5. ~WEST GALWAY AND WEST MAYO~.--In this district we have again a complete change of geology and of scenery. The grey limestones with rich grass and rare flowers filling every crevice are gone, and we are in a wild region of ancient metamorphic rocks--schists, quartzites, gneisses, and granites--which form wide moorlands, dotted with innumerable lakelets, with noble mountain groups rising over the wild boggy lowlands. To the student of metamorphism the geology of this area is of very high interest. The botanist finds himself once again, as in Kerry, in a focus of the southern flora already discussed. As stated above, Connemara contributes to the list of Pyrenean plants three Heaths, of which St. Dabeoc's Heath is the loveliest of the British representatives of the order. Here we may also meet again our old Kerry friends the London Pride, and on Inisbofin the Irish Spurge--plants which strictly avoid the limestone, as do the Heaths. The American element is represented by the Pipe-wort, which is common, and the little water plant, _Naias flexilis_, which grows near Roundstone. Of the three famous Heaths, St. Dabeoc's is abundant throughout Connemara, becoming rarer in Mayo. The Mediterranean Heath grows near Roundstone, and in immense abundance on the north side of Clew Bay, and again near the north-west corner of Mayo, extending inland as far as Lough Conn. Mackay's Heath is the rarest, being confined to the neighbourhood of Roundstone. As regards its fauna, Connemara and West Mayo yield fewer peculiar species than the south-west; but much remains to be done before it can be said that the zoology of this area is thoroughly known, and it offers a most promising field for the explorer. 6. ~SLIGO.~--The visitor who makes Sligo his headquarters finds himself in a district of much variety and interest. This is a district that cannot be too highly recommended to the naturalist. To the geologist the fossiliferous limestones and the metamorphic rocks are alike of interest. The botanist naturally turns to the Ben Bulben Mountains, which harbour the richest group of alpine plants to be found in Ireland, including the pretty _Arenaria ciliata_, which does not grow elsewhere in the British Isles. To the zoologist a rich field lies waiting. A recent exploration of the limestone glens by a party of English and Irish conchologists has shown that in variety of land mollusca this district surpasses almost any other in these islands; and good results may be confidently expected in other invertebrate groups.