* There are two dense hornbleudie belts which somewhat simulate dykes in the cliffs of the west shore of Loch Carloway

* A specimen was this year (1882) given me by Dr. Callaway, from near the shore of Loch kssynt, which has much actinolitlc hornblcude; and thus shows a transitiou into the igneous rock which occurs nezt in the series.

* It is, in no respect, of the nature of felsite, as stated by a late observer.

† The immediate, and what might be almost called adhesive, superposition of quartzite to dolomite at this locality, at an angle of 4° to 5°, must surely negative the view that a fault occurs here; while the absolute absence of any reappearance in inverted order of the argillaceous beds, within so short a distance as half a mile, is equally demolishing to the theory of an inversion of the whole series. The locality speaks plainly to the existence of an upper quartzite; there is neither need for taultj nor room for inversion.

* Mr. Hudleston picked up in Glen Coul, from the surface of "Logan rock," a loose fragment, in which the graphio lettering was surpassed in largeness of character by that of only three localities in Scotland.

* Since the silica of this sphene, as obtained from the bisulphats fusion, was not quite white when heated, it was re-fused; but it yielded no more titanic acid.

* In the figure the lacea marked f should be t.

* This crystal had been sent to him by Dr. Joau.

* Quite recently, I have been able to knock off so much of the white skin (which appears to ramify as this structur in the crystals) as enables me to say that it is a soda-lime felspar. Feb. 1883.

* Supposing the crystal to be placed as usual with the faces m vertical.

† See figure 3 of Plate V., also Hill of Fare crystal.

* Amazonstone was first stated to have been found in breaking up a boulder at RibigiU at the foot of the great north precipice of Ben Loyal. This was thought to be an error, but in the year 1882 I was presented by Mr. Wisdom with a portion of a crystal of amazonstone, which he broke out of a wall about 60 yards from RibigiU; and he stated that he thought he could see a vein running up the face of the cliff. Dr. Joass, in a letter of date March 20th, 1883, writes:--" The other day a good specimen of amazonstone, containing part of a large crystal of tourmaline, was brought to me as found in the burn running out of Lochan ttacon, where the rolled specimen was got which contained small flakes of talc, and which you thought curious. If is of interest to know that the vein with the amazonstone comes to the surface somewhere on the Ben Loyal side of the Tongue etrath, either in this burn or on some of the slopes overhanging it " This crystal of tourmaline is the first found in Sutherland. The absence of that mineral from the red granite and other veins of the Hebridian rock is a fact worthy of note.

* Vol. xxix. p. 6.

† As the modus operandi of such changes can be most easily studied by aid of the microscope, I have adopted what I considered the simplest and most satisfactory method of wide-spread publication,--namely, placing sufficient masses ot each rock in the hands of Messrs. Cole & Co, St. Domingo House, Oxford Gardens, London, W All subscribers to the highly deserving and admirably conducted enterprise of this Company will receive slices.

* There was also a small specimen of cryolite with crystalline sederite. This must havebeen '" picked up" by the pensioner in some other way and place.

* The examination of numerous sections supplied to me by Messrs. Cole with a view to the description of the rock in their "Studies in Microscopical Science "has enabled me considerably to extend my knowledge of this rock. Slices can be obtained from Messrs. Cole & Co.