of reddish felspar, green hornblende, a little quartz and mica. There are, however, variations from this the typical constitution. 1 Wales. Mynyd Cefn, Amwlch, near Pwllheli, N.W. of Ffestiniog, Pen-ar-fynydd, three miles east of Abardaron. Ireland. At Loughrusmore a large-grained syenite (or diorite) is found consisting of a crystalline gra nular aggregate of hornblende and felspar. Analyses of four varieties of syenite from Co. Donegal, by the Rev. Dr. Haughton, gives the proportion of silica as ranging from 49.2 to 58.05 per cent. In Carlingford mountain there occurs a handsome variety of ‘ anorthite syenite,’ composed of anor- tliite felspar and hornblende. Scotland. Strontian, Argyleshire; syenitic gra nite and syenite. Ben Glamich, Island of Skye. The Continent. A very handsome syenite is found in the Dresdner Falsterstein, the constituents of which are reddish felspar, hornblende, and a little quartz. A specimen is placed in the Museum of Trinity College, Dublin. Canada. Syenite, of handsome appearance and good quality for architectural purposes, occurs at Grenville. It consists of deep red orthoclase felspar, greenish-black hornblende, and grains of quartz in small quantity. A similar rock is also found at 1 Specimen in Museum of Trinity College, Dublin.