THE i 'Qtr m lHi^2> 



SCIENTIFIC PRO^^Jl^^ 



OF THE ^'^^-^-^ 



ROYAL DUBLIN SOCIETY. 



Yol. YII. (I. S.) MAECH, 1892. Part 3. 



CONTENTS. PAGE 



XIY — The Newly-hatched Larva of Euphyllia. By Professor A. C. 



Haddoi^, Eoyal College of Science, Dublin. (Plate XI.), f. 127 

 XV. — Reports on the Zoological Collections made in Torres Straits 

 by Professor A. C. Haddon, 1888-1889. Rhynchota from 

 Murray Island and Mabuiag. By George H. Caepentee, 

 B.Sc, Assistant Naturalist in the Science and Art Museum, 



Dublin. (Plates XII. and XIII.), 137 



XVI. — Improvements in Lighthouse Lights, with an Exhibition of the 



proposed New Burners and their Flames. By J. R. Wigham, 147 

 XVII. — On Homotcechus [Archceocidaris Harteana, Baily), a New 

 Genus of Palaeozoic Echinoids. By Professor W. J. Sollas, 



D.Sc, F.R.S., 152 



XVIII. — Callosities of Nitophyllum versicolor, Harv. (a New Mode of 

 Vegetative Reproduction of Eloridese). By T. Johnson, D.Sc, 

 F.L.S., Professor of Botany in the Royal College of Science, 



Dublin. (Plate XIV.), 156 



XIX. — On a Method of Preparing Schizomycetes, Saccharomycetes, and 

 Hyphomycetes as Museum Specimens, with a Demonstration 

 of Illustrative Cultivations. By E. J. M'Weeney, M.A., 



M.D., . . . 160 



XX. — On tbe Structure and Origin of the Quartzite Rocks in the 

 neighbourhood of Dublin. By Professor W. J. Sollas, D.Sc, 



LL.D., F.R.S. (Plate XV.), 169 



XXI — Lunar Radiant Heat, measured at Birr Castle Observatory 

 during the Total Eclipse of January 28, 1888. By Otto 

 BoEDDiCKEK, Ph.D. With an Introduction by The Earl of 

 Rosse, K.P., &c., President of the Royal Dublin Society. 



(Abstract), 189 



XXII.— The Slugs of Ireland. By R. F. Schaeff, Ph.D., B.Sc. 



(Abstract), 192 



XXIII. — On Shutters for Use in Stellar Photography. By J. Jolt, M.A., 

 B.E., D.Sc, an Assistant to the Erasmus Smith Professor of 

 Experimental Physics, Trinity College, Dublin, . . . 196 

 XXIV. — On the Cause of Double Lines and of Equidistant Satellites in 

 the Spectra of Gases. By G. Johnstone Stonet, M.A., 

 D.Sc, F.R.S. ; Vice-President, Royal Dublin Society (Abstract), 201 

 XX 7. — Analj'-sis of the Spectrum of Sodium, including an Inquiry into 

 the True Place of the Lines that have been regarded as Satel- 

 lites. By G. Johnstone Stoney, M.A., D.Sc, F.R.S. ; Vice- 

 President, Royal Dublin Society. (Plates X7I. and XVIL), 204 

 XXVI. — Survey of Fishing Grounds, West Coast of Ireland : Preliminary 

 Note on the Fish obtained during the Cruise of the SS. 

 "Harlequin," 1891. By Eenest W. L. Holt, . . .218 



The A uthors alone are responsible for all Opinions expressed in their Communications. 



DUBLIN: 



PUBLISHED BY THE EOYAL DUBLIN SOCIETY. 



LONDON: WILLIAMS & NORGATE, 14, HENRIETTA- STREET, 



COVENT GARDEN. 



1892. 



Price Four Shillings. 



