Silurus, Dr Traill's description of a species found in Deme-
Slate quarries, Carnarvon, described,
Snowdon range of mountains, its geology and statistics de-
scribed by J. S. Menteath, Esq. 209-General survey,
210-State of cultivation of the Conway Basin, 215—
Forest trees, 216-Minerals, 218-Metals, 219-Menai
Basin, 223-Want of irrigation, 229-French whin em-
ployed as food for horses and cattle, 230-Carnarvon
slate, 233-Amount of tons, their value, and population
employed, 236-Veins of copper, 238-Anglesea, 240
-Its agricultural produce and live stock, 243-Coal and
copper, 247-Cardigan Bay Basin, 250-Menai iron-
bridges, 257-General summary, 258-List of grasses
and other plants,
Spiders, observations on the habits and food of, by Mr Mark
Watt,
Squalus, organ of hearing in the genus, described by Mr
Buchanan, 144-S. canus, 145-S. borealis, 146.
Auditory nerve,
Structure of the eye of the Sword-fish described by Dr
Grant,
Sturgeon, on the anatomical peculiarities of the, by Dr
Craigie, 334-Alimentary canal, 336-Pancreatoid, 346
-Spiral valve of the intestine, 353-Liver and spleen,
356 Urinary organs, 357-Additional observations, . 358
Sword-fish, on the structure of the eye of the, by Dr Grant, 118
Sun-fish, description of a new species of, by Dr Traill, 381
Traill, Dr, description of a Silurus, known in Demerara by
the name of Gilbacke,
Vegetation, phenogamic, of the Dee, Mr W. Macgillivray's
Watt, Mark, Esq. observations on the habits and food of
spiders,
Webs, Mr Watt's observations on the formation of spiders',
Wilson, James, Esq. on the origin of domestic poultry,
William, Esq. list of plants found on Snowdon,
Witham, Henry, Esq. notice regarding a vein of asphaltum,
or slaggy mineral pitch, found imbedded in gneiss, in
the hill of Castle Leod, near Dingwall,
Xiphias gladius, or Sword-fish, Dr Grant on the structure of
the eye of,
Young, Rev. George, on the fossil remains of quadrupeds, &c.
discovered in the cavern at Kirkdale, in Yorkshire, and
in other cavities or seams in limestone rocks, .
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PRINTED BY NEILL & CO., OLD FISHMARKET, EDINBURGH.
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