EXCURSION TO TENBY. 
11 
entrance to the glass tube; and to prevent tins, the addition 
of a light wire sieve of about an inch mesh is desirable at 
the mouth of the net. 
On the shore of St. Catherine’s Rock a fine specimen of a 
large Jelly-fish, Rhizostoma Cuvieri , was caught entangled in 
the sea-weed; the bell measured seventeen inches diameter 
and eight inches height, and it was composed of a thick, tough, 
cartilaginous substance of an opaque white. 
Many beautiful specimens of Sea Anemones were found 
upon the rocks, but they were difficult to remove in most 
cases, on account of shrinking back into holes in the honey¬ 
combed surface of the rocks. Under the overhanging rocks 
that were uncovered at low water, large numbers were seen 
hanging as long jelly-like pendants from the holes and 
crevices. The common Actinia mesembryanthemum was very 
plentiful, of great variety of colour ; a few of a very beautiful 
green, and one or two bright scarlet. Sagartia venusta, the 
orange-disc anemone, was in great numbers, but hi very 
inaccessible places; Sagartia nivea, the snow anemone, not 
so plentiful, and very difficult to get at, as they generally lay 
so deep in the crevices of the rocks; Dianthus plumosus, very 
plentiful; Telea crassicornis, only a few. These particulars 
of the Sea Anemones have been kindly supplied by Mrs. 
Rabone. 
Specimens of Serpula and Spio brought away upon pieces 
of stone and placed in a small aquarium glass, formed very 
interesting and beautiful objects for examination with the 
microscope, in a living state, and feeding upon small crumbs 
dropped into the water; numbers of the larva of Spio 
recently escaped were also seen floating about. 
In water holes in St. Catherine’s Rock there was found the 
branched polype, Plumularia pinnata, and a special piece of 
microscope work that was done was the mounting of specimens 
of Plumularia with the tentacles remaining expanded. This 
was effected by the plan of one of the members, Mr. Clarke; 
he administered minute doses of gin and sugar to the 
polypes at short intervals, until after about a quarter of an 
hour or longer they were found to be dead with their tentacles 
well expanded. 
Trials were made of different media for mounting, and on 
the whole Hainsch's fluid (consisting mainly of glycerine and 
alcohol) was found the most favourable for preserving delicate 
objects, such as the medusiform gonozoids ; but further 
trials and longer experience are required respecting this 
point. 
