164 GLAUCUS ; OR, 
to man’s deductive intellect, a form almost as impos- 
sible as the mermaid, far more impossible than the 
sea-serpent. These, and perhaps a few handsome 
sea-slugs and bivalve shells, you will be pretty sure 
to find: perhaps a great deal more. 
Meanwhile, without dredging, you may find a good 
deal on the shore. In the spring Doris bilineata 
comes to the rocks in thousands, to lay its strange 
white furbelows of spawn upon their overhanging 
edges. Eolides of extraordinary beauty haunt the 
same spots. The great Eolis papillosa, of a delicate 
French grey; Eolis pellucida (?) (Plate X. fig. 4), in 
which each papilla on the back is beautifully coloured 
with a streak of pink, and tipped with iron blue; and 
a most fantastical yellow little creature, so covered 
with plumes and tentacles that the body is invisible, 
which I believe to be the Idalia aspersa of Alder 
and Hancock. | 
At the bottom of the rock pools, behind St. Leo- 
nard’s baths, may be found hundreds of the Snipe’s 
feather Anemone (Sagartia troglodytes), of every 
hue; from the common brown and grey snipe’s 
