Well known as Darjiling is to nearly every stray traveller in India, the solid geology of the district has been left almost (I believe quite) untouched since the publication of Mallet's paper in 1874. There the Darjíling gneiss was described as the metamorphosed representative of the sedimentary Gondwana rocks of the south, and has so remained, albeit under protest, for a disclaiming paragraph appears in the Manual of the Geology of India. In the report of the Committee on the recent landslip at Darjíling it is stated that the rock of the country consists of “a well foliated and banded biotite gneiss with occasional lenses and deformed veins of granitic rock”; moreover, that “the foliation planes are often highly contorted”; and Mallet defines it as true gneiss “passing into mica schist or an intermediate variety.” These descriptions are meagre, and it is hoped that the following notes on specimens collected by the author may not be superfluous.