
among the roots of this plant. Our best results with the dredge 
