NOTES AND QUERIES. 341 
FISHES, 
Opah or King Fish in Shetland,—An Opah, or King-fish, Zeus luna. 
which is exceedingly rare, was recently caught off the Shetland Islands, and 
brought to the Colonial and Indian Exhibition for inspection. The speci- 
men, which is in perfect condition, measures about five feet in length, and 
weighs 160 pounds. ‘The colours of the sides and back are dark green 
intermingled with gold and purple, while the irides are red. The Opah 
possesses peculiar migratory propensities, being found even in Eastern seas. 
Its habits seem to be little known, but Mr. W. August Carter, of the 
Colonial and Indian Exhibition, states that, according to inquiries and 
investigations he has made, the Opah varies its diet according to the locality 
it inhabits, and that when visiting the British Islands it feeds chiefly upon 
herrings and cuttle-fish.— Nature, 
MOLLUSCA. 
Arion subfuscus and Helix hispida var. fusca in Yorkshire.—On 
June 2nd I found three specimens of Arion subfuscus, Drap., in a garden at 
Lofthouse. The species is well marked, being of an orange-brown colour, 
the shield somewhat brighter and clearer than the other parts. It is larger 
than A. hortensis, and it is surprising that the species has been so long 
overlooked. As it is apparently not rare, it must have been taken for a 
yellow variety of A. hortensis. I sent the three specimens to Mr. Cockerell, 
of Chiswick, who identified them for me. Together with a few other slugs 
and shells I sent a few specimens of Helix hispida, which Mr. Cockerell 
states are Mencke’s variety fusca, well known on the Continent, but which 
does not appear to have been previously recognised in the British Isles.— 
Gzorcx Rozerrs (Lofthouse, Wakefield). 
Limax -arborum and the influence of altitude on Colour.—It has 
been observed that in this Species, as in some others, individuals found in 
cold regions, or at great altitudes, are invariably darker, and have their 
markings more suffused than those of the warmer or less elevated regions. 
Two very striking instances of this have recently come under my notice, 
and seem to me to deserve recording. The Rev. A. H. Delap, sending me 
slugs from the neighbourhood of Clonmel, Ireland, has included specimens 
of L. arborum from the plains of North Waterford, which are distinctly and 
beautifully spotted with black, where he says they are locally abundant, 
and the ordinary form of England and Scotland had not been met with, 
But one day he ascended the Reeks (in Waterford), aud a hundred feet 
from the summit he met with the English type of the species; and at the 
extreme summit, 2300 feet above the sea-level, he found examples of a 
grey-black form in which the markings were entirely suffused over the 
body and rendered invisible. ‘This is the more interesting, because in the 
