vi List of the Contributors. 
Hutt, Epwarp G., B.A., 
On the Radiatine Powers of Shell-lac Films of various 
thickness, . 
JEFFREYS, J. Gwyn, LL.D., F.R.S. 
On some of the Mollusca procured during the Arctic 
Expedition of the “‘ Fox” in 1858 and 1859, 
Kinanan, Georce H., M.R.1LA. 
The Old Red Sandstone (so called) of Ireland in its 
relations to the Underlying and Overlying Strata. 
[Abridged] (with Plates 6 and 7), 
Cambro-Silurian and Silurian Rocks of the Southern and 
the Western Parts of Ireland (with Plate 8), 
Dingle and Glengarriff Grits (with Plate 14), 
Arklow Beach and Rivers (with Plates 16,17, and 18), 
Anniversary Address to the Royal Geological Society of 
Treland (1880), . 
Kirey, W. F. 
Catalogue of the Lepidoptera (Rhopalocera, Sphingidee, 
Castniide, and Uraniidz) in the Museum of Science and 
Art, Dublin, with remarks on new or interesting 
Species, 
Lasautx, A. Von. 
~ On the Tridymite-Quartz-Trachyte of Tardree Mountain, 
and on the Olivine-Gabbro of the Carlingford Mountains 
(with Woodcuts), 
thoy, ES a, CoE. 
Voluntary Act of Self-destruction by the Worker Bee, 
Moore, Davin, Pu.D. 
On a supposed new species of Ceratozamia, 
Moss, Epwarp, M.D., R.N. 
Notes on Arctic Air, . : ; 
On the effect of cold upon the Strength of Iron, 
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